AU2012244121A1 - Histamine H3 receptor antagonists - Google Patents

Abstract

Novel compounds which interact with the histamine H3 receptor are defined. These compounds are particularly useful in the treatment of a variety of diseases or conditions 5 in which histamine H3 interactions are beneficial. Thus, the compounds may find use, e.g., in the treatment of diseases of the central nervous system, the peripheral nervous system, the cardiovascular system, the pulmonary system, the gastrointestinal system and the endocrinological system. The novel compounds have a core consisting of a 6 membered aromatic ring containing at least one nitrogen atom and two carbon atoms in 10 the ring and, at the remaining positions in the ring, there is either a carbon or a nitrogen atom.

Description

- 1 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT ORIGINAL Name of Applicant: High Point Pharmaceuticals, LLC Actual Inventors: Rolf Hohlweg and Knud Erik Andersen and Jan Lindy Sorensen and Jane Marie Lundbeck Address for Service is: SHELSTON IP 60 Margaret Street Telephone No: (02) 9777 1111 SYDNEY NSW 2000 Facsimile No. (02) 9241 4666 CCN: 3710000352 Attorney Code: SW Invention Title: Histamine H3 receptor antagonists Details of Original Application No. 2006264966 dated 30 Jun 2006 The following statement is a full description of this invention, including the best method of performing it known to me/us: File: 56602AUP01 - la HISTAMINE H3 RECEPTOR ANTAGONISTS The present application is a divisional application of Australian Application No. 2006264966, which is incorporated in its entirety herein by reference. 5 FIELD OF THIS INVENTION The present invention relates to novel compounds, to the use of these compounds in pharmaceutical compositions, to pharmaceutical compositions comprising the compounds, and to methods of treatment employing these compounds or compositions. The present compounds show a high and selective binding affinity for the histamine H3 10 receptor, indicating histamine H3 receptor antagonistic, inverse agonistic or agonistic activity. As a result, the compounds are useful for the treatment of diseases or disorders related to the histamine H3 receptor. BACKGROUND OF THIS INVENTION 15 Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field. The existence of the histamine H3 receptor has been known for several years and the receptor is of current interest for the development of new medicaments. Recently, the 20 human histamine H3 receptor has been cloned. The histamine H3 receptor is a presynaptic autoreceptor located both in the central and the peripheral nervous system, the skin and in organs such as the lung, the intestine, probably the spleen and the gastrointestinal tract. Recent evidence suggests that the H3 receptor shows intrinsic, constitutive activity, in vitro as well as in vivo (i.e., it is active in the absence of an 25 agonist). Compounds acting as inverse agonists can inhibit this activity. The histamine H3 receptor has been demonstrated to regulate the release of histamine and also of other neurotransmitters such as serotonin and acetylcholine. A histamine H3 receptor antagonist or inverse agonist would therefore be expected to increase the release of these neurotransmitters in the brain. A histamine H3 receptor agonist, on the contrary, 30 leads to an inhibition of the biosynthesis of histamine and an inhibition of the release of histamine and also of other neurotransmitters such as serotonin and acetylcholine. These findings suggest that histamine H3 receptor agonists, inverse agonists and antagonists could be important mediators of neuronal activity. Accordingly, the histamine H3 receptor is an important target for new therapeutics. 35 - 1b In view of the art's interest in histamine H3 receptor agonists, inverse agonists and antagonists, novel compounds which interact with the histamine H3 receptor would be a highly desirable contribution to the art. Several publications disclose the preparation and use of histamine H3 agonists and antagonists. Most of these are 5 imidazole derivatives. However, recently some imidazole-free ligands of the histamine H3 receptor have been described (see e.g. Linney et al., J. Med. Chem. 2000, 43, 2362-2370; US 6,316,475, WO 01/66534 and WO 01/74810). WO 00/66578 claims certain 3- or 4-(imidazol-2-yl)pyridines being substituted in the -2 4 position of the imidazole ring. It is mentioned that mammals having a disease or condition mediated by NPY can be treated with such a compound. Our earlier application, WO 2003/066604 (our internal ref.: 6447), claims certain piperazines being substituted in the 1 and 4 positions. 5 Our earlier application, WO 2005/009976 Al (our internal ref.: 6739), claims certain 3-(4-isopropylpiperazin-1-yl)-6-phenylpyrazines being substituted in the para position of the phenyl ring. In the specification, no pharmacological data are given for the compounds prepared. WO 2005/028438 claims certain piperidines being substituted in the 1 and 4 10 position. The object of this invention is to overcome or ameliorate at lest some of the disadvantages of the prior art. Hence, not all the objects mentioned below may be fully overcome or ameliorated. 15 DEFINITIONS In the structural formulae given herein and throughout the present specification, the following terms have the indicated meaning: The term "hydroxy" shall mean the radical -OH, the term "oxy" shall mean the radical -0-, the term "oxo" shall mean the radical =0, the term "carbonyl" shall mean the 20 radical -C(=O)-, the term "sulfinyl" shall mean the radical -(S=O)-, the term "sulfonyl" shall mean the radical -S(=0) 2 -, the term "carboxy" shall mean the radical -(C=0)O and -C(=0)OH, the term "amino" shall mean the radical -NH 2 , the term "nitro" shall mean the radical -NO 2 and the term "cyano" shall mean the radical -CN. 25 The term "C 2 -e-alkenyl" as used herein represents a branched or straight hydrocarbon group having from 2 to 6 carbon atoms and at least one double bond, e.g.

C

2 -6-alkenyl, C 3 .e-alkenyl, and the like. Representative examples are ethenyl (or vinyl), propenyl (e.g., prop-1-enyl and prop-2-enyl), butadienyl (e.g., buta-1,3-dienyl), butenyl (e.g., but-1-en-1-yl and but-2-en-1-yl), pentenyl (e.g., pent-1-en-1-yl and pent-2-en-2-yl), 30 hexenyl (e.g., hex-1-en-2-yl and hex-2-en-1-yl), 1-ethylprop-2-enyl, 1,1-(dimethyl)prop 2-enyl, 1-ethylbut-3-enyl, 1,1-(dimethyl)but-2-enyl, and the like. Analogously, the term "C 3 -8-alkenyl" as used herein represents a branched or straight hydrocarbon group having from 3 to 8 carbon atoms and at least one double bond, e.g.

C

3

.

6 -alkenyl, and the like. Representative examples are propenyl (e.g., prop-1 -enyl and 35 prop-2-enyl), butadienyl (e.g., buta-1,3-dienyl), butenyl (e.g., but-1-en-1-y and but-2-en- 3 1-yl), 1 -ethylprop-2-enyl, 1,1 -(dimethyl)prop-2-enyl, 1 -ethylbut-3-enyl, 1,1 -(dimethyl)but-2 enyl, and the like. The term "C 1

.

6 -alkoxy" as used herein refers to the radical C 1

.

6 -alkyl-O-. Representative examples are methoxy, ethoxy, propoxy (e.g., 1-propoxy and 2-propoxy), 5 butoxy (e.g., 1-butoxy, 2-butoxy and 2-methyl-2-propoxy), pentoxy (1-pentoxy and 2-pent oxy), hexoxy (1 -hexoxy and 3-hexoxy), and the like. The term "C 1

.

6 -alkoxy-C 1

.

6 -alkyl" as used herein refers to C 1

.

6 -alkyl substituted with

C

1

.

6 -alkoxy at any carbon atom. Representative examples are methoxymethyl, ethoxymethyl, 2-methoxyethyl, 2-ethoxyethyl, 3-methoxyprop-1 -yl, and the like. 10 The term "C 1 .- alkoxycarbonyl" as used herein refers to the radical C 1

.

6 -alkoxy C(=O)-. Representative examples are methoxycarbonyl, ethoxycarbonyl, 1 -propoxycarbonyl, 2-propoxycarbonyl, 1 -butoxycarbonyl, 2-butoxycarbonyl, 2-methyl-2-propoxycarbonyl, 3 methylbutoxycarbonyl, 1 -hexoxycarbonyl, and the like. The term "C 1

.

6 -alkyl" as used herein represents a saturated, branched or straight 15 hydrocarbon group having from 1 to 6 carbon atoms, e.g. C 1

.

3 -alkyl, C 1

.

4 -alkyl, C 2

.

6 -alkyl, C36 alkyl, and the like. Representative examples are methyl, ethyl, propyl (e.g., prop-1 -yl and prop-2-yl (or isopropyl)), butyl (e.g., 2-methylprop-2-yl (or tert-butyl), but-1 -yl and but-2-yl), pentyl (e.g., pent-1 -yl, pent-2-yl and pent-3-yl), 2-methylbut-1-yl, 3-methylbut-1-yl, hexyl (e.g., hex-1 -yl), heptyl (e.g., hept-1-yl) and the like. 20 Analogously, the term "C 1

.

8 -alkyl" as used herein represents a saturated, branched or straight hydrocarbon group having from 1 to 8 carbon atoms, e.g. C 1

-

3 -alkyl, C 14 -alkyl, C1. 6 -alkyl, C 2

.

6 -alkyl, C 3 .- alkyl, C 1

.

8 -alkyl, and the like. Representative examples are methyl, ethyl, propyl (e.g., prop-1 -yl and prop-2-yl (or isopropyl)), butyl (e.g., 2-methylprop-2-yl (or tert-butyl), but-1 -yl and but-2-yl), pentyl (e.g., pent-1 -yl, pent-2-yl and pent-3-yl), 2-methylbut 25 1-yl, 3-methylbut-1-yl, hexyl (e.g., hex-1 -yl), heptyl (e.g., hept-1-yl), octyl (e.g., oct-1 -yl), and the like. The term "C 1 .- alkylcarbonyl" as used herein refers to the radical C1 6 -alkyl-C(=O)-. Representative examples are acetyl (e.g., methylcarbonyl), propionyl (e.g, ethylcarbonyl), bu tanoyl (e.g., prop-1 -ylcarbonyl and prop-2-ylcarbonyl), and the like. 30 The term "C1 .

6 -alkylcarbonylamino" as used herein, refers to the radical C 1

.

6 -alkyl C(=O)-NH-. Representative examples are acetylamino, propionylamino, pivaloylamino, va leroylamino, and the like. The term "C 1

.

6 -alkylcarbonylamino-C 1

.

6 -alkyl" as used herein, refers to C 1

.

6 -alkyl substituted at any carbon atom with C 1

.

6 -alkylcarbonylamino. Representative examples are 35 acetylaminomethyl, 1 -(acetylamino)ethyl, propionylaminomethyl, and the like.

4 The term "C 1

.

6 -alkylcarboxy" as used herein refers to the radical C 1

.

6 -alkyl-C(=O)O-. Representative examples are methylcarboxy, ethylcarboxy, propylcarboxy (e.g., prop-1 -yl carboxy, prop-2-ylcarboxy), and the like. The term "C 1 6 -alkylsulfanyl" as used herein refers to the radical C 1 .- alkyl-S-. Repre 5 sentative examples are methylthio, ethylthio, propylthio (e.g., 1-propylthio, 2-propylthio and 3-propylthio), butylthio, pentylthio, hexylthio, and the like. The term "C 16 -alkylsulfinyl" as used herein refers to the radical C 1

.

6 -alkyl-S(=O)-. Representative examples are methylsulfinyl, ethylsulfinyl, propylsulfinyl, butylsulfinyl, pentyl sulfinyl, hexylsulfinyl, and the like. 10 The term "C 1 6 -alkylsulfonyl" as used herein refers to the radical C 1

.

6 -alkyl-S(=0) 2 -. Representative examples are methylsulfonyl, ethylsulfonyl, propylsulfonyl, butylsulfonyl, pen tylsulfonyl, hexylsulfonyl, and the like. The term "C 3

.

8 -alkynyl" as used herein represents a branched or straight hydrocar bon group having from 3 to 8 carbon atoms and at least one triple bond. Representative ex 15 amples are propynyl (e.g., prop-1 -ynyl and prop-2-ynyl), butynyl (e.g., but-1 -ynyl and but-2-y nyl), pentynyl (e.g., pent-1 -ynyl and pent-2-ynyl), hexynyl (e.g., hex-1 -ynyl and hex-2-ynyl), 1 ethylprop-2-ynyl, 1,1 -(dimethyl)prop-2-ynyl, 1 -ethylbut-3-ynyl, 1,1 -(dimethyl)but-2-ynyl, and the like. The term "aryl" as used herein is intended to include monocyclic, bicyclic or poly 20 cyclic carbocyclic aromatic rings. Representative examples are phenyl, naphthyl (e.g., naphth-1-yl and naphth-2-yl), anthryl (e.g., anthr-1-yl and anthr-9-yl), phenanthryl (e.g., phe nanthr-1 -yl and phenanthr-9-yl), and the like. Aryl is also intended to include monocyclic, bi cyclic or polycyclic carbocyclic aromatic rings substituted with carbocyclic aromatic rings. Representative examples are biphenyl (e.g., biphenyl-2-yl, biphenyl-3-yl and biphenyl-4-yl), 25 phenylnaphthyl (e.g.1 -phenylnaphth-2-yl and 2-phenylnaphth-1 -yl), and the like. Aryl is also intended to include partially saturated bicyclic or polycyclic carbocyclic rings with at least one unsaturated moiety (e.g., a benzo moiety). Representative examples are, indanyl (e.g., in dan-1 -yl, indan-5-yl), indenyl (e.g., inden-1 -yl and inden-5-yl), 1,2,3,4-tetrahydronaphthyl (e.g., 1,2,3,4-tetrahydronaphth-1-yl, 1,2,3,4-tetrahydronaphth-2-yl and 1,2,3,4-tetrahydro 30 naphth-6-yl), 1,2-dihydronaphthyl (e.g., 1,2-dihydronaphth-1-yl, 1,2-dihydronaphth-4-yl and 1,2-dihydronaphth-6-yl), fluorenyl (e.g., fluoren-1 -yl, fluoren-4-yl and fluoren-9-yl), and the like. Aryl is also intended to include partially saturated bicyclic or polycyclic carbocyclic aro matic rings containing one or two bridges. Representative examples are, benzonorbornyl (e.g., benzonorborn-3-yl and benzonorborn-6-yl), 1,4-ethano-1,2,3,4-tetrahydronapthy (e.g., 35 1,4-ethano-1,2,3,4-tetrahydronapth-2-y and 1,4-ethano-1,2,3,4-tetrahydronapth-1 O-yl), and 5 the like. Aryl is also intended to include partially saturated bicyclic or polycyclic carbocyclic aromatic rings containing one or more spiro atoms. Representative examples are spiro[cyclo pentane-1,1'-indane]-4-yl, spiro[cyclopentane-1,1'-indene]-4-yl, spiro[piperidine-4,1'-indane] 1-yl, spiro[piperidine-3,2'-indane]-1 -yl, spiro[piperidine-4,2'-indane]-1 -yl, spiro[piperidine-4, 1' 5 indane]-3'-yl, spiro[pyrrolidine-3,2'-indane]-1-yl, spiro[pyrrolidine-3,1'-(3',4'-dihydro naphthalene)]-1 -yl, spiro[piperidine-3,1'-(3',4'-dihydronaphthalene)]-1 -yl, spiro[piperidine-4,1' (3',4'-dihydronaphthalene)]-1-yl, spiro[imidazolidine-4,2'-indane]-1-yI, spiro[piperidine-4,1' indene]-1-yl, and the like. The term "aryl-C 1 .- alkoxycarbonyl" as used herein refers to the radical aryl-C 1 . 10 6 -alkoxy-C(=O)-. Representative examples are benzyloxycarbonyl, phenylethoxycarbonyl (e.g., (2-phenylethoxy)carbonyl and (1 -phenylethoxy)carbonyl), and the like. The term "arylcarbonyl" as used herein, refers to the radical aryl-C(=O)-. Represen tative examples are benzoyl, naphthylcarbonyl, 4-phenylbenzoyl, anthrylcarbonyl, phenanthryl carbonyl, and the like. 15 The term "arylcarbonylamino" as used herein, refers to the radical aryl-C(=O)-NH-. Representative examples are benzoylamino, naphthylcarbonylamino, 4-phenylbenzoylamino, and the like. The term "arylcarbonylamino-C 1

.

6 -alkyl" as used herein, refers to C 1

.

6 -alkyl substi tuted at any carbon atom with arylcarbonylamino. Representative examples are benzoylami 20 nomethyl, naphthylcarbonylaminomethyl, 2-(4-phenylbenzoylamino)ethyl, and the like. The term "arylsulfonyl" as used herein refers to the radical aryl-S(=0) 2 -. Representa tive examples are phenylsulfonyl, (4-methylphenyl)sulfonyl, (4-chlorophenyl)sulfonyl, naphthyl sulfonyl, and the like. The term "cyano-C 1

.

6 -alkyl" as used herein refers to C 16 -alkyl, substituted at any 25 carbon atom(s) with cyano. Representative examples are cyanomethyl, 2-cyanoethyl, and the like. The term "C 3 .- cycloalkenyl" as used herein represents a partially saturated mono cyclic carbocyclic ring having from 3 to 8 carbon atoms and at least one double bond. Repre sentative examples are cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, cyclohep 30 tenyl, cyclooctenyl, cyclohex-1,3-dienyl, and the like. Obviously, the term "C3.

8 -cycloalkenyl-C 1

.

3 -alkyl" is a combination of C3 8 -cyclo alkenyl and C 1

.

3 -alkyl. Representative examples are cyclopenten-1 -ylmethyl, 3-(cyclohexen-1 yl)propyl, and the like. The term "C 3

-

8 -cycloalkyl" as used herein represents a saturated monocyclic carbo 35 cyclic ring having from 3 to 8 carbon atoms, e.g. C3.

6 -alkyl, and the like. Representative ex- 6 amples are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and the like. C 3

.

8 -cycloalkyl is also intended to represent a saturated bicyclic carbocyclic ring having from 4 to 8 carbon atoms. Representative examples are decahydronaphthalenyl, bicycle [3.3.0]octanyl, and the like. C 3

-

8 -cycloalkyl is also intended to represent a saturated carbocyc 5 lic ring having from 3 to 8 carbon atoms and containing one or two carbon bridges. Repre sentative examples are adamantyl, norbornanyl, nortricyclyl, bicyclo[3.2.1]octanyl, bicyclo [2.2.2]octanyl, tricyclo[5.2.1.0/2,6]decanyl, bicyclo[2.2.1 ]heptyl, and the like. C 3

.

8 -cycloalkyl is also intended to represent a saturated carbocyclic ring having from 3 to 8 carbon atoms and containing one or more spiro atoms. Representative examples are spiro[2.5]octanyl, spiro 10 [4.5]decanyl, and the like. Obviously, the term "C 3 .- cycloalkyl-C 1

.

3 -alkyl" is a combination of Ca.-cycloalkyl and

C

1

-

3 -alkyl. Representative examples are cyclopropylmethyl, 2-cyclohexylethyl, 3-cyclopentyl prop-1 -yl, 1 -cyclohexylethyl, adamantylmethyl, and the like. Representative examples of "C 3 a-cycloalkylcarbonylamino-C.

6 -alkyl" as used herein 15 is cyclopentylcarbonylamino-methyl, 3-(cyclohexylcarbonylamino)propyl, and the like. The term "halo-C 1

.

6 -alkyl" as used herein refers to C 1

.

6 -alkyl, substituted one or more times at any carbon atom(s) with any halogen. Representative examples are trifluoromethyl, 2,2,2-trifluoroethyl, and the like. The term "halo-C 1

.

6 -alkoxy" as used herein refers to C 1

.

6 -alkoxy, substituted one or 20 more times at any carbon atom(s) with any halogen. Representative examples are trifluoro methoxy and 2,2,2-trifluoroethoxy, and the like. The term "halogen" or "halo" means fluorine, chlorine, bromine or iodine. The term "heteroaryl" as used herein is intended to include monocyclic heterocyclic aromatic rings containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, SO and 25 S(=0)2. Representative examples are pyrrolyl (e.g., pyrrol-1 -yl, pyrrol-2-yl and pyrrol-3-yl), furanyl (e.g., furan-2-yl and furan-3-yl), thienyl (e.g., thien-2-yl and thien-3-yl), oxazolyl (e.g., oxazol-2-yl, oxazol-4-yl and oxazol-5-yl), thiazolyl (e.g., thiazol-2-yl, thiazol-4-yl and thiazol-5 yl), imidazolyl (e.g., imidazol-2-yl, imidazol-4-yl and imidazol-5-yl), pyrazolyl (e.g., pyrazol-1 yl, pyrazol-3-yl and pyrazol-5-yl), isoxazolyl (e.g., isoxazol-3-yl, isoxazol-4-yl and isoxazol-5 30 yl), isothiazolyl (e.g., isothiazol-3-yl, isothiazol-4-yl and isothiazol-5-yl), 1,2,3-triazolyl (e.g., 1,2,3-triazol-1 -yl, 1,2,3-triazol-4-yl and 1,2,3-triazol-5-yl), 1,2,4-triazolyl (e.g., 1,2,4-triazol-1 yl, 1,2,4-triazol-3-yl and 1,2,4-triazol-5-yl), 1,2,3-oxadiazolyl (e.g., 1,2,3-oxadiazol-4-yl and 1,2,3-oxadiazol-5-yl), 1,2,4-oxadiazolyl (e.g., 1,2,4-oxadiazol-3-yl and 1,2,4-oxadiazol-5-yl), 1,2,5-oxadiazolyl (e.g., 1,2,5-oxadiazol-3-yl and 1,2,5-oxadiazol-4-yl), 1,3,4-oxadiazolyl (e.g., 35 1,3,4-oxadiazol-2-yl and 1,3,4-oxadiazol-5-yl), 1,2,3-thiadiazolyl (e.g., 1,2,3-thiadiazol-4-yl and 7 1,2,3-thiadiazol-5-yl), 1,2,4-thiadiazolyl (e.g., 1,2,4-thiadiazol-3-yl and 1,2,4-thiadiazol-5-yl), 1,2,5-thiadiazolyl (e.g., 1,2,5-thiadiazol-3-y and 1,2,5-thiadiazol-4-yl), 1,3,4-thiadiazolyl (e.g., 1,3,4-thiadiazol-2-yl and 1,3,4-thiadiazol-5-yl), tetrazolyl (e.g., tetrazol-1 -yl and tetrazol-5-yl), pyranyl (e.g., pyran-2-yi), pyridinyl (e.g., pyridine-2-yl, pyridine-3-yl and pyridine-4-yl), pyri 5 dazinyl (e.g., pyridazin-2-yl and pyridazin-3-yl), pyrimidinyl (e.g., pyrimidin-2-yl, pyrimidin-4-yl and pyrimidin-5-yl), pyrazinyl, 1,2,3-trazinyl, 1,2,4-triazinyl, 1,3,5-triazinyl, thiadiazinyl, azepinyl, azecinyl, and the like. Heteroaryl is also intended to include bicyclic heterocyclic aromatic rings containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 . Representative examples are indolyl (e.g., indol-1-yl, indol-2-yl, indol-3-yl 10 and indol-5-yl), isoindolyl, benzofuranyl (e.g., benzo[b]furan-2-yl, benzo(b]furan-3-yl, benzo [b]furan-5-yl, benzo[c]furan-2-yl, benzo[c]furan-3-yl and benzo[c]furan-5-yl), benzothienyl (e.g., benzo[b]thien-2-yl, benzo[b]thien-3-yl, benzo[b]thien-5-yl, benzo[c]thien-2-yl, benzo[c] thien-3-yl and benzo[c]thien-5-yl), indazolyl (e.g., indazol-1 -yl, indazol-3-yl and indazol-5-yl), indolizinyl (e.g., indolizin-1 -yl and indolizin-3-yl), benzopyranyl (e.g., benzo[b]pyran-3-yl, 15 benzo[b]pyran-6-yl, benzo[c]pyran-1-yl and benzo[c]pyran-7-yl), benzimidazolyl (e.g., ben zimidazol-1 -yl, benzimidazol-2-yl and benzimidazol-5-yl), benzothiazolyl (e.g., benzothiazol 2-yl and benzothiazol-5-yl), benzisothiazolyl, benzoxazolyl, benzisoxazolyl, benzoxazinyl, ben zotriazolyl, naphthyridinyl (e.g., 1,8-naphthyridin-2-yl, 1,7-naphthyridin-2-yl and 1,6-naphthy ridin-2-yl), phthalazinyl (e.g., phthalazin-1-yl and phthalazin-5-yl), pteridinyl, purinyl (e.g., pu 20 rin-2-yl, purin-6-yl, purin-7-yl, purin-8-yl and purin-9-yl), quinazolinyl (e.g., quinazolin-2-yl, quinazolin-4-yl and quinazolin-6-yl), cinnolinyl, quinoliny (e.g., quinolin-2-yl, quinolin-3-yl, quinolin-4-yl and quinolin-6-yl), isoquinolinyl (e.g., isoquinolin-1-yl, isoquinolin-3-yl and iso quinolin-4-yl), quinoxalinyl (e.g., quinoxalin-2-yl and quinoxalin-5-yl), pyrrolopyridinyl (e.g., pyrrolo[2,3-b]pyridinyl, pyrrolo[2,3-c]pyridinyl and pyrrolo[3,2-c]pyridinyl), furopyridinyl (e.g., 25 furo[2,3-b]pyridinyl, furo[2,3-c]pyridinyl and furo[3,2-c]pyridinyl), thienopyridinyl (e.g., thieno (2,3-b]pyridinyl, thieno[2,3-c]pyridinyl and thieno[3,2-c]pyridinyl), imidazopyridinyl (e.g., imi dazo[4,5-b]pyridinyl, imidazo[4,5-c]pyridinyl, imidazo[1,5-a]pyridinyl and imidazo[1,2-a] pyridinyl), imidazopyrimidinyl (e.g., imidazo[1,2-a]pyrimidinyl and imidazo[3,4-a]pyrimidinyl), pyrazolopyridinyl (e.g., pyrazolo[3,4-b]pyridinyl, pyrazolo[3,4-c]pyridinyl and pyrazolo[1,5-a] 30 pyridinyl), pyrazolopyrimidinyl (e.g., pyrazolo[1,5-a]pyrimidinyl and pyrazolo[3,4-d]pyrimidin yl), thiazolopyridinyl (e.g., thiazolo[3,2-d]pyridinyl), thiazolopyrimidinyl (e.g., thiazolo[5,4-d] pyrimidinyl), imidazothiazolyl (e.g., imidazo[2,1 -b]thiazolyl), triazolopyridinyl (e.g., triazolo [4,5-b]pyridinyl), triazolopyrimidinyl (e.g., 8-azapurinyl), and the like. Heteroaryl is also in tended to include polycyclic heterocyclic aromatic rings containing one or more heteroatoms 35 selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 . Representative examples are car- 8 bazolyl (e.g., carbazol-2-yl, carbazol-3-yl, carbazol-9-yl), phenoxazinyl (e.g., phenoxazin-1 0 yl), phenazinyl (e.g., phenazin-5-yl), acridinyl (e.g., acridin-9-yl and acridin-10-yl), phenol thiazinyl (e.g., phenothiazin-1 0-yl), carbolinyl (e.g., pyrido[3,4-b]indol-1 -yl, pyrido[3,4-b]indol 3-yl), phenanthrolinyl (e.g., phenanthrolin-5-yl), and the like. Heteroaryl is also intended to 5 include partially saturated monocyclic, bicyclic or polycyclic heterocyclic rings containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 . Representa tive examples are pyrrolinyl, pyrazolinyl, imidazolinyl (e.g., 4,5-dihydroimidazol-2-yl and 4,5 dihydroimidazol-1 -yl), indolinyl (e.g., 2,3-dihydroindol-1 -yl and 2,3-dihydroindol-5-yl), dihydro benzofuranyl (e.g., 2,3-dihydrobenzo[b]furan-2-y and 2,3-dihydrobenzo[b]furan-4-yl), dihydro 10 benzothienyl (e.g., 2,3-dihydrobenzo[b]thien-2-y and 2,3-dihydrobenzo[b]thien-5-yl), 4,5,6,7 tetrahydrobenzo[b]furan-5-yl), dihydrobenzopyranyl (e.g., 3,4-dihydrobenzo[b]pyran-3-yl, 3,4 dihydrobenzo[b]pyran-6-yl, 3,4-dihydrobenzo[c]pyran-1 -yl and dihydrobenzo[c]pyran-7-yl), oxazolinyl (e.g., 4,5-dihydrooxazol-2-yl, 4,5-dihydrooxazol-4-yl and 4,5-dihydrooxazol-5-yl), isoxazolinyl, oxazepinyl, 2,4-dioxodihydropyrimidin-3-yl, tetrahydroindazolyl (e.g., 4,5,6,7 15 tetrahydroindazol-1 -yl, 4,5,6,7-tetrahydroindazol-3-yl, 4,5,6,7-tetrahydroindazol-4-yl and 4,5,6,7-tetrahydroindazol-6-yl), tetrahydrobenzimidazolyl (e.g., 4,5,6,7-tetrahydrobenz imidazol-1 -yl and 4,5,6,7-tetrahydrobenzimidazol-5-y), tetrahydroimidazo[4,5-c]pyridyl (e.g., 4,5,6,7-tetrahydroimidazo[4,5-c]pyrid-1 -yl, 4,5,6,7-tetrahydroimidazo[4,5-c]pyrid-5-y and 4,5,6,7-tetrahydroimidazo[4,5-c]pyrid-6-yl), tetrahydroquinolinyl (e.g., 1,2,3,4-tetrahydro 20 quinolinyl and 5,6,7,8-tetrahydroquinolinyl), tetrahydroisoquinolinyl (e.g., 1,2,3,4-tetrahydro isoquinolinyl and 5,6,7,8-tetrahydroisoquinolinyl), tetrahydroquinoxalinyl (e.g., 1,2,3,4-tetra hydroquinoxalinyl and 5,6,7,8-tetrahydroquinoxalinyl), 2,3-dihydrobenzo[1,4]dioxin-6-yl, 2,3 dihydrobenzo[1,4]dioxin-5-yl, 2,3-dihydrobenzo[1,4]dioxin-2-yl, benzo(1,3]dioxol-4-yl, benzo [1,3]dioxol-5-yl, benzo[1,3]dioxol-2-yl, 3,4-dihydro-2H-benzo[1,4]oxazin-7-yl, 4-methyl-3,4-di 25 hydro-2H-benzo[1,4]oxazin-7-yl and the like. Heteroaryl is also intended to include partially saturated bicyclic or polycyclic heterocyclic rings containing one or more spiro atoms. Repre sentative examples are spiro[isoquinoline-3,1'-cyclohexan]-1 -yl, spiro[piperidine-4,1'-benzo [c]thiophen]-1-yl, spiro[piperidine-4, 1'-benzo[c]f u ran]-1-yl, spiro[piperidine-4,3'-benzo[b] furan]-1-yl, spiro[piperidine-4,3'-coumarin]-1-yl, and the like. 30 The term "heteroarylcarbonyl" as used herein refers to the radical heteroaryl-C(=O)-. Representative examples are pyridinylcarbonyl (e.g., pyridin-2-ylcarbonyl and pyridin-4 ylcarbonyl), quinolinylcarbonyl (e.g., 2-(quinolin-2-yl)carbonyl and 1-(quinolin-2-yl)carbonyl), imidazolylcarbonyl (e.g., imidazol-2-ylcarbonyl and imidazol-5-ylcarbonyl), and the like. The term "heteroarylcarbonylamino" as used herein, refers to the radical heteroaryl 35 C(=O)-NH-. Representative examples are pyridinylcarbonylamino (e.g., pyridin-2-ylcarbonyl- 9 amino and pyridin-4-ylcarbonylamino), quinolinylcarbonylamino (e.g., 2-(quinolin-2-yl) carbonylamino and 1-(quinolin-2-yl)carbonylamino), and the like. The term "heteroarylcarbonylamino-C, 6 -alkyl" as used herein, refers to C 6 -alkyl substituted at any carbon atom with heteroarylcarbonylamino. Representative examples are 5 pyridinylcarbonylaminomethyl (e.g., pyridin-2-ylcarbonylaminomethyl and pyridin-4-yl carbonylaminomethyl), 2-(quinolinylcarbonylamino)ethyl (e.g., 2-(2-(quinolin-2-yI)carbonyl amino)ethyl and 2-(1-(quinolin-2-yl)carbonylamino)ethyl), and the like. The term "heterocyclyl" as used herein represents a saturated 3 to 8 membered monocyclic ring, containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, 10 S(=O) and S(=0) 2 . Representative examples are aziridinyl (e.g., aziridin-1-yl), azetidinyl (e.g., azetidin-1 -yl and azetidin-3-yl), oxetanyl, pyrrolidinyl (e.g., pyrrolidin-1 -yl, pyrrolidin-2-yl and pyrrolidin-3-yl), 2-oxo-pyrrolidin-1 -yl, 2,5-dioxo-pyrrolidin-1 -yl, imidazolidinyl (e.g., imida zolidin-1 -yl, imidazolidin-2-yl and imidazolidin-4-yl), 2,4-dioxo-imidazolidin-3-y, 2,4-dioxo-1 methylimidazolidin-3-yl, 2,4-dioxo-1 ,5,5-trimethylimidazolidin-3-yl, 2,4-dioxo-5,5-dimethyl 15 imidazolidin-3-yl, oxazolidinyl (e.g., oxazolidin-2-yl, oxazolidin-3-yl and oxazolidin-4-yl), 2 oxo-oxazolidin-3-yl, thiazolidinyl (e.g., thiazolidin-2-yl, thiazolidin-3-yl and thiazolidin-4-y), 2,4-dioxo-thiazolidin-3-yl, isothiazolidinyl, 1,1-dioxo-isothiazolidin-2-yl, 1,1-dioxo-[1,2,5]thia diazolidin-2-yl, piperidinyl (e.g., piperidin-1 -yl, piperidin-2-yl, piperidin-3-yl and piperidin-4-y), 2-oxo-piperidin-1 -yl, 2,6-dioxo-piperidin-1 -yl, homopiperidinyl (e.g., homopiperidin-1 -yl, ho 20 mopiperidin-2-yl, homopiperidin-3-yl and homopiperidin-4-yl), piperazinyl (e.g., piperazin-1 -yl and piperazin-2-yl), morpholinyl (e.g., morpholin-2-yl, morpholin-3-yl and morpholin-4-yl), 2 oxo-[1,3]oxazinan-3-yl, thiomorpholinyl (e.g., thiomorpholin-2-yl, thiomorpholin-3-yl and thio morpholin-4-yl), 1 -oxo-thiomorpholinyl, 1,1 -dioxo-thiomorpholinyl, tetrahydrofuranyl (e.g., tet rahydrofuran-2-yl and tetrahydrofuran-3-yl), tetrahydrothienyl, tetrahydro-1,1-dioxothienyl, 25 tetrahydropyranyl (e.g., 2-tetrahydropyranyl), tetrahydrothiopyranyl (e.g., 2-tetrahydrothio pyranyl), 1,4-dioxanyl, 1,3-dioxanyl, and the like. Heterocyclyl is also intended to represent a saturated 6 to 12 membered bicyclic ring containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 . Representative examples are octahydroindolyl (e.g., octahydroindol-1 -yl, octahydroindol-2-yl, octahydroindol-3-yl and octahydroindol-5-yl), 30 decahydroquinolinyl (e.g., decahydroquinolin-1 -yl, decahydroquinolin-2-yl, decahydroquino lin-3-yl, decahydroquinolin-4-yl and decahydroquinolin-6-yl), decahydroquinoxalinyl (e.g., decahydroquinoxalin-1 -yl, decahydroquinoxalin-2-yl and decahydroquinoxalin-6-yl) and the like. Heterocyclyl is also intended to represent a saturated 6 tol 2 membered ring containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 and hav 35 ing one or two bridges. Representative examples are 3-azabicyclo[3.2.2]nonyl, 2-azabicycle- 10 [2.2.1]heptyl, 3-azabicyclo[3.1.0]hexyl, 2,5-diazabicyclo[2.2.1]heptyl, atropinyl, tropinyl, quinuclidinyl, 1,4-diazabicyclo[2.2.2]octanyl, and the like. Heterocyclyl is also intended to rep resent a 6 to 12 membered saturated ring containing one or more heteroatoms selected from nitrogen, oxygen, sulfur, S(=O) and S(=0) 2 and containing one or more spiro atoms. Repre 5 sentative examples are 1,4-dioxaspiro(4.5]decanyl (e.g., 1,4-dioxaspiro[4.5]decan-2-yl and 1,4-dioxaspiro[4.5]decan-7-yl), 1,4-dioxa-8-azaspiro[4.5]decanyl (e.g., 1,4-dioxa-8-azaspiro [4.5]decan-2-yl and 1,4-dioxa-8-azaspiro[4.5]decan-8-yl), 8-azaspiro[4.5]decanyl (e.g., 8-aza spiro[4.5]decan-1-yl and 8-azaspiro[4.5]decan-8-yl), 2-azaspiro[5.5]undecanyl (e.g., 2-aza spiro[5.5]undecan-2-y), 2,8-diazaspiro[4.5]decanyl (e.g., 2,8-diazaspiro(4.5]decan-2-yl and 10 2,8-diazaspiro[4.5]decan-8-yl), 2,8-diazaspiro(5.5]undecanyl (e.g., 2,8-diazaspiro[5.5] undecan-2-yl), 1,3,8-triazaspiro[4.5]decanyl (e.g., 1,3,8-triazaspiro[4.5]decan-1 -yl and 1,3,8 triazaspiro[4.5]decan-3-yl, 1,3,8-triazaspiro[4.5]decan-8-y), and the like. The term "heterocyclyl-Cr.-alkoxy" as used herein refers to the radical heterocyclyl

C

1 e-alkoxy. Representative examples are piperidin-1-ylmethoxy, 2-(piperidin-1-yl)ethoxy, 3 15 (piperidin-1 -yl)prop-3-oxy, piperazin-1 -ylmethoxy, 2-(piperazin-1 -yl)ethoxy, 3-(piperazin-1 -yl) prop-3-oxy, morpholin-4-ylmethoxy, 2-(morpholin-4-yl)ethoxy, 3-(morpholin-4-yl)prop-3-oxy, and the like. The term "heterocyclyl-C 6 -alkyl" as used herein refers to the radical heterocyclyl

C

16 -alkyl. Representative examples are piperidin-1 -ylmethyl, 2-(piperidin-1 -yl)ethyl, 3 20 hydroxy-3-(piperidin-1 -yl)propyl, piperazin-1 -ylmethyl, 2-(piperazin-1 -yl)ethyl, 3-hydroxy-3 (piperazin-1-yl)propyl, morpholin-4-ylmethyl, 2-(morpholin-4-yl)ethyl, 3-hydroxy-3-(morpholin 4-yl)propyl, and the like. The term "heterocyclylcarbonyl" as used herein refers to the radical heterocyclyl C(=O)-. Representative examples are piperidinylcarbonyl (e.g., piperidin-2-ylcarbonyl, 25 piperidin-3-ylcarbonyl and piperidin-4-ylcarbonyl), piperazinylcarbonyl (e.g., piperazin-1 -yl carbonyl and piperazin-2-ylcarbonyl), and the like. The term "hydroxy-C.

6 -alkyl" as used herein refers to C 1 .e-alkyl substituted one or more times at any carbon atom(s) with hydroxyl. Representative examples are hydroxymethyl, hydoxyethyl (e.g., 1 -hydroxyethyl and 2-hydroxyethyl), and the like. 30 The term "N-(C 16 -alkylcarbonyl)-N-(Cl- 6 -alkyl)amino" as used herein is an amino group with two substituents, i.e., a CI--alkylcarbonyl group and an C 1

-

6 -alkyl group. Analogously, the following terms cover groups wherein an amino group has two substituents:

N-(C

3

.

8 -cycloalkylcarbonyl)-N-(Cl- 6 -alkyl)amino and N-(C 3

.

8 -cycloalkyl-C 1

.

6 -alkylcarbonyl)-N

(C

1 6 -alkyl)amino. Analogously, the following terms cover groups wherein there are two 35 substituents on the nitrogen atom in the amino-Cl- 6 -alkyl moiety: N-(C 1

.

6 -alkylcarbonyl)-N-(C 1

.

11 6 -alkyl)amino-C 1

-

6 -alkyl, N-(C 3

.

8 -cycloalkylcarbonyl)-N-(C 1

.

6 -alkyl)amino-C 1

.

6 -alkyl and N-(C 3

.

8 cycloalkyl-C 1

.

6 -alkylcarbonyl)-N-(C 1

.

6 -alkyl)amino-C 1

.

6 -alkyl. Representative examples are N cyclohexylcarbonyl-N-methylamino, 2-(N-cyclopentylcarbonyl-N-methylamino)ethy and the like. The term "bridge" as used herein represents a connection in a saturated or partly 5 saturated ring between two atoms of such ring that are not neighbors through a chain of 1 to 4 atoms selected from carbon, nitrogen, oxygen and sulfur. Representative examples of such connecting chains are -CH 2 -, -CH 2

CH

2 -, -CH 2

NHCH

2 -, -CH 2

CH

2

CH

2 -, -CH 2 0CH 2 -, and the like. The term "spiro atom" as used herein represents a carbon atom in a saturated or 10 partly saturated ring that connects both ends of a chain of 3 to 8 atoms selected from carbon, nitrogen, oxygen and sulfur. Representative examples are -(CH 2

)

5 -, -(CH 2

)

3 -, -(CH 2

)

4 -,

-CH

2

NHCH

2

CH

2 -, -CH 2

CH

2

NHCH

2

CH

2 -, -CH 2

NHCH

2

CH

2

CH

2 -, -CH 2

CH

2 0CH 2 -, -OCH 2

CH

2 0 ,and the like. The term "optionally substituted" as used herein means that the groups in question 15 are either unsubstituted or substituted with one or more of the substituents specified. When the group(s) in question are substituted with more than one substituent the substituents may be the same or different. Certain of the defined terms may occur more than once in the structural formulae, and upon such occurrence each term shall be defined independently of the other. 20 Certain of the defined terms may occur in combinations, and it is to be understood that the first mentioned radical is a substituent on the subsequently mentioned radical, where the point of substitution, i.e. the point of attachment to another part of the molecule, is on the last mentioned of the radicals. The term "solvate" as used herein is a complex of defined stoichiometry formed by a 25 solute (in casu, a compound according to the present invention) and a solvent. Solvents are those commonly used in the pharmaceutical art, by way of example, water, ethanol, acetic acid, and the like. The term "hydrate" refers to the complex where the solvent molecule is water. The term "treatment" as used herein means the management and care of a patient 30 for the purpose of combating a disease, disorder or condition. The term is intended to include the delaying of the progression of the disease, disorder or condition, the alleviation or relief of symptoms and complications, and/or the cure or elimination of the disease, disorder or condi tion. The patient to be treated is preferably a mammal, in particular a human being. The terms "disease", "condition" and "disorder" as used herein are used 35 interchangeably to specify a state of a patient which is not the normal physiological state of man.

12 The term "medicament" as used herein means a pharmaceutical composition suit able for administration of the pharmaceutically active compound to a patient. The term "prodrug" as used herein includes biohydrolyzable amides and biohydro lyzable esters and also encompasses a) compounds in which the biohydrolyzable functional 5 ity in such a prodrug is encompassed in the compound according to the present invention, and b) compounds which may be oxidized or reduced biologically at a given functional group to yield drug substances according to the present invention. Examples of these functional groups include 1,4-dihydropyridine, N-alkylcarbonyl-1,4-dihydropyridine, 1,4-cyclohexadiene, tert-butyl, and the like. 10 The term "biohydrolyzable ester" as used herein is an ester of a drug substance (in this invention, a compound of formula I) which either a) does not interfere with the biological activity of the parent substance but confers on that substance advantageous properties in vivo such as duration of action, onset of action, and the like, or b) is biologically inactive but is readily converted in vivo by the subject to the biologically active principle. The advantage 15 is that, for example, the biohydrolyzable ester is orally absorbed from the gut and is trans formed to (1) in plasma. Many examples of such are known in the art and include by way of example lower alkyl esters (e.g., C14), lower acyloxyalkyl esters, lower alkoxyacyloxyalkyl esters, alkoxyacyloxy esters, alkyl acylamino alkyl esters, and choline esters. The term "biohydrolyzable amide" as used herein is an amide of a drug substance 20 (in this invention, a compound of general formula 1) which either a) does not interfere with the biological activity of the parent substance but confers on that substance advantageous prop erties in vivo such as duration of action, onset of action, and the like, or b) is biologically inac tive but is readily converted in vivo by the subject to the biologically active principle. The ad vantage is that, for example, the biohydrolyzable amide is orally absorbed from the gut and is 25 transformed to (1) in plasma. Many examples of such are known in the art and include by way of example lower alkyl amides, a-amino acid amides, alkoxyacyl amides, and alkylaminoal kylcarbonyl amides. The term "pharmaceutically acceptable" as used herein means suited for normal pharmaceutical applications, i.e. giving rise to no adverse events in patients etc. 30 The term "effective amount" as used herein means a dosage which is sufficient in order for the treatment of the patient to be effective compared with no treatment. The term "therapeutically effective amount" of a compound as used herein means an amount sufficient to cure, alleviate or partially arrest the clinical manifestations of a given disease and its complications. An amount adequate to accomplish this is defined as "thera 35 peutically effective amount". Effective amounts for each purpose will depend on the severity 13 of the disease or injury as well as the weight and general state of the subject. It will be un derstood that determining an appropriate dosage may be achieved using routine experimen tation, by constructing a matrix of values and testing different points in the matrix, which is all within the ordinary skills of a trained physician or veterinary. 5 The term "metabolite" as used herein is any intermediate or product resulting from metabolism. The term "metabolism" as used herein refer to the biotransformation of a drug sub stance (in this invention, a compound of general formula I) administered to a patient. The representative examples mentioned above are specific embodiments of this in 10 vention. In the examples below, the following terms are intended to have the following, gen eral meanings: d is day(s), g is gram(s), h is hour(s), Hz is hertz, kD is kiloDalton(s), L is li ter(s), M is molar, mbar is millibar, mg is milligram(s), min is minute(s), mL is milliliter(s), mM is millimolar, mmol is millimole(s), mol is mole(s), N is normal, ppm is parts per million, psi is 15 pounds per square inch, APCI is atmospheric pressure chemical ionization, ESI is electros pray ionization, l.v. is intravenous, m/z is mass to charge ratio, mp/Mp is melting point, MS is mass spectrometry, HPLC is high pressure liquid chromatography, RP is reverse phase, HPLC-MS is high pressure liquid chromatography - mass spectrometry, NMR is nuclear magnetic resonance spectroscopy, p.o. is per oral, R is relative TLC mobility, rt is room tem 20 perature, s.c. is subcutaneous, TLC is thin layer chromatography, tr is retention time, BOP is (1-benzotriazolyloxy)tris(dimethylamino)phosphoniumhexafluorophosphate, CDI is carbon yldiimidazole, DCM is dichloromethane, CH 2 Cl 2 is methylenechloride, DIBAL-H is diisobuty laluminiumhydride, DBU is 1,8-diazabicyclo[5.4.0]undec-7-ene, DEAD is diethyl azodicar boxylate, DIC is 1,3-diisopropylcarbodiimide, DIPEA is NN-diisopropylethylamine, DMA is 25 NN-dimethylacetamide, DMF is N,N-dimethylformamide, DMPU is N,N'-dimethylpropylene urea, 1,3-dimethyl-2-oxohexahydropyrimidine, DMSO is dimethylsulf oxide, EDAC is 1-ethyl 3-(3-dimethylaminopropyl)carbodiimide hydrochloride, Et 2 0 is diethyl ether, EtOAc is ethyl acetate, HMPA is hexamethylphosphoric acid triamide, HOAt is 1 -hydroxy-7-azabenzotri azole, HOBt is 1 -hydroxybenzotriazole, LAH is lithium aluminum hydride (LiAIH 4 ), LDA is lith 30 ium diisopropylamide, MeCN is acetonitrile, MeOH is methanol, NMM is N-methylmorpholine (4-methylmorpholine), NMP is N-methylpyrrolidin-2-one, TEA is triethylamine, TFA is tri fluoroacetic acid, THF is tetrahydrofuran, THP is tetrahydropyranyl, TTFH is fluoro-N,N,N',N' tetramethylformamidinium hexafluorophosphate, CDCl 3 is deuterio chloroform, CD 3 OD is tet radeuterio methanol and DMSO-d is hexadeuterio dimethylsulfoxide. 35 14 SUMMARY OF THIS INVENTION The invention relates to compounds of the general formula I specified in the claims below. The compounds of this invention differ structurally from the known compounds. The invention also relates to the use of said compounds in therapy, and in particular 5 to pharmaceutical compositions comprising said compounds. In another embodiment, the invention relates to methods of treatment, the method comprising administering to a subject in need thereof an effective amount of one or more compounds according to formula 1. In a still further embodiment, the invention relates to the use of compounds accord 10 ing to formula I in the manufacture of medicaments. DETAILED DESCRIPTION OF THIS INVENTION Due to their interaction with the histamine H3 receptor, the compounds of this invention as defined in the claims below and elsewhere in this specification are useful in the treatment of 15 a wide range of conditions and disorders in which an interaction with the histamine H3 recep tor is beneficial. Thus, the compounds may find use, e.g., in the treatment of diseases of the central nervous system, the peripheral nervous system, the cardiovascular system, the pul monary system, the gastrointestinal system and the endocrinological system. In an embodiment, this invention relates to a compound of the general formula 1: R W 20 A wherein W, X, Y, Z independent of each other is a moiety of the formula -C(R 2 )= or -N= (i.e. nitrogen), with the proviso that at least one of the symbols W, X, Y or Z must be the moiety N=; R 2 is hydrogen, halogen, cyano, C 1

.

6 -alkyl, C1.

6 -alkoxy, halo-C 1

.

6 -alkyl or halo-C 1

.

6 -alkoxy;

R

1 represents the following possibilities i) and ii): where possibility i) is a group of the general 25 formula -NR 3

R

4 , wherein R 3 is hydrogen, C 1

.

6 -alkyl, C 2

.

6 -alkenyl or C 3

.

8 -cycloalkyl; and R 4 is

C

1

.

6 -alkyl, C 2

.

6 -alkenyl or C3 8 -cycloalkyl, each of which are substituted with a group selected from -NR 5

R

6 and heterocyclyl; Rand R 6 independently represent hydrogen or C 1

.

6 -alkyl; and where posibility ii) is a group of one of the general formulas 11 to VII: 15 1 R \ 8 n N R N N )M N m N )(p NM N IN*N R 10 .N-1 Il IV V

R

1 N ) N VI Vil wherein the star indicates the position of the free bond (and not a methyl group), and wherein m is 0 (zero), 1, 2 or 3; n is 1, 2 or 3; o is 0 (zero), 1, 2, 3 or 4; p is 0 (zero), 1 or 2; q is 1 or 2; 5 Q represents a moiety of the formula -CH 2 -, -0-, -S- or >NR 3 , wherein R 3 is as defined above; R 7 and R 8 independent of each other is hydrogen or Ce 6 -alkyl, or R 7 and R' can to gether with the nitrogen to which they are attached form a heterocyclyl group; R 9 is C 16 -alkyl or C 3

.

8 -cycloalkyl, which both may be substituted with a group of the general formula -NR 7

R

"

, wherein R 7 and Rare as defined above; R' is hydrogen or C 1

.

6 -alkyl; R" is hydrogen, C1.-8 10 alkyl, C3.

8 -alkenyl, C 3

.

8 -alkynyl, C 3

.

8 -cycloalkyl, C 3

-

8 -cycloalkenyl, C 3

.

8 -cycloalkyl-C 3 -alkyl or C3.

8 -cycloalkenyl-C 3 -alkyl, or C 1

.

6 -alkyl or C3- 8 -cycloalkyl, which both are substituted with at least one substituent selected from the group consisting of hydroxy, C 1

.

6 -alkoxy, Ci.

6 -alkyl carbonyl, cyano, -NR 5

R

6 , -C(=O)NR 5

R

6 , arylcarbonyl, heteroarylcarbonyl, C1.

6 -alkylsulfonyl, arylsulfonyl, heterocyclylcarbonyl, Cl -alkoxycarbonyl, aryl-Ca.

6 -alkoxycarbonyl, heteroaryl 15 and heterocyclyl, which heterocyclyl may be substituted with C 16 -alkyl, where applicable; R 5 and R 6 are as defined above; A is aryl or heteroaryl, each of which may optionally be substi tuted with one or more substituents independently selected from R 12 ; R 12 is halogen, hydroxy, cyano, C 1

.

6 -alkyl, C3.

8 -cycloalkyl, halo-C 1 6 -alkyl, C 16 -alkoxy, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkyl sulfonyl, Cl 6 -alkylsulfinyl, -V-(CH 2 )s-(C=0)-NR 3

R

1 4 , C 1

.

6 -alkylcarbonyl, C 1

.

6 -alkoxycarbonyl, 20 C 1 .- alkylcarboxy, cyano-C 1

.

6 -alkyl, hydroxy-Cl 6 -alkyl, C1.

6 -alkoxy-C 6 -alkyl, C, 6 -alkyl carbonylamino, N-(C 1 6 -alkylcarbonyl)-N-(C, 6 -alkyl)amino, C 1 6 -alkylcarbonylamino-C 6 -alky or N-(C 1

.

6 -alkylcarbonyl)-N-(C 6 -alkyl)amino-C 1

.

6 -alkyl; or heterocyclyl-C 1 6 -alkyl, heterocyclyl

C,

6 -alkoxy, heterocyclylcarbonyl, C 3

.

8 -cycloalkylcarbonylamino, N-(C 3

.

8 -cycloalkylcarbonyl) N-(Cl- 6 -alkyl)amino, C3.

8 -cycloalkylcarbonylamino-C 6 -alkyl or N-(C3 8 -cycloalkylcarbonyl)-N 25 (C 16 -alkyl)amino-C--alkyl, C 3

.

8 -cycloalkyl-C 1

.

6 -alkylcarbonylamino, N-(C 3

.

8 -cycloalkyl-C 1

.

6

-

16 alkylcarbonyl)-N-(C 1

.

6 -alkyl)amino, C 3 .- cycloalkyl-C 1

.

6 -alkylcarbonylamino-C 6 -alky or N-(C 3 . 8-cycloalkyl-C 1

-

6 -alkylcarbonyl)-N-(C 1

.

6 -alkyl)amino-C 1

.

6 -alkyl, arylcarbonylamino, aryl-C 1

.

6 alkylcarbonylamino, arylcarbonylamino-C 1

.

6 -alkyl, aryl-C 16 -alkylcarbonylamino-C 1

.

6 -alkyl, heteroarylcarbonylamino or heteroarylcarbonylamino-C 6 -alkyl, wherein each of said aryl, 5 heteroaryl, C 3

.

8 -cycloalkyl and heterocyclyl may optionally be substituted with halogen, hy droxy, cyano, C1 6 -alkyl, C 3

.

8 -cycloalkyl, halo-C 1 6 -alkyl, C 1

.

6 -alkoxy, halo-C 1

.

6 -alkoxy, C1-6 alkylsulfonyl, C, 6 -alkylsulfinyl, C 1

.

6 -alkylcarbonyl, C 1

.

6 -alkoxycarbonyl, C 16 -alkylcarboxy, cya no-C 1

.

6 -alkyl, hydroxy-C 1

.

6 -alkyl or C 1

.

6 -alkoxy-C 1

.

6 -alkyl; or aryl or heteroaryl, each of which may be substituted with halogen, hydroxy, carboxy, nitro, cyano, C 1

.

6 -alkyl, C 3

.

8 -cycloalkyl, 10 C 1 -- alkoxy, C 1 6 -alkylsulfanyl, C1.

6 -alkylsulfonyl, C 1 6 -alkylcarbonyl, C1.

6 -alkylcarbonylamino,

C

1

.

6 -alkylcarbonylamino-C 1

.

6 -alkyl, C 1

.

6 -alkoxycarbonyl, Cl 6 -alkylcarboxy, halo-C 1

.

6 -alkyl, halo-C 1

.

6 -alkoxy, hydroxy-C 1 6 -alkyl, C 1 .s-alkoxy-C 1

.

6 -alkyl, aryl, arylcarbonylamino, aryl carbonylamino-C 6 -alkyl, heteroaryl, heteroarylcarbonylamino, heteroarylcarbonylamino-C.

6 alkyl or -(CH 2 )s-(C=O),-NR 13

R

1 4 ; r is 0 (zero) or 1; s is 0 (zero), 1, 2 or 3; V represents a bond 15 or moiety of the formula, -0-, -S- or >NR 3 , wherein R 3 is as defined above; R 1 is hydrogen,

C

16 -alkyl, C 3

-

8 -cycloalkyl or C 1

.

6 -alkylcarbonyl; R 1 4 is hydrogen, C 1

.

6 -alkyl or C 3

.

8 -cycloalkyl with the proviso that R 14 is hydrogen when R 13 is C 1

.

6 -alkylcarbonyl; or R 3 and R 14 can together with the attached nitrogen form a heterocyclyl group; and pharmaceutically acceptable salts and solvates thereof; with the following provisos a) through g): a) when R 1 is 20 a group of the formula VI; W is -N=; X, Y and Z is each a moiety of the general formula C(R 2 )=; wherein R 2 is as defined above; then A cannot be imidazolyl; b) when R 1 is a group of the formula VI; q is 1; X is -C(R 2 )=; R" is branched C 4

.

6 -alkyl, branched C 4

.

6 -alkenyl, branched C 4

.

6 -alkynyl, C3.

5 -cycloalkyl, C 3

.

7 -cycloalkenyl, C 3

.

6 -cycloalkyl-Cl.

3 -alkyl or C3.6 cycloalkenyl-C 3 -alkyl; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein 25 R 2 is as defined above; then R 12 can not be halogen, hydroxy, trifluoromethyl, trifluoro methoxy, C 16 -alkoxy , C1.

6 -alkyl, C 1

.

6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -V-(CH 2 )s-(C=0)-NR R , wherein V is a bond, wherein r and s each is 0 (zero), and R' 3 and R1 4 each is hydrogen or C 16 -alkyl; c) when R 1 is a group of the formula VII; m is 1, 2 or 3; X is a moiety of the formula -C(R 2 )=; and W, Y, Z is each a moiety of the 30 formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R 12 can not be halogen, hy droxy, trifluoromethyl, trifluoromethoxy, C 16 -alkoxy, C1.

6 -alkyl, C 1

.

6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -V-(CH 2 )s-(C=O)r-NR R", wherein V is a bond, r and s each is 0 (zero), and R1 3 and R 14 each is hydrogen or C 1 .e-alkyl; d) when R 1 is a group of the formula VI; q is 1; R" is ethyl, n-propyl or isopropyl; Y and Z is each -N=; X is a 35 moiety of the formula -C(R 2 )=, and W is a moiety of the formula -C(R 2 )= or -N=; wherein R 2 17 is as defined above; then R 12 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy,

C

1

.

6 -alkoxy, C1.

6 -alkyl, C 16 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=0)-NR R' 4 , wherein r and s each is 0 (zero), and R 1 and R 14 each is hydrogen or C 6 -alkyl; e) when R 1 is a group of the formula VII; m is 1, 2 or 3; Y and Z is 5 each -N=; X is a moiety of the formula -C(R 2 )=; and W is a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R 12 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C 1

.

6 -alkoxy, CI- 6 -alkyl, Cl 6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cyclo alkyl or a group of the formula -(CH 2 )s-(C=O)r-NR R' 4 , wherein r and s each is 0 (zero), and

R

13 and R 14 each is hydrogen or C 1 .e-alkyl; f) when R' is formula VI, q is 1, X and W is each a 10 moiety of the general formula -C(R 2 )=, wherein R 2 is as defined above, Y and Z is each -N=, R" is isopropyl, and A is phenyl, then R 12 can not be fluoro, bromo, iodo, hydroxy, trifluoro methoxy, C 2

.

6 -alkoxy, C 1 e-alkyl, C 2

.

6 -alkylsulfanyl, C 2

.

6 -alkylsulfinyl, C2.

6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=O)r-NRR' 4 , wherein r and s each is 0 (zero), and R 13 and R 1 4 each is hydrogen or C 16 -alkyl; and g) when X and Z 15 is each -C(R 2 )=; and one or both of W and Y are -N=; then R 1 cannot be a group of the for mula 11, wherein m is 2. In an embodiment, this invention relates to a compound of the general formula I, to the extent possible according to claim 1: R W Z A 20 wherein W, X, Y, Z independent of each other is a moiety of the formula -C(R 2 )= or -N= (i.e. nitrogen), with the proviso that at least one of the symbols W, X, Y or Z must be the moiety N=; R 2 is hydrogen, halogen, cyano, C1.

6 -alkyl, C 1 .- alkoxy, halo-C 1

.

6 -alkyl or halo-C 1

.

6 -alkoxy; R' represents the following possibilities i) and ii): where possibility i) is a group of the general formula -NR 3

R

4 , wherein R 3 is hydrogen, C 16 -alkyl, C 2

.

6 -alkenyl or C 3

.

8 -cycloalkyl; and R 4 is 25 C 1

.

6 -alkyl, C2.-alkenyl or C 3

.

8 -cycloalkyl, each of which are substituted with a group selected from -NR 5

R

6 and heterocyclyl; R 5 and R 6 independently represent hydrogen or C 1

.

6 -alkyl; and possibility ii) is a group of one of the general formulas 11 to VII: 18 \I )n I~ N N R )o R N Rm ) m ) m:1 ~~fl1 ( )p p b N NN* N 1-*R 10oN Il Ill IV V

R

1 N ))q N q N VI VII wherein the star indicates the position of the free bond (and not a methyl group), and wherein m is 0 (zero), 1, 2 or 3; n is 1, 2 or 3; o is 0 (zero), 1, 2, 3 or 4; p is 0 (zero), 1 or 2; q is 1 or 2; 5 Q represents a moiety of the formula -CH 2 - , -0-, -S- or >NR 3 , wherein R 3 is as defined above; R 7 and R i ndependent of each other is hydrogen or C 1

.

6 -alkyl, or R 7 and R" can to gether with the nitrogen to which they are attached form a heterocyclyl group; R' is Cl.

6 -alkyl or C 3

.

8 -cycloalkyl, which both may be substituted with a group of the general formula -NR R , wherein R 7 and R 8 are as defined above; R 10 is hydrogen or C 1

.

6 -alkyl; R 11 is hydrogen, C1_ 10 alkyl, C 38 -alkenyl, C 3

-

8 -alkynyl, C 3

.

8 -cycloalkyl, C 3

.

8 -cycloalkenyl, C 3

.

8 -cycloalkyl-C 1 s-alkyl or

C

3

.

8 -cycloalkenyl-C 1 3 -alkyl, or C, 6 -alkyl or C 3 .- cycloalkyl, which both are substituted with at least one substituent selected from the group consisting of hydroxy, C 16 -alkoxy, C 1

.

6 -alkyl carbonyl, cyano, -NR 5 R', -C(=0)NR 5 Rr, arylcarbonyl, heteroarylcarbonyl, C 6 -alkylsulfonyl, arylsulfonyl, heterocyclylcarbonyl, C 16 -alkoxycarbonyl, aryl-C 6 -alkoxycarbonyl, heteroaryl 15 and heterocyclyl, which heterocyclyl may be substituted with C 1

.

6 -alkyl, where applicable; R 5 and R' are as defined above; A is aryl or heteroaryl, each of which may optionally be substi tuted with one or more substituents independently selected from R 12 ; R1 2 is halogen, hydroxy, cyano, C 1 .6-alkyl, C 3

.

8 -cycloalkyl, halo-C 6 -alkyl, C1.

6 -alkoxy, halo-C 6 -alkoxy, C 16 -alkyl sulfonyl, C 16 -alkylsulfinyl, -(CH 2 )s-(C=0)-NR 13

R

14 , C 1 6 -alkylcarbonyl, Cl 6 -alkoxycarbonyl, Cj 20 6 -alkylcarboxy, cyano-C 1

.

6 -alkyl, hydroxy-C 1 6 -alkyl, C 16 -alkoxy-C 16 -alkyl, C1.

6 -alkylcarbonyl amino or C 1

.

6 -alkylcarbonylamino-C 6 -alkyl; or heterocyclyl-Cl- 6 -alkyl, heterocyclyl-C 1 6 alkoxy, heterocyclylcarbonyl, arylcarbonylamino, arylcarbonylamino-C 1

.

6 -alkyl, heteroaryl carbonylamino or heteroarylcarbonylamino-C.-alkyl, wherein each of said aryl, heteroaryl and heterocyclyl may optionally be substituted with halogen, hydroxy, cyano, C1.

6 alkyl, C3.8- 19 cycloalkyl, halo-C 1

.

6 -alkyl, C 1 .e-alkoxy, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkylsulfonyl, C1.

6 -alkylsulfinyl,

C

1 .- alkylcarbonyl, C 1

.

6 -alkoxycarbonyl, C1.

6 -alkylcarboxy, cyano-C 1

.

6 -alkyl, hydroxy-C-alkyl or C 1

.

6 -alkoxy-C 1

.

6 -alkyl; or aryl or heteroaryl, each of which may be substituted with halogen, hydroxy, carboxy, nitro, cyano, C1.

6 -alkyl, C 3

.

8 -cycloalkyl, C 16 -alkoxy, C 1 .e-alkylsulfanyl, Cj 5 6 -alkylsulfonyl, C 1

.

6 -alkylcarbonyl, C 1 .- alkylcarbonylamino, Cl.

6 -alkylcarbonylamino-C 1

.

6 -alkyl,

C

1

.

6 -alkoxycarbonyl, C 1

.

6 -alkylcarboxy, halo-C1, 5 -alkyl, halo-C 1

.

6 -alkoxy, hydroxy-C 1

.

6 -alkyl, C1. 6 -alkoxy-C1.

6 -alkyl, aryl, arylcarbonylamino, arylcarbonylamino-C.

6 -alkyl, heteroaryl, hetero arylcarbonylamino, heteroarylcarbonylamino-C 1

.

6 -alky or -(CH 2 )s-(C=O),-NR1 3

R'

4 ; r is 0 (zero) or 1; s is 0 (zero), 1, 2 or 3; R1 3 is hydrogen, C 1

.

6 -alkyl, C 3

-

8 -cycloalkyl or C1.

6 -alkyl 10 carbonyl; R' 4 is hydrogen, C 1

.

6 -alkyl or C 3

.

8 -cycloalkyl with the proviso that R1 4 is hydrogen when R 1 3 is C,.s-alkylcarbonyl; or R1 3 and R' 4 can together with the attached nitrogen form a heterocyclyl group; and pharmaceutically acceptable salts and solvates thereof; with the fol lowing provisos a) through g): a) when R' is a group of the formula VI; W is -N=; X, Y and Z is each a moiety of the general formula -C(R 2 )=; wherein R 2 is as defined above; then A 15 cannot be imidazolyl; b) when R' is a group of the formula VI; q is 1; X is -C(R 2 )=; R" is branched C 4

.

6 -alkyl, branched C 4

.

6 -alkenyl, branched C 4

.

6 -alkynyl, C 3

.

5 -cycloalkyl, C 3

.

7 -cyclo alkenyl, C 3

.

6 -cycloalkyl-Ca.

3 -alkyl or C 3

.

6 -cycloalkenyl-C1.

3 -alkyl; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R1 2 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C1.

6 -alkoxy , C1.

6 -alkyl, C1.

6 -alkylsulfonyl, cyano, 20 aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=0)r-NRR' 4 , wherein r and s each is 0 (zero), and R 1 3 and R ' 4 each is hydrogen or C1.

6 -alkyl; c) when R' is a group of the formula VII; m is 1, 2 or 3; X is a moiety of the formula -C(R 2 )=; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R1 2 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C, 6 -alkoxy, C, 6 -alkyl, C1.

6 -alkylsulfonyl, 25 cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=O)r-NR R 4 wherein r and s each is 0 (zero), and R 1 3 and R1 4 each is hydrogen or C,.

6 -alkyl; d) when R' is a group of the formula VI; q is 1; R" is ethyl, n-propyl or isopropyl; Y and Z is each -N=; X is a moiety of the formula -C(R 2 )=, and W is a moiety of the formula -C(R 2 )= or -N=; wherein

R

2 is as defined above; then R 1 2 can not be halogen, hydroxy, trifluoromethyl, trifluorometh 30 oxy, C1.

6 -alkoxy, C, 6 -alkyl, C, 6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

-

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=0)r-NR R 4 , wherein r and s each is 0 (zero), and R 3 and R 1 4 each is hydrogen or C, 6 -alkyl; e) when R' is a group of the formula VII; m is 1, 2 or 3; Y and Z is each -N=; X is a moiety of the formula -C(R 2 )=; and W is a moiety of the formula C(R2)= or -N=; wherein R 2 is as defined above; then R1 2 can not be halogen, hydroxy, tri 35 fluoromethyl, trifluoromethoxy, Cl 6 -alkoxy, C, 6 -alkyl, Cl 6 -alkylsulfonyl, cyano, aryl, hetero- 20 aryl, C 3

-

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=O),-NR R , wherein r and s each is 0 (zero), and R 13 and R 1 4 each is hydrogen or C 1

.

6 -alkyl; f) when R 1 is formula VI, q is 1, X and W is each a moiety of the general formula -C(R 2 )=, wherein R 2 is as defined above, Y and Z is each -N=, R" is isopropyl, and A is phenyl, then R 12 can not be fluoro, bromo, iodo, 5 hydroxy, trifluoromethoxy, C 2

-

6 -alkoxy, C 1

.

6 -alkyl, C 2

-

6 -alkylsulfanyl, C 2

-

6 -alkylsulfinyl, C 2 s alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=O)r

NR

3

R

14 , wherein r and s each is 0 (zero), and R 13 and R 1 4 each is hydrogen or C 1

.

6 -alkyl; and g) when X and Z is each -C(R 2 )=; and one or both of W and Y are -N=; then R' cannot be a group of the formula 11, wherein m is 2. 10 In an embodiment of this invention, it relates to compounds wherein W is -N=; and X, Y and Z each is a moiety of the general formula -C(R 2 )=, wherein R 2 is as defined herein; such compounds having the general formula 1-2: R N R 2 1-2 2A R2 wherein A and R 1 are as defined herein, and the three symbols R 2 are the same or different 15 and each is as defined herein. In an embodiment of this invention, this invention relates to compounds wherein W and Y each is -N=; and X and Z each is a moiety of the general formula -C(R 2 )=, wherein R 2 is as defined herein; such compounds having the general formula 1-3: R N R 2 1-3 N / A

R

2 20 wherein A and R 1 are as defined herein, and the two symbols R 2 are the same or different and each is as defined herein. In an embodiment of this invention, this invention relates to compounds wherein W and X each is -N=; and Y and Z each is a moiety of the general formula -C(R 2 )=, wherein R 2 is as defined herein; such compounds having the general formula 1-4: NZ N 1-4 R 21 A 2 25 R 21 wherein A and R' are as defined herein, and the two symbols R 2 are the same or different and each is as defined herein. In an embodiment of this invention, this invention relates to compounds wherein W and Z each is -N=; and X and Y each is a moiety of the general formula -C(R 2 )=, wherein R 2 is 5 as defined herein; such compounds having the general formula 1-5: 1-5 R N A wherein A and R' are as defined herein, and the two symbols R 2 are the same or different and each is as defined herein. In an embodiment of this invention, this invention relates to compounds having one of 10 the general formulas 1-6a, l-6b or l-6c: R7 R 9 RN R'N N N ( )m P N W N W1O/ W Z A z A A I-6a I- 6b I- 6c wherein A, m, o, p, R 7 , R 8 , R 9 , R 10 , W, X, Y, and Z each is as defined herein. In an embodiment of this invention, this invention relates to compounds having one of 15 the general formulas 1-7a or I-7b: R N q N N W XI Z A Z A - 7a I- 7b wherein W, X, Y, Z, m, q, R", and A each is as defined herein. In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-8: 22 R N N A 1-8 wherein q, R", and A each is as defined herein. In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-9: N q N XA 51-9 wherein q, R", and A each is as defined herein. In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-10: N N A - 10 10 wherein q, R", and A each is as defined herein. In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-11: RlKN -) q N N N N NA I - 11 wherein q, R", and A each is as defined herein.

23 In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-12: C n N b) M A -12 wherein Q, n, m, and A each is as defined herein. 5 In an embodiment of this invention, this invention relates to compounds having the gen eral formula 1-13: Cn N ) M N A 1 -13 wherein Q, m, n, and A each is as defined herein. In an embodiment of this invention, this invention relates to compounds having the gen 10 eral formula 1-14: R9 N ( m R N A I - 14 wherein m, R 9 , R' , and A each is as defined herein. In an embodiment of this invention, A is aryl, 2-pyridyl, 3-pyridyl or 4-pyridyl.

24 In an embodiment of this invention, A is phenyl, benzofuranyl, benzodioxinyl, benzo dioxolyl, benzoxazinyl, dihydrobenzodioxinyl, indolyl, pyrazinyl, pyridinyl, oxadiazolyl, quinolyl or thienyl. In an embodiment of this invention, Q is -CH 2 - or -0-. 5 In an embodiment of this invention, W is nitrogen (-N=). In an embodiment of this invention, W is a group of the general formula -C(R 2 )=, wherein R 2 is hydrogen, i.e., carbon (-CH=). In an embodiment of this invention, X is nitrogen. In an embodiment of this invention, X is carbon (-CH=). 10 In an embodiment of this invention, X is nitrogen (-N=) or carbon (-CH=). In an embodiment of this invention, Y is nitrogen. In an embodiment of this invention, Y is carbon (-CH=). In an embodiment of this invention, Y is nitrogen (-N=) or carbon (-CH=). In an embodiment of this invention, Z is nitrogen. 15 In an embodiment of this invention, Z is carbon (-CH=). In an embodiment of this invention, Z is nitrogen (-N=) or carbon (-CH=). In an embodiment of this invention, W and Y are each nitrogen. In an embodiment of this invention, W and X are each nitrogen. In an embodiment of this invention, W and Z are each nitrogen. 20 In an embodiment of this invention, one or two of the symbols W, X, Y and Z is nitro gen (-N=) and the remaining are a group of the general formula -C(R 2 )=, wherein R 2 is as de fiend herein. In an embodiment of this invention, the aromatic, divalent, 6-membered ring contain ing the symbols W, X, Y and Z is pyridine, pyridazine, pyrimidine or pyrazine from which hy 25 drogen is removed from two opposite carbon atoms (para position in relation to each other). In an embodiment of this invention, R' is a group of formula 11 C?>n N wherein m, n and Q each is as defined in the claims below. In an embodiment of this invention, R' is a group of formula Ill 25 R7 R 8.-1N )o )m N wherein m, o, p, R 7 and R 8 each is as defined in the claims below. In an embodiment of this invention, R' is a group of formula Ill wherein m is 0, 1 or 2, o is 0, 1 or 2, p is 1 or 2, and R 7 and R 8 are each hydrogen or R 7 and Ra form together with 5 the nitrogen atom to which they are attached a pyrrolidinyl or piperidinyl group. In an embodiment of this invention, R' is a group of formula IV R 9 N RN N IV wherein R' is as defined in the claims below. In an embodiment of this invention, R 1 is a group of formula V R N V 10 wherein m, R 9 and R 10 each is as defined in the claims below. In an embodiment of this invention, R' is a group of formula V wherein m is 2, R 9 is C 1 . 6 -alkyl, and R 10 is hydrogen. In an embodiment of this invention, R' is a group of formula VI R N ) q N 15

YI

26 wherein q and R" each is as defined in the claims below. In an embodiment of this invention, R' is a group of formula VI wherein R" is hydro gen, C 1

.

8 -alkyl, C 3

-

8 -alkenyl, C 3

-

8 -cycloalkyl, heterocyclyl, C 1

.

8 -alkyl substituted by C 1

.

6 -alkoxy, by cyano or by C 1

.

6 -alkylcarbonyl or by piperidinyl which optionally is substituted by C 1

.

6 -alkyl, 5 R 5 R'N- wherein R 5 and R 6 are each 1-6-alkyl, or R 5

R

6 N-C(=O)- wherein R' and R 6 are each C1.r-alkyl. In an embodiment of this invention, heterocyclyl is tetrahydropyranyl. In an embodiment of this invention, R 1 is a group of formula VI wherein R" is hydro gen, methyl, isopropyl, propyl, cyclopentyl, cyclohexyl, propenyl, methoxyethyl, cyanoethyl, 10 piperidinylpropyl, N-methylpiperidinylmethyl, methylcarbonylmethyl, N,N-dimethylaminoethyl, N,N-dimethylaminopropyl, N,N-diethylaminoethyl, N,N-dimethylaminocarbonylmethyl or tetra hydropyranyl. In an embodiment of this invention, R' is a group of formula VII ) rn N Nl Vil 15 wherein m is as defined in the claims below. In an embodiment of this invention, R1 is a group of formula VII wherein m is 2. In an embodiment of this invention, R' is piperazinyl, piperidinyl, pyrrolidinyl, piperid inylamino or diazepanyl. In an embodiment of this invention, R 2 is hydrogen, C 1

.

6 -alkyl or halogen. 20 In an embodiment of this invention, R 2 is hydrogen, methyl or isopropyl. In an embodiment of this invention, R 2 is hydrogen or C 1

.

6 -alkyl. In an embodiment of this invention, R 7 is hydrogen or C 1

.

6 -alkyl. In an embodiment of this invention, R 8 is hydrogen or C1.

6 -alkyl. In an embodiment of this invention, R 7 and R" together with the nitrogen to which they 25 are attached form a heterocyclyl group. In an embodiment of this invention, R 9 is C 1

.

6 -alkyl. In an embodiment of this invention, R 9 is pentyl, more preferred pent-3-yl. In an embodiment of this invention, R'" is hydrogen or C 1

.

6 -alkyl. In an embodiment of this invention, R 1 0 is hydrogen.

27 In an embodiment of this invention, R" is hydrogen, C1.

8 -alkyl, C 3

.

8 -alkenyl, C3.8 alkynyl, C 3

.

8 -cycloalkyl, C 3

.

8 -cycloalkenyl, C 3 .3-cycloalkyl-C 3 -alkyl or C 3

-

8 -cycloalkenyl

C

13 -alkyl. In an embodiment of this invention, R" is C 18 -alkyl, C 3

-

8 -cycloalkyl or C 3

.

8 -cycloalkyl 5 C 1

.

3 -alkyl. In an embodiment of this invention, R" is C 3

.

8 -alkyl, C 3

-

8 -cycloalkyl or C3- 8 -cycloalkyl

C

13 -alkyl. In an embodiment of this invention, R" is C 16 -alkyl or C3- 8 -cycloalkyl, which both are substituted with at least one substituent selected from the group consisting of hydroxy, C 1 6 10 alkoxy, C 1 .- alkylcarbonyl, cyano, -NR 5

R

6 , -C(=O)NR 5

R

6 , arylcarbonyl, heteroarylcarbonyl,

C

16 -alkylsulfonyl, arylsulfonyl, heterocyclylcarbonyl, C 16 -alkoxycarbonyl, aryl-C 16 -alkoxy carbonyl, heteroaryl and heterocyclyl, which heterocyclyl may be substituted with C 16 -alkyl, where applicable; and R 5 and R 6 are as defined herein. In an embodiment of this invention, R" cannot be hydrogen. 15 In an embodiment of this invention, R" is hydrogen, C 1

.

8 -alkyl, C 3

.

8 -alkenyl or C 3

.

8 cycloalkyl or C 1

.

6 -alkyl which is substituted with at least one substituent selected from the group consisting of C 1

.

6 -alkoxy, C 1

.

6 -alkylcarbonyl, cyano, -NR 5

R

6 , -C(=O)NR 5 R6 and hetero cyclyl, which heterocyclyl may be substituted with C 16 -alkyl; and R 5 and R 6 are each Cje alkyl. 20 In an embodiment of this invention, R" is piperidinylpropyl, N,N-dimethylaminopropyl, N-methylpiperidinylmethyl, methyl, N,N-dimethylaminoethyl, tetrahydropyranyl, hydrogen, pro pyl, cyclohexyl, methylcarbonylmethyl, N,N-dimethylaminocarbonylmethyl, cyanoethyl; N,N-di ethylaminoethyl, methoxyethyl, propenyl, cyclobutyl, cyclopentyl, cyclopropyl, cyclopropyl methyl, ethyl, hydrogen or isopropyl. 25 In an embodiment of this invention, the heterocyclyl group is piperidinyl. In an embodiment of this invention, R 12 is halogen, cyano, C 16 -alkyl, C 3

.

8 -cycloalkyl, halo-C 1

.

6 -alkyl, C1 6 -alkoxy, halo-C 6 -alkoxy, C 1

.

6 -alkylsulfonyl, C 16 -alkylsulfinyl, -(CH 2 )s (C=0)-NR 1

R

14 , heterocyclyl-C 1

.

6 -alkyl, heterocyclyl-C 1 6 -alkoxy, heterocyclylcarbonyl, C1 alkylcarbonyl, C 1

.

6 -alkoxycarbonyl, C 16 -alkylcarboxy, cyano-C 1

.

6 -alkyl, C 16 -alkylcarbonyl 30 amino, Cl.-alkylcarbonylamino-C1.

6 -alkyl, arylcarbonylamino, arylcarbonylamino-Cl- 6 -alkyl, heteroarylcarbonylamino or heteroarylcarbonylamino-C 6 -alkyl. In an embodiment of this invention, R 12 is aryl or heteroaryl, each of which may be substituted with halogen, cyano, C 1

.

6 -alkyl, C 3

.

8 -cycloalkyl, C 16 -alkoxy, C 1 e-alkylsulfanyl, C 6 -alkylsulfonyl, C, 6 -alkylcarbonyl, C 1

.

6 -alkylcarbonylamino, C 16 -alkoxycarbonyl, C 16 -alkyl- 28 carboxy, halo-C 1

.

6 -alkyl, halo-C 1 6 -alkoxy, Cl- 6 -alkoxy-C, 6 -alkyl, aryl, arylcarbonylamino, het eroaryl, heteroarylcarbonylamino or -(CH 2 )-(C=O)r-NR R 4 . In an embodiment of this invention, R 1 2 is halogen, hydroxy, cyano, C 1 .- alkyl, C3 cycloalkyl, halo-C 6 -alkyl, C 16 -alkoxy, halo-C 1 6 -alkoxy, C 16 -alkylsulfonyl, C1.

6 -alkylsulfinyl, 5 (CH 2 )-(C=O)r-NR 1 3

R

14 , C 16 -alkylcarbonyl, C 16 -alkoxycarbonyl, C1.

6 -alkylcarboxy, cyano-C .6 alkyl, hydroxy-C 1

.

6 -alkyl, C1.

6 -alkoxy-C 1 6 -alkyl, C1.

6 -alkylcarbonylamino or C1.6-alkylcarbonyl amino-C 6 -alkyl. In an embodiment of this invention, R 12 is heterocyclyl-C.

6 -alkyl, heterocyclyl-C 6 -alkoxy, heterocyclylcarbonyl, arylcarbonylamino, arylcarbonylamino-C- 6 -alkyl, heteroaryl 10 carbonylamino or heteroarylcarbonylamino-C 1

.

6 -alkyl, wherein each said aryl, heteroaryl and heterocyclyl may optionally be substituted with halogen, hydroxy, cyano, C 16 -alkyl, C3.8 cycloalkyl, halo-C 1 6 -alkyl, C 16 -alkoxy, halo-C 16 -alkoxy, C 16 -alkylsulfonyl, C 1

.

6 -alkylsulfinyl,

C

16 .- alkylcarbonyl, Cl 6 -alkoxycarbonyl, C 1

.

6 -alkylcarboxy, cyano-C 6 -alkyl, hydroxy-Ce-alkyl or C 1

.

6 -alkoxy-Cl.

6 -alkyl. 15 In an embodiment of this invention, R" is aryl or heteroaryl, each of which may be substituted with halogen, hydroxy, carboxy, nitro, cyano, C 1

.

6 -alkyl, C 3

.

8 -cycloalkyl, C1_6 alkoxy, C 1

.

6 -alkylsulfanyl, C 1

.

6 -alkylsulfonyl, C 1

.

6 -alkylcarbonyl, C 16 -alkylcarbonylamino, C- 6 alkylcarbonylamino-C 6 -alkyl, C 16 -alkoxycarbonyl, C 16 -alkylcarboxy, halo-C 6 -alkyl, halo-C 6 -alkoxy, hydroxy-C 1 .e-alkyl, Cl.

6 -alkoxy-C 1

.

6 -alkyl, aryl, arylcarbonylamino, arylcarbonyl 20 amino-C.

6 -alkyl, heteroaryl, heteroarylcarbonylamino, heteroarylcarbonylamino-Cl.

6 -alky or (CH 2 )s-(C=O)r-NR R 4 . In an embodiment of this invention, R 12 is halogen, hydroxy, cyano, C 1 6 -alkyl, C3.-8 cycloalkyl, halo-C 1 6 -alkyl, Cl 6 -alkoxy, halo-C 1 6 -alkoxy, C 16 -alkylsulfanyl, C 16 -alkylsulfonyl,

C

1

.

6 -alkylsulfinyl, -V-(CH 2 )s-(C=0)-NR 13

R

14 , C 1

.

6 -alkoxycarbonyl, cyano-C 6 -alkyl, C 6 -alkyl 25 carbonylamino, N-(C 1

.

6 -alkylcarbonyl)-N-(Cl.

6 -alkyl)amino, C1.

6 -alkylcarbonylamino-C 1

.

6 -alkyl, or heterocyclyl, heterocycly-Cl 6 -alkyl, heterocyclylcarbonyl, C 3 -- cycloalkylcarbonylamino, N

(C

3

.

8 -cycloalkylcarbonyl)-N-(C 1

.

6 -alkyl)amino, C 3

.

8 -cycloalkyl-C 1 .- alkylcarbonylamino or heterocyclylcarbonylamino wherein said heterocyclyl and C 3

.

8 -cycloalkyl, optionally, is substituted by oxo, C 16 -alkyl, C 16 -alkoxy or C 16 -alkoxy-C 1

.

6 -alkyl; or phenyl or heteroaryl 30 substituted by cyano, by halo-C 1

.

6 -alkyl, by C 1

.

6 -alkyl, by halo-C 1

.

6 -alkyl or by -(CH 2 )s-(C=0)r

NR

13

R

4 , wherein s, r, R 1 and R" are as defined above. In an embodiment of this invention, r is 0 or 1, s is 0 or 1, R 13 is hydrogen or C 1

.

6 alkyl, and R 1 4 is hydrogen or C 16 -alkyl, or R 1 3 and R 1 4 form together with the adjacent nitro gen atom a heterocyclyl group, for example, piperidinyl, optionally substituted by aminocar 35 bonyl, and V is a bond.

29 In an embodiment of this invention, heterocyclyl is morpholinyl, piperazinyl, piperidinyl or tetrahydfropyranyl. In an embodiment of this invention, heteroaryl is oxadiazolyl. In an embodiment of this invention, R 12 is methoxy, chloro, fluoro, trifluoromethyl, 5 trifluoromethoxy, acetyl, acetylamino, acetylaminomethyl, cyanomethyl, ethanesulfanyl, butyl sulfanyl, methanesulfonyl, ethanesulfonyl, ethanesulfinyl, methyloxadiazolyl, cyclopropylcarbonylamino, cyclopropylmethylcarbonylamino, methoxycyclohexylcarbonyl amino, morpholinylmethyl, methyloxadiazolyl, chloromethylphenyl, cyanophenyl, cyclopropyl, piperidinylmethylphenyl, aminocarbonylpiperidinylmethylphenyl, N-acetyl-N-methylamino, 10 amino, aminomethyl, cyclohexylcarbonylamino, N-cyclopropylcarbonyl-N-methylamino, cyclohexylcarbonylamino, dimethylaminomethyl, dimethylamino, dimethylaminocarbonyl, (2,2-dimethylpropyl)carbonylaminomethyl, diisopropylaminocarbonyl, 4-(1, 1 dioxoisothiazolidinyl)phenyl, ethoxy, hydroxyl, (4-hydroxymethylpiperidinyl)carbonyl, (4 hydroxymethylpiperidinyl)methyl, isopropylcarbonylaminomethyl, 4-isopropylpiperazinyl, (4 15 methylpiperazinyl)carbonyl, (4-methylpiperazinyl)methyl, (4-methylpiperidinyl)carbonyl, (4 methoxymethylpiperidinyl)carbonyl, methyl, methylamino, morpholinyl, morpholinylcarbonyl, piperidinylmethyl, piperidinyl, piperidinylcarbonyl, piperidinylsulfonyl, tetrahydropyranylcar bonylamino, tert.butylcarbonylamino and tert.butylcarbonylaminomethyl. In an embodiment of this invention, R" is hydrogen or C 16 -alkyl. 20 In an embodiment of this invention, R 14 is hydrogen or C 1

.

5 -alkyl. In an embodiment of this invention, R 13 and R 1 4 together with the attached nitrogen form a heterocyclyl group. In an embodiment of this invention, m is 0, 1 or 2. In an embodiment of this invention, m is 0. 25 In an embodiment of this invention, m is 1 or 2. In an embodiment of this invention, n is 1 or 2. In an embodiment of this invention, o is 1. In an embodiment of this invention, p is 1 or 2. In an embodiment of this invention, m is 0 and p is 2. 30 In an embodiment of this invention, m is 0, p is 2 and o is 1. In an embodiment of this invention, q is 1. In an embodiment of this invention, r is 0 'or 1. In an embodiment of this invention, s is 0 or 1. In an embodiment, this invention relates to compounds wherein A is aryl, 2-pyridyl, 3 35 pyridyl or 4-pyridyl; and/or Q is -CH 2 - or -0-; and/or W is nitrogen; and/or W is a group of the 30 general formula -C(R 2 )=, wherein R 2 is hydrogen; and/or X is nitrogen; and/or X is a group of the general formula -C(R 2 )=, wherein R 2 is hydrogen; and/or Y is nitrogen; and/or Y is a group of the general formula -C(R 2 )=, wherein R 2 is hydrogen; and/or Z is nitrogen; and/or Z is a group of the general formula -C(R 2 )=, wherein R 2 is hydrogen; and/or W and Y is nitrogen; 5 and/or W and X is nitrogen; and/or W and Z is nitrogen; and/or R' is a group of formula il Q CY)n N N 11 wherein m, n and Q each is as defined in the claims below; and/or R' is a group of formula Ill R7 R 811N )0 ) M ()p 0N RI lil wherein m, o, p, R' and R 8 each is as defined in the claims below; and/or R' is a group of 10 formula IV R 9 N N IV wherein R' is as defined in the claims below; and/or R' is a group of formula V R 9 N ( m

V

31 wherein m, R 9 and R" each is as defined in the claims below; and/or R 1 is a group of formula VI N )q N VI wherein q and R" each is as defined in the claims below; and/or R 1 is a group of formula VII ) M N 5 wherein m is as defined in the claims below; and/or R 2 is hydrogen, C 16 -alkyl or halogen; and/or R 7 is hydrogen or C 16 -alkyl; and/or R 8 is hydrogen or C 1

.

6 -alkyl; and/or R 7 and R 8 to gether with the nitrogen to which they are attached form a heterocyclyl group; and/or R 9 is Cj 6-alkyl; and/or R1 0 is hydrogen or C1.

6 -alkyl; and/or R" is hydrogen, C 1

.

8 -alkyl, C 3

.

8 -alkenyl, C3. 10 8 -alkynyl, C3.

8 -cycloalkyl, C3.

8 -cycloalkenyl, C 3

.

8 -cycloalkyl-C 13 -alkyl or C 3

.

8 -cycloalkenyl

C,

3 -alkyl; and/or R" is C 1 .- alkyl, C 3

-

8 -cycloalkyl or C 3

-

8 -cycloalkyl-C 3 -alkyl; and/or R" is C3 8 -alkyl, C 3

.

8 -cycloalkyl or C 3

.

8 -cycloalkyl-C 1 3 -alkyl; and/or R" is C 16 -alkyl or C 3

.

8 -cycloalkyl, which both are substituted with at least one substituent selected from the group consisting of hydroxy, C 1

.

6 -alkoxy, Cs 6 -alkylcarbonyl, cyano, -NR 5

R

6 , -C(=O)NR 5

R

6 , arylcarbonyl, hetero 15 arylcarbonyl, C 1

.

6 -alkylsulfonyl, arylsulfonyl, heterocyclylcarbonyl, Cl 6 -alkoxycarbonyl, aryl

C

1 6 -alkoxycarbonyl, heteroaryl and heterocyclyl, which heterocyclyl may be substituted with

C

1 .- alkyl, where applicable; and R 5 and R 6 are as defined herein; and/or R" cannot be hy drogen; and/or R 12 is halogen, cyano, C 1

.

6 -alkyl, C3- 8 -cycloalkyl, halo-C 1

.

6 -alkyl, C 1

.

6 -alkoxy, halo-C 1

.

6 -alkoxy, Cl 6 -alkylsulfonyl, C 1

.

6 -alkylsulfinyl, -(CH 2 )s-(C=0)-NR 13

R

14 , heterocyclyl-C 1 . 20 6 -alkyl, heterocycly-C 1

.

6 -alkoxy, heterocyclylcarbonyl, C 16 -alkylcarbonyl, C 16 -alkoxycarbonyl,

C,

6 -alkylcarboxy, cyano-C 6 -alkyl, C 1

.

6 -alkylcarbonylamino, C 1 6 -alkylcarbonylamino-C 6 alkyl, arylcarbonylamino, arylcarbonylamino-Ce 6 -alkyl, heteroarylcarbonylamino or hetero arylcarbonylamino-C 6 -alkyl; and/or R 12 is aryl or heteroaryl, each of which may be substi tuted with halogen, cyano, C 16 -alkyl, C3.

8 -cycloalkyl, C 1 -alkoxy, C 16 -alkylsulfanyl, C 16 -alkyl 25 sulfonyl, C 1

.

6 -alkylcarbonyl, Cl.

6 -alkylcarbonylamino, Cl- 6 -alkoxycarbonyl, Ce 6 -alkylcarboxy, halo-C 1

.

6 -alkyl, halo-C 1

.

6 -alkoxy, C 1 6 -alkoxy-C 1 .- alkyl, aryl, arylcarbonylamino, heteroaryl, heteroarylcarbonylamino or -(CH 2 )-(C=0),-NR 13

R

14 ; and/or R 12 is halogen, hydroxy, cyano, 32 C1.

6 -alkyl, C3 8 -cycloalkyl, halo-C 1

.

6 -alkyl, C1.

6 -alkoxy, halo-C 16 -alkoxy, Cl 6 -alkylsulfonyl, C.6 alkylsulfinyl, -(CH 2 )s-(C=O),-NR1 3

R

4 , C1.

6 -alkylcarbonyl, C1 6 -alkoxycarbonyl, C1 6 -alkyl carboxy, cyano-C, 6 -alkyl, hydroxy-Cl- 6 -alkyl, C1.

6 -alkoxy-C 6 -alkyl, C1.

6 -alkylcarbonylamino or C, 6 -alkylcarbonylamino-Ce-alkyl; and/or R 1 2 is heterocyclyl-C1.

6 -alkyl, heterocyclyl-C,. 5 -alkoxy, heterocyclylcarbonyl, arylcarbonylamino, arylcarbonylamino-C.

6 -alkyl, heteroaryl carbonylamino or heteroarylcarbonylamino-C 6 -alkyl, wherein each said aryl, heteroaryl and heterocyclyl may optionally be substituted with halogen, hydroxy, cyano, C, 6 -alkyl, C 3 cycloalkyl, halo-C, 6 -alkyl, C1.

6 -alkoxy, halo-C1.

6 -alkoxy, C1 6 -alkylsulfonyl, C, 6 -alkylsulfinyl,

C,

6 -alkylcarbonyl, C1.

6 -alkoxycarbonyl, C, 6 -alkylcarboxy, cyano-C1.

6 -alkyl, hydroxy-Ce-alkyl 10 or C,.

6 -alkoxy-C1.-alkyl; and/or R1 2 is aryl or heteroaryl, each of which may be substituted with halogen, hydroxy, carboxy, nitro, cyano, C, 6 -alkyl, C 3

-

8 -cycloalkyl, C, 6 -alkoxy, C 1

.

6 -alkyl sulfanyl, C1.

6 -alkylsulfonyl, C, 6 -alkylcarbonyl, C, 8 -alkylcarbonylamino, C.

6 -alkylcarbonyl amino-Ce,-alkyl, C1.

6 -alkoxycarbonyl, C 16 -alkylcarboxy, halo-C, -alkyl, halo-C,.

6 -alkoxy, hy droxy-C, 6 -alkyl, C, 6 -alkoxy-C1.

6 -alkyl, aryl, arylcarbonylamino, arylcarbonylamino-C1.

6 -alkyl, 15 heteroaryl, heteroarylcarbonylamino, heteroarylcarbonylamino-C1.

6 -alkyl or -V-(CH 2 )s-(C=O)r NR1 3 R1 4 , wherein V is a bond; and/or R 3 is hydrogen or Cl 6 -alkyl; and/or R 1 4 is hydrogen or

C,.

6 -alkyl; and/or R" and R1 4 together with the attached nitrogen form a heterocyclyl group; and/or m is 0, 1 or 2; and/or m is 0; and/or m is 1 or 2; and/or n is 1 or 2; and/or o is 1; and/or p is 1 or 2; and/or m is 0 and p is 2; and/or m is 0, p is 2 and o is 1; and/or q is 1; and/or r is 0 or 1; 20 and/or s is 0 or 1. In an embodiment of this invention, the moiety V is a bond. In an embodiment, this invention relates to any one of the following compounds: 1-[5 (4-chlorophenyl)pyridin-2-yl]-4-isopropylpiperazine; 1-isopropyl-4-[5-(4-methoxyphenyl) pyridin-2-yl]piperazine; 1-isopropyl-4-[5-(4-trifluoromethoxyphenyl)pyridin-2-yl]piperazine; 1 25 {4-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}ethanone; 1-[5-(2,6-difluorophenyl)pyridin 2-yl]-4-isopropylpiperazine; 1-[5-(4-fluorophenyl)pyridin-2-yl]-4-isopropylpiperazine; 1-[5-(3 fluorophenyl)pyridin-2-yl]-4-isopropylpiperazine; 1-[5-(2-fluorophenyl)pyridin-2-yI]-4-isopropyl piperazine; 1-{4-[6-(4-cyclopentylpiperazin-1 -yl)pyridin-3-yl]phenyl}ethanone; 4-[6-(4-iso propylpiperazin-1 -yl)pyridin-3-yl]benzonitrile; (4-(2-pyrrolidin-1 -ylethyl)piperidin-1 -yl)-5-(4-tri 30 fluoromethylphenyl)pyridine; 1-(3-piperidin-1-ylpropyl)-4-[5-(4-trifluoromethylphenyl)pyridin-2 yl]piperazine; 1'-[6-(4-methanesulfonylphenyl)pyridazin-3-y]-[1 ,4']bipiperidinyl; dimethyl-(3-{4 [6-(4-trifluoromethylphenyl)pyridazin-3-yl]piperazin-1-yl}propyl)amine; 3-[4-(1-methylpiperidin 3-ylmethyl)piperazin-1-yl]-6-(4-trifluoromethylphenyl)pyridazine; 3-[4-(1-methylpiperidin-4-yl methyl)piperazin-1 -yl]-6-(4-trifluoromethylphenyl)pyridazine; 4-{6-[4-(1 -methylpiperidin-4-yl 35 methyl)piperazin-1 -yl]pyridazin-3-yl}benzonitrile; 4-{6-[4-(1 -methylpiperidin-3-ylmethyl)- 33 piperazin-1 -yl]pyridazin-3-yl}benzonitrile; (S)-3-(4-butylsulfanylphenyl)-6-(2-pyrrolidin-1 -yl methylpyrrolidin-1-yl)pyridazine; (S)-3-(4-ethanesulfonylphenyl)-6-(2-pyrrolidin-1-ylmethyl pyrrolidin-1-yl)pyridazine; (S)-3-(4-ethanesulfinylphenyl)-6-(2-pyrrolidin-1-ylmethylpyrrolidin 1-yl)pyridazine; (S)-3-(4-ethylsulfanylphenyl)-6-(2-pyrrolidin-1-ylmethylpyrrolidin-1-yl) 5 pyridazine; 5-(4-chlorophenyl)-2-(4-isopropylpiperazin-1 -yl)pyrimidine; 2-(4-isopropyl piperazin-1 -yl)-5-(4-trif luoromethylphenyl)pyrimidine; 4-[2-(4-isopropylpiperazin-1 -yl) pyrimidin-5-yl]benzonitrile; 5-(4-fluorophenyl)-2-(4-isopropylpiperazin-1-yl)pyrimidine; 2-(4 isopropylpiperazin-1 -yl)-5-(4-trifluoromethoxyphenyl)pyrimidine; 2-(4-isopropylpiperazin-1 -yl) 5-(4-methoxyphenyl)pyrimidine; (S)-3-(2-pyrrolidin-1-ylmethylpyrrolidin-1-yl)-6-(4-trifluoro 10 methylphenyl)pyridazine; N-{4-[6-(4-isopropylpiperazin-1-yl)pyridazin-3-yl]phenyl}acetamide; [1 -(1 -ethylpropyl)piperidin-4-yl]-[6-(3-fluoro-4-methoxyphenyl)pyridazin-3-yI]amine; [1 -(1 ethylpropyl)piperidin-4-yl]-[6-(4-methanesulfonylphenyl)pyridazin-3-yl]amine; 1 -isopropyl-4 [5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine; 3-(2,3-dihydrobenzo[1,4]dioxin-6-yl)-6-(4 isopropylpiperazin-1 -yl)pyridazine; 4-{6-[1 -(1 -ethylpropyl)piperidin-4-ylamino]pyridazin-3-yll 15 benzonitrile; dimethyl-(2-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yllethyl)amine; 1-(tetrahydropyran-4-y)-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine; 1-[6-(4-trifluoro methylphenyl)pyridazin-3-yl]piperidin-3-ylamine; N-{4-[6-(4-isopropylpiperazin-1-yl)pyridin-3 yl]benzyl}acetamide; 1-isopropyl-4-{5-[4-(5-methyl[1,2,4]oxadiazol-3-yl)pheny]pyridin-2-yl} piperazine; 1-(5-(5-(4-chloromethylphenyl)[1,2,4]oxadiazol-3-yl)pyridine-2-yl)-4-isopropyl 20 piperazine; 4-{3-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl][1,2,4]oxadiazol-5-yl}benzonitrile; 1 [5-(5-cyclopropyl[1,2,4]oxadiazol-3-yl)pyridin-2-yI]-4-isopropylpiperazine; 1 -isopropyl-4-{5-[5 (4-piperidin-1-ylmethylphenyl)[1,2,4]oxadiazol-3-yl]pyridin-2-yl}piperazine; 1-(4-{3-[6-(4-iso propylpiperazin-1 -yl)pyridin-3-yl][1,2,4]oxadiazol-5-yl}benzyl)piperidine-4-carboxylic acid am ide; 1 -propyl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine; 1 -cyclohexyl-4-[5-(4-tri 25 fluoromethylphenyl)pyridin-2-yl]piperazine; 1-{4-[6-(4-isopropylpiperazin-1-yI)pyridazin-3-ylI] phenyl}ethanone; 1-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1-yl}propan-2-one; N,N-dimethyl-2-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yl}acetamide; 3-{4-[5 (4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yl}propionitrile; diethyl-(2-{4-[5-(4-trifIuoro methylphenyl)pyridin-2-yl]piperazin-1-yl}ethyl)amine; 1-(2-methoxyethyl)-4-[5-(4-trifluoro 30 methylphenyl)pyridin-2-yl]piperazine; 1 -allyl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl] piperazine; 1-isopropyl-4-[6-(4-trifluoromethylphenyl)pyridazin-3-y]-[1,4]diazepane; N-[4-(4 isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetamide; [4-(4-isopropyl 3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetonitrile and 5-(4-ethanesulfonyl phenyl)-4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl, and salts thereof such as hydro 35 chlorides, dihydrochlorides, trihydrochlorides, trifluoroacetates and dimethanesulfonates.

34 In an embodiment, this invention relates to any one of the following compounds: N-{4 [6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}acetamide; cyclopropanecarboxylic acid [4 (4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yI)phenyl]amide; 2-cyclopropyl-N-[4-(4 isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetamide; 4-methoxycyclo 5 hexanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl] amide; 4-{4-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl)morpholine; 4-[2-(4-isopropyl piperazin-1 -yl)pyrimidin-5-yl]benzonitrile and N-{4-[2-(4-isopropylpiperazin-1 -yl)pyrimidin-5 yl]benzyl}acetamide and salts thereof such as hydrochlorides, dihydrochlorides, trihydrochlo rides, trifluoroacetates and dimethanesulfonates. 10 In an embodiment, this invention relates to any one of the following compounds: 4-[6 (4-cyclopropylpiperazin-1 -yl)piperidin-3-yl]-N, N-dimethylbenzamide and N-{4-[6-(4-cyclo propylpiperazin-1 -yl)pyridazin-3-yl]-2-methoxyphenyl}acetamide, and salts thereof such as hydrochlorides, dihydrochlorides, trihydrochlorides, trifluoroacetates and dimethanesul fonates. 15 In an embodiment, this invention relates to any one of the following compounds: N-{3 [6-(4-isopropylpiperazin-1-yl)-4-methylpyridin-3-yl]phenyl}acetamide; N-{3-[6-(4-isopropyl piperazin-1-yl)-5-methylpyridin-3-yl]phenyl}acetamide; N-{4-(6-(4-isopropylpiperazin-1-yl)-4 methylpyridin-3-yl]phenyl}acetamide; N-{4-[6-(4-isopropylpiperazin-1-yl)-5-methylpyridin-3 yl]phenyl}acetamide; N-{4-[6-(4-isopropylpiperazin-1-yl)-4-methylpyridazin-3-yl]phenyl} 20 acetamide; N-{3-[6-(4-cyclopropylpiperazin-1-yl)-4-methylpyridin-3-yl]phenyl}acetamide; 3-[6 (4-cyclopropylpiperazin-1-yl)-4-methylpyridin-3-yl]-N,N-dimethylbenzamide; N-{4-[6-(4-cyclo propylpiperazin-1 -yl)-4-methylpyridin-3-yl]phenyllacetamide; 4-[6-(4-cyclopropylpiperazin-1 yl)-4-methylpyridin-3-yl]-N,N-dimethylbenzamide; 5-1,3-benzodioxol-5-yl-2-(4-cyclopropyl piperazin-1-yl)pyrimidine; N-{4-[6-(4-isopropylperhydro-1,4-diazepin-1-yl)pyridazin-3-y] 25 phenylacetamide; 4-[6-(4-isopropylperhydro-1,4-diazepin-1 -yl)pyridazin-3-yl]phenylamine; N-{4-[6-(4-cyclopropyl-[1,4]diazepan-1 -yl)pyridazin-3-yl]phenyl}acetamide; 7-[6-(4-cyclo propylpiperazin-1 -yl)-pyridazin-3-yl]-4-methyl-3,4-dihydro-2H-1,4-benzoxazine; 3-(4-cyclo propylpiperazin-1 -yl)-6-( 2 ,3-dihydro-1,4-benzodioxin-6-yl)pyridazine; 5-[6-(4-cyclopropyl piperazin-1 -yl)pyridazin-3-yl]-1 H-indole; {4-[2-(4-isopropylpiperazin-1 -yl)pyrimidin-5-yl] 30 phenyl}acetonitrile; N-(4-[2-(4-isopropylpiperazin-1-yl)pyrimidin-5-yl]phenyl}acetamide; 1-(4 [2-(4-isopropylpiperazin-1-yl)pyrimidin-5-yl]phenyl}ethanone; 2-(4-isopropylpiperazin-1-yl)-5 pyridin-3-ylpyrimidine; 2-(4-isopropylpiperazin-1-yl)-5-pyridin-4-ylpyrimidine; {4-[2-(4-iso propylpiperazin-1 -yl)pyrimidin-5-yl]phenyl}dimethylamine; 3-[2-(4-isopropylpiperazin-1 yl)pyrimidin-5-yl]-N,N-dimethylbenzamide; N,N-diisopropyl-4-(4-isopropyl-3,4,5,6-tetrahydro 35 2H-[1,2']bipyrazinyl-5'-yl)benzamide; [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl- 35 5'-yI)pheriyl]-(4-methylpiperidin-1 -yI)methanone; 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2] bipyrazinyl-5'-yI)-N, N-dimethylbenzamide; [3-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bi pyrazinyl-5'-yI)phenyl]morpholin-4-ylmethanone; N-{4-[5-(octahydropyrido[1 ,2-alpyrazin-2 yI)pyrazin-2-yI]phenyllacetamide; 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5' 5 yI)phenol; N-(4-(4-isopropyl-3,4,5,6-tetrahydro-2 H-[1 ,2']bipyrazinyl-5'-yI)phenyl]-N-methyl amine; 4-isopropyl-5'-(4-morpholin-4-ylphenyl)-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; 5'- 1,3 benzodioxol-5-yI-4-isopropyl-3,4,5,6-tetrahydro-2H-1 ,2'-bipyrazflyl; 4-(4-isopropyl-3,4,5,6 tetrahydro-2 H-[1 ,2']bipyrazinyl-5'-yI)-2-methoxyphenylamine; 2-chloro-4-(4-isopropyl-3,4,5,6 tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yI)-6-methoxyphenol; 5'-(3 ,4-dimethoxyphenyl)-4-isopropy 10 3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; 4-isopropyl-5'-(3 ,4,5-trimethoxyphenyl)-3,4,5,6-tetra hydro-2H-[1 ,2']bipyrazinyl; N-[4-(4-isopropyl-3 ,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-y) benzyl]acetamide; 4,4"'-diisopropyl-3,4,5,6,3"',4',5'',6'-octahydro-2 H,2 .. H-[1 ,2' ;5',2";5111 .. quaterpyrazine; 4-isopropyl-5'-(6-methoxypyridin-3-y)-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; N, N-diisopropyl-4-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-yl]benzamide; {4-[6-(4-isopropyl 15 piperazin-1 -yI)pyridin-3-yI]phenyl}-(4-methylpiperidin-1 -yI)methanone; 6'-(4-isopropyl piperazin-1 -yI)-6-methoxy-[3 ,3']bipyridinyl; 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bi pyrazinyl-5'-yI)benzonitrile; 4-isopropyl-5'-(4-trifluoromethylphenyl)-3,4,5,6-tetrahydro-2H [1 ,2']bipyrazinyl; 6'-(4-isopropylpiperazin-1 -yI)-5-trifluoromethyl-[2 ,3']bipyridinyl; 4-isopropyl 5'-[4-(piperidine-1 -su Ifonyl)phenyl]-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; 4-isopropyl-5'-(4 20 (piperidin-1 -yI)phenyl)-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; [4-(4-isopropyl-3,4,5,6-tetra hydro-2H-[1 ,2']bipyrazinyl-5'-yl)-2-methylphenyl]dimethylamine; 5'-(6-ethoxypyridin-3-yI)-4 isopropyl-3 ,4,5,6-tetrahydro-2 H-[1 ,2']bipyrazinyl; 5'-benzofuran-2-yI-4-isopropyl-3,4,5,6-tetra hydro-2H-[1 ,2']bipyrazinyl; 5-(4-isopropyl-3 ,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yI)thio phene-2-carbonitriie; 4-isopropyl-5'-(2-methylpyridin-4-yI)-3,4,5,6-tetrahydro-2H-[1 ,2I]bi 25 pyrazinyl; (R)-2-(6-1 ,3-benzodioxol-5-ylpyridazin-3-yI)octahydropyrido[1 ,2-a]pyrazine; 4 isopropyl-5'-(5-trifluoromethyl-pyridin-2-yI)-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl; N-{4-[6-(4 cyclobutylpiperazin-1 -yI)pyridin-3-y]phenyllacetamide; 4-[6-(4-cyclobutylpiperazin-1 -yI) pyridin-3-yI]-N,N-dimethylbenzamide; N-{4-[6-(4-cyclobutylpiperazin-1 -yI)pyridazin-3-yI]-2 methoxyphenyijacetamide; {4-[6-(4-isopropylpiperazin-1 -yI)pyridazin-3-yI]phenyllpiperidin-1 30 ylmethanone; {4-[6-(4-cyclopropylmethylpiperazin-1 -yI)pyridazin-3-yi]phenyl~piperidin-1 -yI methanone; {4-[6-(4-isopropylpiperazin-1 -yI)pyridazin-3-yl]phenyllmorpholin-4-ylmethanone; (4-hydroxymethylpiperidin-1 -yI)-{4-[6-(4-isopropylpiperazin-1 -yI)pyridazin-3-yI]phenyl} methanone; 4-[6-(4-isopropyipiperazin-1 -yI)pyridazin-3-yI]-N, N-dimethylbenzamide; {4-[6-(4 cyclopentylpiperazin-1 -yI)pyridazin-3-yI]phenyl)piperidin-1 -ylmethanone; {4-(6-(4-isopropyl 35 piperazin-1 -yI)pyridazin-3-yI]phenyl}-(4-methylpiperazin-1 -yI)methanone; {4-[6-(4-isopropyl- 36 piperazin-1 -yI)pyridin-3-y]phenyllmorpholin-4-ylmethanone; 4-[6-(4-isopropylpiperazin-1 yI)pyridin-3-yI]-N, N-dimethylbenzamide; {4-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-yI]phenyl} piperidin-1 -ylmethanone; (4-hydroxymethylpiperidin-1 -yI)-{4-[6-(4-isopropylpiperazin-1 -yI) pyridin-3-yI]phenyll-methanone; {4-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-yi]phenyl}-(4 5 methylpiperazin-1 -yI)methanone; {4-[6-(4-cyclopropylmethylpiperazin-1 -yI)pyridin-3-y] phenyl~piperidin-1 -ylmethanone; {4-[6-(4-cyclopropylpiperazin-1 -yI)pyridin-3-yI]phenyl} piperidin-1 -ylmethanone; {4-[6-(4-cyclopentylpiperazin-1 -yI)pyridin-3-yi]phenyllpiperidin-1 -yl methanone; {3-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-y]phenyl~morpholin-4-ylmethanone; {3 [6-(4-isopropylpiperazin-1 -yI)pyridin-3-yI]phenyllpiperidin-1 -ylmethanone; 3-[6-(4-isopropyl 10 piperazin-1 -yI)pyridin-3-yI]-N, N-dimethylbenzamide; {4-[6-(4-cyclopentylpiperazin-1 -yI) pyridin-3-yI]phenyl)-(4-methylpiperazin-1 -yI)methanone; {4-[6-(4-cyclopropyipiperazin-1 -yI) pyridin-3-yI]phenyl}-(4-methylpiperazin-1 -yI)methanone; {4-[6-(4-i Isopropylpiperazin-1 -yI) pyridin-3-yI]phenyl}-(4-methoxymethylpiperidin-1 -yI)-ethanone; 4-[6-(4-'cyclopentylpiperazin 1 -yI)pyridin-3-yI]-N,N-dimethylbenzamide; {4-[6-(4-cyclopentylpiperazin-1 -yI)pyridin-3-yI] 15 phenyl~morpholin-4-ylmethanone; 3-[6-(4-isopropylpiperazin-1 -yi)-4-methylpyridin-3-yI]-N, N dimethyibenzamidle; 3-[6-(4-isopropylpiperazin-1 -yI)-5-methylpyridin-3-y]-N, N-dimethyl benzamide; 4-[6-(4-isopropylpiperazin-1 -yi)-5-methylpyridin-3-y]-NN-dimethylbenzamide; 4 [6-(4-isopropylpiperazin-1 -yI)-4-methylpyridin-3-y]-N, N-dimethylbenzamide; 4-[4-isopropyl-6 (4-isopropylpiperazin-1 -yI)pyridazin-3-yI]-N,N-dimethylbenzamide; 1 -cyclopropylmethyl-4-[5 20 (4-piperidin-1 -ylmethylphenyl)pyridin-2-yllpiperazine; {4-[6-(4-isopropylpiperazin-1 -yI)pyridin 3-yI]benzyl~dimethylamine; 3-(4-cyclopentylpiperazin-1 -yi)-6-(4-piperidin-1 -ylmethyiphenyl) pyridazine; 1 -{4-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-y]benzyl)-4-methylpiperazine; (1 -{4 [6-(4-isopropylpiperazin-1 -yI)pyridin-3-yI]benzyllpiperidin-4-yI)methanol; 1 -isopropyl-4-[5-(4 piperidin-1 -ylmethylphenyl)pyridin-2-yi]piperazine; (4-[6-(4-isopropylpiperazin-1 -yI)pyridazin 25 3-yI]benzyl~dimethylamine; 3-(4-isopropylpiperazin-1 -yI)-6-(4-piperidin-1 -ylmethyiphenyl) pyridazine; 3-(4-isopropylpiperazin-1 -yI)-6-[4-(4-methylpiperazin-1 -ylmethyl)phenyl] pyridazine; (1 -{4-[6-(4-isopropylpiperazin-1 -yI) pyridaz in-3 -yI]benzyl~p ipe rid in-4-yI) methanol; 4-{4-[6-(4-isopropylpiperazin-1 -yI)pyridazin-3-yI]benzyllmorpholine; 1 -cyciopentyl-4-[5-(4 piperidin-1 -ylmethylphenyl)pyridin-2-yIlpiperazine; 1 -cyclopro pyl-4-[5- (4-pipe rid in- 1-ylmethyl 30 phenyl)pyridin-2-yI]piperazine; 3-(4-cyclopropylmethylpiperazin-1 -yI)-6-(4-piperidin-1 -yI methylphenyl)pyridazine; 3-(4-cyclopropylpiperazin-1 -yI)-6-(4-piperidin-1 -ylmethylphenyl) pyridazine; 4-{4-[2-(4-cyclopropylpiperazin-1 -yI)pyrimidin-5-yI]benzyi~morpholine; N-{3-[6-(4 isopropylpiperazin-1 -yi)pyridazin-3-yI]phenyllacetamide; N-(3-[6-(4-cyclopropylpiperazin-1 yl)pyridazin-3-yIjphenyl~acetamide; cyclopropanecarboxylic acid {3-[6-(4-cyclopropyl 35 piperazin-1 -yI)pyridazin-3-yI]phenyl~amide; N-{4-[6-(4-cyclopropylpiperazin-1 -yI)pyridazin-3- 37 yI]phenyllacetamide; cyclopropanecarboxylic acid {4-[6-(4-cyclopropylpiperazin-1 -yI) pyridazin-3-yI]phenyl~amide; cyclopropanecarboxylic acid {4-[6-(4-cyclopropylperhydro-1 ,4 diazepin-1 -yI)pyridazin-3-yI]-phenyl~amide; N-[4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2'] bipyrazinyl-5'-yI)phenyl]-2,2-dimethylpropionamide; tetrahydropyran-4-carboxylic acid [4-(4 5 isopropyl-3,4,5,6-tetrahydro-2H-(1 ,2']bipyrazinyl-5'-yI)phenyl]amide; N-(4-(4-isopropyl-3,4,5,6 tetrahydro-2H-[1,2]iyaiy 'y~hey]Nmtyaeaie cyclopropanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yI)phenyl]methylamide; N-[4-(4-iso propyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yI)-2-methoxyphenyl]acetamide; cyclo hexanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2lbipyrazinyl-5'-yI)phenyl] 10 amide; 2-[4-(4-isopropyl-3 ,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yI)phenoxy]-N, N-dimethyl acetamide; 5'-[4-(1 ,1 -dioxoisothiazolidin-2-yI)phenyl]-4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2'] bipyrazinyl; 6-(4-isopropylpiperazin-1 -yi)-[3 ,3']bipyridinyl; 6-(4-isopropylpiperazin-1 -yI)-[3,4'] bipyridinyl; 6'-(4-isopropylpiperazin-1 -yI)-[2,3']bipyridinyl; 6'-(4-ethylpiperazin-1 -yI)-[2,3']bi pyridinyl; 6'-(4-isopropylpiperazin-1 -yI)-6-methyl-[2,3']bipyridinyl; 6'-(4-ethylpiperazin-1 -yI)-6 15 methyl-[2,3']bipyridinyl; 2-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-yI]qu inoline; N-{3-[6-(4-iso propylpiperazin-1 -yI)-4-methylpyridazin-3-yI]phenyl~acetamide; N-{3-[6-(4-isopropylpiperazin 1 -yI)-5-methylpyridazin-3-yI]phenyl~acetamide; 3-[6-(4-isopropylpiperazin-1 -yI)-4-methyl pyridazin-3-yI]-N, N-dimethylbenzamide; 3-[6-(4-isopropylpiperazin-1 -yI)-5-methylpyridazin-3 yI]-N, N-dimethylbenzamide; 4-[6-(4-isopropylpiperazin-1 -yI)-4-methylpyridazin-3-yl]-N, N-di 20 methyibenzamide; 4-[6-(4-isopropylpiperazin-1 -yI)-5-methylpyridazin-3-y]-N, N-dimethyl benzamide; N-(4-[6-(4-isopropylpiperazin-1 -yI)-5-methyipyridazin-3-yI]phenyl~acetamide; 1' (6-pyridin-4-ylpyridazin-3-y)-[1 ,4']bipiperidinyl; 3-(pyridin-3-yI).6-((4-pyrrolidin-1 -yI)piperidin 1 -yI]pyridazine; 1 '-(6-pyridin-3-ylpyridazin-3-y)-[1 ,4']bipiperidinyl; 3-(pyridin-4-yI)-6-[(4 pyrrolidin-1 -yI)piperidin-1 -yi]pyridazine; 4-pyrrolidin-1 -yl-3,4,5,6-tetrahydro-2H-[1 ,29;5',3"] 25 terpyridine; 1 -isopropyl-4-(6-phenylpyridin-3-yI)piperazine; (R)-2-[6-(3 ,4-dimethoxyphenyl) pyridazin-3-yI]octahydropyrido[1 ,2-a]pyrazine; N-[3- [6-(4-isop ropyl pipe razi n -1 -yI)pyridin-3 yI]benzyl~acetamide; N -14- [6- (4-isopropyl pipe razin- 1-yI)pyridin-3-yI]benzyl)-3,3-dimethyl butyramide; N-[3-[6-(4-isopropylpiperazin-1 -yI)pyridin-3-y]benzyl-3,3-dimethylbutyramide; N-{4-[2-(4-isopropylpiperazin-1 -yI)pyrimidin-5-yI]benzyllisobutyramide; N-{4-[6-(4-isopropy! 30 piperazin-1 -yI)pyridin-3-y]benzyl-2,2-dimethylpropionamide; N-[3-[6-(4-isopropylpiperazin-1 yI)pyridin-3-yI]benzyll-2 ,2-dimethylpropionamide; 4-[2-(4-cyclopropylpiperazin-1 -yI)pyrimidin 5-yI]benzylamine; N-{4-[2-(4-cyclopropylpiperazin-1 -yI)pyrimidin-5-yI]benzyl~acetamide; N-{4 [6-(4-isopropylpiperazin-1 -yI)pyridazin-3-yI]acetamide; N-[4-(4-cyclopropyl-3,4,5,6-tetrahydro 2H-[1 ,2']bipyrazinyl-5'-yI)phenyl]acetamide; 2-{4-[6-(4-isopropylpiperazin-1 -yI)pyridazin-3-y] 35 phenoxy}-N,N-dimethylacetamide; cyclohexanecarboxylic acid {4-[6-(4-cyclopropylpiperazin- .... 38 1 -yl)pyridazin-3-yl]phenyl)amide and N-{4-[4-isopropyl-6-(4-isopropylpiperazin-1 -yl)pyridazin 3-yl]phenyl)acetamide and salts thereof such as hydrochlorides, dihydrochlorides, trihydro chlorides, trifluoroacetates and dimethanesulfonates. 5 Combining any one of the above embodiments results in further embodiments and the present invention relates to all possible combinations of the above embodiments and all possible combi nations with the claims below. Herein, the definition of compounds of formula I contains some provisos which have been 10 designated provisos a) through g). These provisos are defined in claim 1 below. In an embodiment of this invention, proviso a) is worded as follows: "a) when R' is a group of any of the formula Il through VII; W is -N=; X, Y and Z is each a moiety of the gen eral formula -C(R 2 )=; wherein R 2 is as defined above; then A cannot be optionally substituted imidazolyl." 15 In another embodiment of this invention, proviso a) is worded as follows: "a) when R 1 is a group of any of the formula 11 through VII; W is -N=; X, Y and Z is each a moiety of the general formula -C(R 2 )=; wherein R 2 is as defined above; then A cannot be optionally substi tuted heteroaryl." In an embodiment of this invention, proviso b) is worded as follows: "b) when R 1 is a 20 group of the formula VI; X is -C(R 2 )=; R" is C 1

.

8 -alkyl, C 2

.

8 -alkenyl, C 2 -.-alkynyl, C 3

.

8 -cyclo alkyl, C3.

8 -cycloalkenyl, C 3

-

8 -cycloalkyl-C 1

.

3 -alkyl or C 3

.

8 -cycloalkenyl-C 1

.

3 -alkyl; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then A can not be unsubstituted aryl or substituted heteroaryl, and, if A is substituted, then R 12 can not be halogen, hydroxy, halo-C 1

.

6 -alkyl, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkoxy , C 1

.

6 -alkyl, C1.

6 -alkylsulfonyl, 25 cyano, aryl, heteroaryl, C 3

-

8 -cycloalkyl or a group of the formula -V-(CH 2 )s-(C=0),-NR R", wherein V is a bond, r and s each is 0 (zero), and R 13 and R 4 each is hydrogen or C1.

6 -alkyl." In an embodiment of this invention, proviso c) is worded as follows: "c) when R' is a group of the formula VII; X is a moiety of the formula -C(R 2 )=; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R 12 can not be halogen, 30 hydroxy, halo-C 1

.

6 -alkyl, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkoxy, C1.

6 -alkyl, C 1

.

6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -V-(CH 2 )-(C=0)-NR R , wherein V is a bond, r and s each is 0 (zero), and R 13 and R 14 each is hydrogen or C, 6 -alkyl." In an embodiment of this invention, proviso d) is worded as follows: "d) when R 1 is a group of the formula VI; R" is C 1

.

8 -alkyl; Y and Z is each -N=; X is a moiety of the formula 35 C(R 2 )=, and W is a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; 39 then R 12 can not be halogen, hydroxy, halo-C 1

.

6 -alkoxy, halo-C1.

6 -alkoxy, C 1

.

6 -alkoxy,

C

1

.

6 -alkyl, C 16 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula V-(CH 2 )s-(C=O),-NR R", wherein V is a bond, r and s each is 0 (zero), and R 1 and R 1 each is hydrogen or C 1

.

6 -alkyl." 5 In an embodiment of this invention, proviso e) is worded as follows: "e) when R 1 is a group of the formula VIl; Y and Z is each -N=; X is a moiety of the formula -C(R 2 )=; and W is a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R 12 can not be halogen, hydroxy, halo-C 1

.

6 -alkyl, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkoxy, C 1 6 -alkyl, C1.

6 -alkyl sulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -V-(CH 2 )s-(C=O)r 10 NR R", wherein V is a bond, r and s each is 0 (zero), and R" and R" each is hydrogen or Cl-6-alkyl." In an embodiment of this invention, proviso f) is worded as follows: ') when R 1 is for mula VI, q is 1, X and W is each a moiety of the general formula -C(R 2 )=, wherein R2 is as defined above, Y and Z is each -N=, R' 1 is C 1

.

8 -alkyl, and A is phenyl, then R" can not be 15 halogen, hydroxy, halo-C 1

.

6 -alkoxy, C 1

.

6 -alkoxy, C 1

.

6 -alkyl, C 1

.

6 -alkylsulfanyl, C 1

.

6 -alkylsulfinyl,

C

1

.

6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3

.

8 -cycloalkyl or a group of the formula -V-(CH 2

),

(C=0)-NR R", wherein V is a bond, r and s each is 0 (zero), and R 1 and R 1 each is hy drogen or C 1

.

6 -alkyl." In an embodiment of this invention, proviso g) is worded as follows: "g) when X and Z 20 is each -C(R 2 )=; and one or both of W and Y are -N=; then R 1 cannot be a group of the for mula 11." In an embodiment of this invention, R' is different from possibility ii), formula VII, when the ring containing W, X, Y and Z is a pyridazine ring. In an embodiment of this invention, R' is different from possibility i), when the ring 25 containing W, X, Y and Z is a pyridazine ring. In an embodiment of this invention, R 1 is different from possibility i), when the ring containing W, X, Y and Z is a pyrimidine ring. In an embodiment of this invention, R 1 is different from possibility i), i.e. R' is possi bility ii). 30 In an embodiment of this invention, R' is different from hydrogen. In an embodiment of this invention, R 11 is different from methyl. In an embodiment of this invention, R" is different from C 1

.

8 -alkyl. In an embodiment of this invention, R 2 is different from cyano. In an embodiment of this invention, at least one of W, X, Y and Z is a moiety of the 35 formula -C(R 2 )= wherein R 2 is as defined herein.

40 In an embodiment of this invention, R' is not a group of formula 11 when the ring con taining W, X, Y and Z is a pyridazine ring. In one embodiment of this invention, R' is different from possibility ii), formula || and 111, when W and Y are each -N=; and X and Z are each -C(R 2 )=, wherein R 2 is as defined 5 herein. In one embodiment of this invention, R' is different from possibility ii), formula II wherein m is 2, n is 1 or 2, and 0 is -0-, when W and Y are each -N=; and X and Z are each

-C(R

2 )=, wherein R 2 is as defined herein. In one embodiment of this invention, R' is different from possibility ii), formula Ill 10 wherein p is 1, m is 2, o is 0 (zero), and -NR 7

R

8 is heterocyclyl, when W and Y are each -N=; and X and Z are each -C(R 2 )=, wherein R 2 is as defined herein. In one embodiment of this invention, R' is different from possibility ii), formula il and Ill, when W and Y are each -N=; and X and Z are each -C(R 2 )=, wherein R 2 is as defined herein, and when A is aryl or heteroaryl optionally substituted by halogen, hydroxy, cyano, 15 Cl.

6 -alkyl, C 3

-

8 -cycloalkyl, halo-C 6 -alkyl, C 16 -alkoxy, halo-C 1

.

6 -alkoxy or -V-(CH 2 )s-(C=O)r

NR'R"

4 , wherein V, s, R 1 and R 1 are as defined herein. The compounds of the present invention interact with the histamine H3 receptor and are ac cordingly particularly useful in the treatment of a variety of diseases or conditions in which 20 histamine H3 interactions are beneficial. In one aspect, the invention provides the use of a compound according to formula I in a pharmaceutical composition. The pharmaceutical composition may in another aspect of the invention comprise, as an active ingredient, at least one compound according to formula I together with one or more pharmaceutically acceptable carriers or excipients. In another as 25 pect, the invention provides such a pharmaceutical composition in unit dosage form, com prising from about 0.05 mg to about 1000 mg, e.g., from about 0.1 mg to about 500 mg, such as from about 0.5 mg to about 200 mg of the compound according to formula 1. In another aspect, the invention provides the use of a compound of formula I as de fined above for the preparation of a pharmaceutical composition for the treatment of diseases 30 and disorders in which an inhibition of the H3 histamine receptor has a beneficial effect. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition having histamine H3 antagonistic activity or his tamine H3 inverse agonistic activity. In another aspect the invention provides the use of a compound of formula I for the 35 preparation of a pharmaceutical composition for the reduction of weight.

41 In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the treatment of overweight or obesity. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the suppression of appetite or for satiety in 5 duction. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the prevention and/or treatment of disorders and diseases related to overweight or obesity, such as dyslipidaemia, coronary heart dis ease, gallbladder disease, osteoarthritis and various types of cancer such as endometrial, 10 breast, prostate and colon cancers. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the prevention and/or treatment of eating disorders, such as bulimia or binge eating. In another aspect, the invention provides the use of a compound of formula I for the 15 preparation of a pharmaceutical composition for the treatment of IGT (Impaired glucose tol erance). In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the treatment of type 2 diabetes. In another aspect, the invention provides the use of a compound of formula I for the 20 preparation of a pharmaceutical composition for the delaying or prevention of the progression from IGT to type 2 diabetes. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the delaying or prevention of the progression from non-insulin requiring type 2 diabetes to insulin requiring type 2 diabetes. 25 In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the treatment of diseases and disorders in which a stimulation of the H3 histamine receptor has a beneficial effect. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition having histamine H3 agonistic activity. 30 In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the treatment of allergic rhinitis, ulcer or ano rexia. In another aspect, the invention provides the use of a compound of formula I for the preparation of a pharmaceutical composition for the treatment of Alzheimer's disease, narco 35 lepsy, attention deficit disorders or reduced wakefulness, or for the regulation of sleep.

42 In another aspect, the invention relates to the use of a compound of formula I for the preparation of a pharmaceutical preparation for the treatment of airway disorders, such as asthma, for regulation of gastric acid secretion, or for treatment of diarrhoea. In another aspect, the invention provides a method for the treatment of disorders or 5 diseases related to the H3 histamine receptor, the method comprising administering to a sub ject in need thereof an effective amount of a compound of the general formula I as defined above, or of a pharmaceutical composition comprising such a compound. In another aspect, the invention provides a method as described above, wherein the effective amount of the compound of the general formula I as defined above is in the range of 10 from about 0.05 mg to about 2000 mg, preferably from about 0.1 mg to about 1000 mg, and more preferably from about 0.5 mg to about 500 mg per day. In one aspect, the invention relates to compounds which exhibit histamine H3 recep tor antagonistic activity or inverse agonistic activity and which may accordingly be useful in the treatment of a wide range of conditions and disorders in which histamine H3 receptor 15 blockade is beneficial. In another aspect, the invention provides a method for reduction of weight, the method comprising administering to a subject in need thereof an effective amount of a com pound of formula I as defined above. In another aspect, the invention provides a method for treatment of overweight or 20 obesity, the method comprising administering to a subject in need thereof an effective amount of a compound of formula 1. In another aspect, the invention provides a method for suppression of appetite or for satiety induction, the method comprising administering to a subject in need thereof an effec tive amount of a compound of formula 1. 25 In another aspect, the invention provides a method for prevention and/or treatment of disorders or diseases related to overweight or obesity, such as dyslipidaemia, coronary heart disease, gallbladder disease, osteoarthritis and various types of cancer, e.g. endo metrial, breast, prostate or colon cancer, the method comprising administering to a subject in need thereof an effective amount of a compound of formula 1. 30 In another aspect, the invention provides a method for prevention and/or treatment of eating disorders, such as bulimia and binge eating, the method comprising administering to a subject in need thereof an effective amount of a compound of formula 1. In another aspect, the invention provides a method for the treatment of IGT (Im paired glucose tolerance), the method comprising administering to a subject in need thereof 35 an effective amount of a compound of formula 1.

43 In another aspect, the invention provides a method for the treatment of type 2 diabe tes, the method comprising administering to a subject in need thereof an effective amount of a compound of formula 1. In another aspect, the invention provides a method for the delaying or prevention of 5 the progression from IGT to type 2 diabetes, the method comprising administering to a sub ject in need thereof an effective amount of a compound of formula 1. In another aspect, the invention provides a method for the delaying or prevention of the progression from non-insulin requiring type 2 diabetes to insulin requiring type 2 diabe tes, the method comprising administering to a subject in need thereof an effective amount of 10 a compound of formula 1. In another aspect, the invention relates to compounds which exhibit histamine H3 receptor agonistic activity and which may accordingly be useful in the treatment of a wide range of conditions and disorders in which histamine H3 receptor activation is beneficial. Compounds of the present invention may also be used for the treatment of airway 15 disorders (such as asthma), as anti-diarrhoeals, and for the modulation of gastric acid secre tion. Furthermore, compounds of the present invention may be used for the treatment of diseases associated with the regulation of sleep and wakefulness, and for the treatment of narcolepsy and attention deficit disorders. 20 Moreover, compounds of the invention may be used as CNS stimulants or as seda tives. The present compounds may also be used for the treatment of conditions asso ciated with epilepsy. Additionally, compounds of the invention may be used for the treatment of motion sickness and vertigo. Furthermore, they may be useful as regulators of hypotha 25 lamo-hypophyseal secretion, as antidepressants, as modulators of cerebral circulation, and in the treatment of irritable bowel syndrome. Further, compounds of the present invention may be used for the treatment of de mentia and Alzheimer's disease. Compounds of the present invention may also be useful for the treatment of allergic 30 rhinitis, ulcer or anorexia. Compounds of the present invention may furthermore be useful for the treatment of migraine [see, e.g., McLeod et al., The Journal of Pharmacology and Experimental Thera peutics 287 (1998), 43-50] and for the treatment of myocardial infarction [see Mackins et al., Expert Opinion on Investigational Drugs 9 (2000), 2537-2542].

44 In a further aspect of the invention, treatment of a patient with a compound of the present invention is combined with diet and/or exercise. In a further aspect of the invention, one of more compounds of the present invention is/are administered in combination with one or more further active substances in any suitable 5 ratio(s). Such further active agents may, for example, be selected from antiobesity agents, antidiabetics, antidyslipidemic agents, antihypertensive agents, agents for the treatment of complications resulting from or associated with diabetes, and agents for the treatment of complications and disorders resulting from or associated with obesity. Thus, in a further aspect of the invention one or more compounds of the present in 10 vention may be administered in combination with one or more antiobesity agents or appetite regulating agents. Such agents may, for example, be selected from the group consisting of CART (***e amphetamine regulated transcript) agonists, NPY (neuropeptide Y) antago nists, MC4 (melanocortin 4) agonists, MC3 (melanocortin 3) agonists, orexin antagonists, TNF (tumor necrosis factor) agonists, CRF (corticotropin releasing factor) agonists, CRF BP 15 (corticotropin releasing factor binding protein) antagonists, urocortin agonists, P3 adrenergic agonists such as CL-316243, AJ-9677, GW-0604, LY362884, LY377267 or AZ-40140, MSH (melanocyte-stimulating hormone) agonists, MCH (melanocyte-concentrating hormone) an tagonists, CCK (cholecystokinin) agonists, serotonin re-uptake inhibitors such as fluoxetine, seroxat or citalopram, serotonin and noradrenaline re-uptake inhibitors, mixed serotonin and 20 noradrenergic compounds, 5HT (serotonin) agonists, bombesin agonists, galanin antago nists, growth hormone, growth factors such as prolactin or placental lactogen, growth hor mone releasing compounds, TRH (thyreotropin releasing hormone) agonists, UCP 2 or 3 (uncoupling protein 2 or 3) modulators, leptin agonists, DA agonists (bromocriptin, doprexin), lipase/amylase inhibitors, PPAR (peroxisome proliferator-activated receptor) modulators, 25 RXR (retinoid X receptor) modulators, TR P agonists, AGRP (Agouti related protein) inhibi tors, opioid antagonists (such as naltrexone), exendin-4, GLP-1 and ciliary neurotrophic fac tor. In one embodiment of the invention, an antiobesity agent administered in combina tion with one or more compounds of the invention is leptin. 30 In another embodiment, such an antiobesity agent is dexamphetamine or ampheta mine. In another embodiment, such an antiobesity agent is fenfluramine or dexfenflura mine. In still another embodiment, such an antiobesity agent is sibutramine. 35 In a further embodiment, such an antiobesity agent is orlistat.

45 In another embodiment, such an antiobesity agent is mazindol or phentermine. In still another embodiment, such an antiobesity agent is phendimetrazine, diethyl propion, fluoxetine, bupropion, topiramate or ecopipam. In yet a further aspect of the invention, one or more compounds of the present in 5 vention may be administered in combination with one or more antidiabetic agents. Relevant antidiabetic agents include insulin, insulin analogues and derivatives such as those disclosed in EP 0 792 290 (Novo Nordisk A/S), e.g. NEB2-tetradecanoyl des (B30) human insulin, EP 0 214 826 and EP 0 705 275 (Novo Nordisk A/S), e.g. AspB 28 human insulin, US 5,504,188 (Eli Lilly), e.g. Lyssa Pro"' human insulin, EP 0 368 187 (Aventis), e.g. Lantus@, all of which are 10 incorporated herein by reference, GLP-1 derivatives, such as those disclosed in WO 98/08871 (Novo Nordisk A/S), incorporated herein by reference, as well as orally active hy poglycaemic agents. The orally active hypoglycaemic agents preferably comprise imidazolines, sulfony lureas, biguanides, meglitinides, oxadiazolidinediones, thiazolidinediones, insulin sensitizers, 15 a-glucosidase inhibitors, agents acting on the ATP-dependent potassium channel of the p cells, e.g. potassium channel openers such as those disclosed in WO 97/26265, WO 99/03861 and WO 00/37474 (Novo Nordisk A/S) which are incorporated herein by reference, or mitiglinide, or a potassium channel blocker, such as BTS-67582, nateglinide, glucagon antagonists, such as one of those disclosed in WO 99/01423 and WO 00/39088 (Novo Nord 20 isk A/S and Agouron Pharmaceuticals, Inc.), both of which are incorporated herein by refer ence, GLP-1 agonists, such as those disclosed in WO 00/42026 (Novo Nordisk A/S and Agouron Pharmaceuticals, Inc.), incorporated herein by reference, DPP-IV (dipeptidyl pepti dase-IV) inhibitors, PTPase (protein tyrosine phosphatase) inhibitors, inhibitors of hepatic enzymes involved in stimulation of gluconeogenesis and/or glycogenolysis, glucose uptake 25 modulators, GSK-3 (glycogen synthase kinase-3) inhibitors, compounds modifying the lipid metabolism such as antilipidemic agents, compounds lowering food intake, PPAR (perox isome proliferator-activated receptor) and RXR (retinoid X receptor) agonists, such as ALRT 268, LG-1268 or LG-1 069. In one embodiment of the invention, one or more compounds of the present inven 30 tion may be administered in combination with insulin or an insulin analogue or derivative, such as NEB"-tetradecanoyl des (B30) human insulin, AspB28 human insulin, LysB2 8 ProB29 human insulin, Lantus*, or a mix-preparation comprising one or more of these. In a further embodiment of the invention, one or compounds of the present invention may be administered in combination with a sulfonylurea, e.g. tolbutamide, chlorpropamide, 35 tolazamide, glibenclamide, glipizide, glimepiride, glicazide or glyburide.

46 in another embodiment of the invention, one or more compounds of the present in vention may be administered in combination with a biguanide, e.g. metformin. In yet another embodiment of the invention, one or more compounds of the present invention may be administered in combination with a meglitinide, e.g. repaglinide or 5 nateglinide. In still another embodiment of the invention, one or more compounds of the present invention may be administered in combination with a thiazolidinedione insulin sensitizer, e.g. troglitazone, ciglitazone, pioglitazone, rosiglitazone, isaglitazone, darglitazone, englitazone, CS-011/Cl-1 037 or T 174, or a compound disclosed in WO 97/41097, WO 97/41119, WO 10 97/41120, WO 00/41121 and WO 98/45292 (Dr. Reddy's Research Foundation), all of which are incorporated herein by reference. In still another embodiment of the invention, one or more compounds of the present invention may be administered in combination with an insulin sensitizer, e.g. such as GI 262570, YM-440, MCC-555, JTT-501, AR-H039242, KRP-297, GW-409544, CRE-1 6336, 15 AR-H049020, LY510929, MBX-1 02, CLX-0940, GW-501516, or a compound disclosed in WO 99/19313, WO 00/50414, WO 00/63191, WO 00/63192 or WO 00/63193 (Dr. Reddy's Research Foundation) or in WO 00/23425, WO 00/23415, WO 00/23451, WO 00/23445, WO 00/23417, WO 00/23416, WO 00/63153, WO 00/63196, WO 00/63209, WO 00/63190 or WO 00/63189 (Novo Nordisk A/S), all of which are incorporated herein by reference. 20 In a further embodiment of the invention, one or more compounds of the present in vention may be administered in combination with an a-glucosidase inhibitor, e.g. voglibose, emiglitate, miglitol or acarbose. In another embodiment of the invention, one or more compounds of the present in vention may be administered in combination with an agent acting on the ATP-dependent po 25 tassium channel of the p-cells, e.g. tolbutamide, glibenclamide, glipizide, glicazide, BTS 67582 or repaglinide. In yet another embodiment of the invention, one or more compounds of the present invention may be administered in combination with nateglinide. In still another embodiment, one or more compounds of the present invention may 30 be administered in combination with an antihyperlipidemic agent or antilipidemic agent, e.g. cholestyramine, colestipol, clofibrate, gemfibrozil, lovastatin, pravastatin, simvastatin, probu col or dextrothyroxine. In still another embodiment of the invention, one or more compounds of the present invention may be administered in combination with an antilipidemic agent, e.g. cholestyr- 47 amine, colestipol, clofibrate, gemfibrozil, lovastatin, pravastatin, simvastatin, probucol or dex trothyroxine. In another aspect of the invention, one or more compounds of the present invention may be administered in combination with more than one of the above-mentioned com 5 pounds, e.g. in combination with metformin and a sulfonylurea such as glyburide; a sulfony lurea and acarbose; nateglinide and metformin; acarbose and metformin; a sulfonylurea, metformin and troglitazone; insulin and a sulfonylurea; insulin and metformin; insulin, met formin and a sulfonylurea; insulin and troglitazone; insulin and lovastatin; etc. Furthermore, one or more compounds of the present invention may be administered 10 in combination with one or more antihypertensive agents. Examples of antihypertensive agents are p-blockers such as alprenolol, atenolol, timolol, pindolol, propranolol and metoprolol, ACE (angiotensin converting enzyme) inhibitors such as benazepril, captopril, enalapril, fosinopril, lisinopril, quinapril and ramipril, calcium channel blockers such as nifedipine, felodipine, nicardipine, isradipine, nimodipine, diltiazem and verapamil, and a 15 blockers such as doxazosin, urapidil, prazosin and terazosin. Further reference can be made to Remington: The Science and Practice of Pharmacy, 19' Edition, Gennaro, Ed., Mack Pub lishing Co., Easton, PA, 1995. It should be understood that any suitable combination of compounds according to the invention with diet and/or exercise, one or more of the above-mentioned compounds and 20 optionally one or more other active substances are considered to be within the scope of the present invention. The compounds of the present invention may be chiral, and it is intended that any enantiomers, as separated, pure or partially purified enantiomers or racemic mixtures thereof are included within the scope of the invention. 25 Furthermore, when a double bond or a fully or partially saturated ring system or more than one center of asymmetry or a bond with restricted rotatability is present in the molecule diastereomers may be formed. It is intended that any diastereomers, as separated, pure or partially purified diastereomers or mixtures thereof are included within the scope of the invention. 30 Furthermore, some of the compounds of the present invention may exist in different tautomeric forms and it is intended that any tautomeric forms, which the compounds are able to form, are included within the scope of the present invention. The present invention also encompasses pharmaceutically acceptable salts of the present compounds. Such salts include pharmaceutically acceptable acid addition salts, 35 pharmaceutically acceptable metal salts, ammonium and alkylated ammonium salts. Acid 48 addition salts include salts of inorganic acids as well as organic acids. Representative exam ples of suitable inorganic acids include hydrochloric, hydrobromic, hydroiodic, phosphoric, sulfuric, nitric acids and the like. Representative examples of suitable organic acids include formic, acetic, trichloroacetic, trifluoroacetic, propionic, benzoic, cinnamic, citric, fumaric, gly 5 colic, lactic, maleic, malic, malonic, mandelic, oxalic, picric, pyruvic, salicylic, succinic, methanesulfonic, ethanesulfonic, tartaric, ascorbic, pamoic, bismethylene salicylic, ethanedi sulfonic, gluconic, citraconic, aspartic, stearic, palmitic, EDTA, glycolic, p-aminobenzoic, glu tamic, benzenesulfonic, p-toluenesulfonic acids and the like. Further examples of pharma ceutically acceptable inorganic or organic acid addition salts include the pharmaceutically 10 acceptable salts listed in J. Pharm. Sci. 1977, 66, 2, which is incorporated herein by refer ence. Examples of metal salts include lithium, sodium, potassium, magnesium salts and the like. Examples of ammonium and alkylated ammonium salts include ammonium, methylam monium, dimethylammonium, trimethylammonium, ethylammonium, hydroxyethylammonium, diethylammonium, butylammonium, tetramethylammonium salts and the like. 15 Also intended as pharmaceutically acceptable acid addition salts are the hydrates which the present compounds are able to form. The acid addition salts may be obtained as the direct products of compound synthe sis. Alternatively, the free base may be dissolved in a suitable solvent containing the appro priate acid, and the salt isolated by evaporating the solvent or otherwise separating the salt 20 and solvent. Compounds of the present invention may form solvates with standard low molecular weight solvents using methods well known to the person skilled in the art. Such solvates are also to be understood as being within the scope of the present invention. The invention also encompasses prodrugs of the present compounds which follow 25 ing administration undergo chemical conversion by metabolic processes before becoming active pharmacological substances. In general, such prodrugs will be functional derivatives of the present compounds which are readily convertible in vivo into the required compound of the formula 1. Conventional procedures for the selection and preparation of suitable prodrug derivatives are described, for example, in "Design of Prodrugs", ed. H. Bundgaard, Elsevier, 30 1985. The invention also encompasses active metabolites of the present compounds. PHARMACEUTICAL COMPOSITIONS The compounds of the invention may be administered alone or in combination with pharma ceutically acceptable carriers or excipients, in either single or multiple doses. The pharma- 49 ceutical compositions according to the invention may be formulated with pharmaceutically acceptable carriers or diluents as well as any other known adjuvants and excipients in accor dance with conventional techniques, such as those disclosed in Remington: The Science and Practice of Pharmacy, 19th Edition, Gennaro, Ed., Mack Publishing Co., Easton, PA, 1995. 5 The pharmaceutical compositions may be specifically formulated for administration by any suitable route, such as the oral, rectal, nasal, pulmonary, topical (including buccal and sub lingual), transdermal, intracisternal, intraperitoneal, vaginal or parenteral (including subcuta neous, intramuscular, intrathecal, intravenous and intradermal) route, the oral route being preferred. It will be appreciated that the preferred route will depend on the general condition 10 and age of the subject to be treated, the nature of the condition to be treated and the active ingredient chosen. Pharmaceutical compositions for oral administration include solid dosage forms such as capsules, tablets, dragees, pills, lozenges, powders and granules. Where appropri ate, they can be prepared with coatings, such as enteric coatings, or they can be formulated 15 so as to provide controlled release of the active ingredient, such as sustained or prolonged release according to methods well known in the art. Liquid dosage forms for oral administration include solutions, emulsions, suspen sions, syrups and elixirs. Pharmaceutical compositions for parenteral administration include sterile aqueous 20 and non-aqueous injectable solutions, dispersions, suspensions or emulsions as well as ster ile powders to be reconstituted in sterile injectable solutions or dispersions prior to use. De pot injectable formulations are also to be understood as being within the scope of the present invention. Other suitable administration forms include suppositories, sprays, ointments, 25 cremes, gels, inhalants, dermal patches, implants etc. A typical oral dosage is in the range of from about 0.001 to about 100 mg/kg body weight per day, preferably from about 0.01 to about 50 mg/kg body weight per day, and more preferably from about 0.05 to about 10 mg/kg body weight per day, administered in one or more doses, such as from 1 to 3 doses. The exact dosage will depend upon the frequency 30 and mode of administration, the sex, age, weight and general condition of the subject treated, the nature and severity of the condition treated and any concomitant diseases to be treated, and other factors evident to those skilled in the art. The formulations may conveniently be presented in unit dosage form by methods known to those skilled in the art. A typical unit dosage form for oral administration one or 35 more times per day, such as from 1 to 3 times per day, may contain from 0.05 to about 1000 50 mg, preferably from about 0.1 to about 500 mg, and more preferably from about 0.5 mg to about 200 mg of a compound (or a salt or other derivative thereof as set forth above), ac cording to the invention. For parenteral routes, such as intravenous, intrathecal, intramuscular and similar 5 administration, typical doses are of the order of about half the dose employed for oral ad ministration. The compounds of this invention are generally utilized as the free substance or as a pharmaceutically acceptable salt thereof. One example is an acid addition salt of a com pound having a free base functionality. When a compound of the formula I contains a free 10 base functionality, such salts are prepared in a conventional manner by treating a solution or suspension of the free base form of the compound of formula I with a chemical equivalent (acid-base equivalent) of a pharmaceutically acceptable acid. Representative examples of relevant inorganic and organic acids.are mentioned above. Physiologically acceptable salts of a compound of the invention having a hydroxy group include the anion of said compound 15 in combination with a suitable cation, such as sodium or ammonium ion. For parenteral administration, solutions of the novel compounds of the formula I in sterile aqueous solution, aqueous propylene glycol or sesame or peanut oil may be em ployed. Such aqueous solutions should be suitably buffered if necessary, and the liquid dilu ent first rendered isotonic with sufficient saline or glucose. The aqueous solutions are par 20 ticularly suitable for intravenous, intramuscular, subcutaneous and intraperitoneal administra tion. The sterile aqueous media employed are all readily available by standard techniques known to those skilled in the art. Suitable pharmaceutical carriers include inert solid diluents or fillers, sterile aqueous solution and various organic solvents. Examples of solid carriers are lactose, terra alba, su 25 crose, cyclodextrin, talc, gelatine, agar, pectin, acacia, magnesium stearate, stearic acid or lower alkyl ethers of cellulose. Examples of liquid carriers are syrup, peanut oil, olive oil, phospholipids, fatty acids, fatty acid amines, polyoxyethylenes or water. Similarly, the carrier or diluent may include any sustained release material known in the art, such as glyceryl monostearate or glyceryl distearate, alone or mixed with a wax. The pharmaceutical compo 30 sitions formed by combining the novel compounds of the formula I and the pharmaceutically acceptable carriers are then readily administered in a variety of dosage forms suitable for the disclosed routes of administration. The formulations may conveniently be presented in unit dosage form by methods known in the art of pharmacy. Formulations of the present invention suitable for oral administration may be pre 35 sented as discrete units such as capsules or tablets, each containing a predetermined 51 amount of the active ingredient, and which may include a suitable excipient. These formula tions may be in the form of powder or granules, as a solution or suspension in an aqueous or non-aqueous liquid, or as an oil-in-water or water-in-oil liquid emulsion. If a solid carrier is used for oral administration, the preparation may be tabletted, 5 placed in a hard gelatine capsule in powder or pellet form or it can be in the form of a troche or lozenge. The amount of solid carrier may vary widely, but will usually be from about 25 mg to about 1 g. If a liquid carrier is used, the preparation may be in the form of a syrup, emul sion, soft gelatine capsule or sterile injectable liquid, such as an aqueous or non-aqueous liquid suspension or solution. 10 A typical tablet, which may be prepared by conventional tabletting techniques, may in the core contain 5.0 mg of a compound of the invention, 67.8 mg of lactosum Ph. Eur., 31.4 mg of cellulose, microcrystalline (Avicel), 1.0 mg of Amberlite*1RP88 (i.e., Polacrillin po tassium NF, tablet disintegrant, Rohm and Haas) and magnesii stearas Ph. Eur. q.s. with a coating of approximately 9 mg of hydroxypropyl methylcellulose and approximately 0.9 mg of 15 Mywacett 9-40 T (being acylated monoglyceride used as plasticizer for film coating). If desired, the pharmaceutical composition of this invention may comprise the com pound of the formula I in combination with one or more further pharmacologically active sub stances, e.g., substances chosen among those described in the foregoing. Briefly, the compounds of this invention can be prepared in a manner known per se or 20 analogous with known processes. TESTS The ability of the compounds to interact with the histamine H3 receptor can be determined by the following in vitro binding assay. 25 Binding assay The human H3 receptor is cloned by PCR and subcloned into the pcDNA3 expression vector. Cells stably expressing the H3 receptor are generated by transfecting the H3 expression vectors into HEK 293 cells and using G418 to select for H3 clones. The human H3-HEK 293 clones are cultured in DMEM (GIBCO-BRL) with glutamax, 10% foetal calf 30 serum, 1% penicillin/streptavidin and 1 mg/ml G 418 at 37 'C and 5% CO2. Before harvesting, the confluent cells are rinsed with phosphate buffered saline (hereinafter designated PBS) and incubated with Versene (proteinase, GIBCO-BRL) for approximately 5 minutes. The cells are flushed with PBS and DMEM and the cell suspension collected in a tube and centrifuged for 5-10 minutes at 1500 rpm in a Heraeus Sepatech Megafuge 1.0. 35 The pellet is resuspended in 10-20 volumes Hepes buffer (20 mM Hepes, 5 mM MgCl 2 , pH 52 7.1 (KOH)) and homogenized for 10-20 seconds using an Ultra-Turrax homogenizer. The homogenate is centrifuged for 30 minutes at 23,000 g. The pellet is resuspended in 5-10 ml Hepes buffer, homogenized 5-10 seconds with the Ultra-Turrax and centrifuged for 10 minutes at 23,000 g. Following this centrifugation step, the membrane pellet is resuspended 5 in 2-4 ml Hepes buffer, homogenized with a syringe or Teflon homogenizer, and the protein concentration determined. The membranes are diluted to a protein concentration of 1-5 mg/ml in Hepes buffer, aliquoted and kept at -80 OC until use. Aliquots of the membrane suspension are incubated for 60 minutes at 25 *C with 30 pM [ 1 25 ]-iodoproxifan, a known compound with high affinity for the H3 receptor, and the test 10 compound at various concentrations. The incubation is stopped by dilution with ice-cold medium, followed by rapid filtration through Whatman GF/B filters pretreated for 1 hour with 0.5% polyethyleneimine. The radioactivity retained on the filters is counted using a Cobra 11 auto gamma counter. The radioactivity of the filters is indirectly proportional to the binding affinity of the tested compound. The results are analysed by nonlinear regression analysis. 15 When tested, the present compounds of the formula (1) generally show a high binding affinity to the histamine H3 receptor. Preferably, the compounds according to the invention have an IC50 value as deter mined by one or more of the assays of less than 10 pM, more preferred of less than 1 pM, and even more preferred of less than 500 nM, such as of less than 100 nM. 20 Functional assay I The ability of the compounds to interact with the histamine H3 receptor as agonists, inverse agonists and/or antagonists, is determined by an in vitro functional assay utilizing membranes from HEK 293 cells expressing the human H3 receptors. The H3 receptor is cloned by PCR and subcloned into the pcDNA3 expression vector. 25 Cells stably expressing the H3 receptor are generated by transfecting the H3-expression vectors into HEK 293 cells and using G418 to select for H3 clones. The human H3-HEK 293 clones are cultured in DMEM with glutamax, 10% foetal calf serum, 1 % penicillin/streptavidin and 1 mg/mI G 418 at 37 0C and 5% C02. The H3 receptor expressing cells are washed once with PBS and harvested using 30 versene (GIBCO-BRL). PBS is added and the cells are centrifuged for 5 minutes at 188 g. The cell pellet is resuspended in stimulation buffer to a concentration of 1 x 106 cells/ml. cAMP accumulation is measured using the Flash Platee cAMP assay (NEN T M Life Science Products). The assay is generally performed as described by the manufacturer. Briefly, 50 l cell suspension is added to each well of the Flashplate which also contained 25 pl 40 PM 53 isoprenaline, to stimulate cAMP generation, and 25 pl of test compound (either agonists or inverse agonists alone, or agonist and antagonist in combination). The assay can be run in "agonist-mode" which means that the test compound is added, in increasing concentration, on its own, to the cells, and cAMP is measured. If cAMP goes up, it is an inverse agonist; if 5 cAMP does not change, it is a neutral antagonist, and if cAMP goes down, it is an agonist. The assay can also be run in the "antagonist-mode" which means that a test compound is added, in increasing concentrations, together with increasing concentrations of a known H3 agonist (e.g. RAMHA). If the compound is an antagonist, increasing concentrations of it cause a right-ward shift in the H3-agonist's dose-response curves. The final volume in each 10 well is 100 pl. Test compounds are dissolved in DMSO and diluted in water. The mixture is shaken for 5 minutes, and allowed to stand for 25 minutes at room temperature. The reaction is stopped with 100 pl "Detection Mix" per well. The plates are then sealed with plastic, shaken for 30 minutes, allowed to stand overnight, and finally the radioactivity is counted in the Cobra Il auto gamma topcounter. ECso values are calculated by non-linear regression 15 analysis of dose response curves (6 points minimum) using GraphPad Prism. Kb values are calculated by Schild plot analysis. Preferably, the antagonists and agonists according to the invention have an IC5oEC5o value of less than 10 pM, more preferred of less than 1 pM, and even more preferred of less than 500 nM, such as of less than 100 nM. 20 Functional assay || The ability of the compounds to bind and interact with the human H3 receptor as agonists, inverse agonists and/or antagonists, is determined by a functional assay, named [35s] GTPTS assay. The assay measures the activation of G proteins by catalyzing the exchange of guanosine 5'-diphosphate (hereinafter designated GDP) by guanosine 5'-triphosphate 25 (hereinafter designated GTP) at the a-subunit. The GTP-bounded G proteins dissociate into two subunits, G GTP and G , which in turn regulate intracellular enzymes and ion channels. GTP is rapidly hydrolysed by the G -subunit (GTPases) and the G protein is deactivated and ready for a new GTP exchange cycle. To study the function of ligand induced G protein coupled receptor (GPCR) activation by an increase in guanine nucleotide 30 exchange at the G proteins, the binding of [ 35 S]-guanosine-5'-0-(3-thio) triphosphate (hereinafter designated [ 35 S GTP S), a non-hydrolysed analogue of GTP, is determined. This process can be monitored in vitro by incubating cell membranes containing the G protein coupled receptor H3 with GDP and ["S] GTPyS. Cell membranes are obtained from CHO cells stably expressing the human H3 receptor. The cells are washed twice in PBS, 54 harvested with PBS + 1 mM EDTA, pH 7.4 and centrifuged at 1000 rpm for 5 minutes. The cell pellet is homogenized in 10 ml ice-cold Hepes buffer (20 mM Hepes, 10 mM EDTA, pH 7.4 (NaOH)) using an Ultra-Turrax homogenizer for 30 seconds and centrifuged for 15 minutes at 20,000 rpm. Following this centrifugation step, the membrane pellet is 5 resuspended in 10 ml ice-cold Hepes buffer (20 mM Hepes, 0.1 mM EDTA, pH 7.4 (NaOH)) and homogenized as describe above. This procedure is repeated twice except for the last homogenization step, the protein concentration is determined and membranes are diluted to a protein concentration at 2 mg/ml, aliquoted and kept at -80 *C until use. In order to study the presence and the potency of an inverse agonist/antagonist, the 10 H3-receptor agonist ligand R-a-methyl histamine (hereinafter designated RAMHA) is added. The ability of the test compound to counteract the effect of RAMHA is measured. When studying the effect of an agonist, RAMHA is not added to the assay medium. The test compound is diluted in the assay buffer (20 mM HEPES, 120 mM NaCl, 10 mM MgCl 2 pH 7.4 (NaOH)) at various concentrations followed by addition of 10-8 nM RAMHA (only in the case 15 where an inverse agonist/antagonist is examined), 3 pM GDP, 2.5 pg membranes, 0.5 mg SPA beads and 0.1 nM [ 3 1S] GTPyS and incubated for 2 hours by slightly shaking at room temperature. The plates are centrifuged at 1500 rpm for 10 minutes and the radioactivity is measured using a Top-counter. The results are analyzed by non linear regression and the ICso value is determined. 20 RAMHA and other H3 agonists stimulate the binding of [3sS] GTPyS to membranes expressing the H3 receptor. In the antagonist/inverse agonist test, the ability of increasing amounts of test compound to inhibit the increased [ 3 "S] GTPyS binding by 10~8 M RAMHA is measured as a decrease in radioactivity signal. The ICso value determined for an antagonist is the ability of this compound to inhibit the effect of 10- 8 M RAMHA by 50%. In the agonist 25 test, the ability of increasing amounts of test compound is measured as an increase in radioactivity signal. The ECso value determined for an agonist, is the ability of this compound to increase the signal by 50% of the maximal signal that is obtained by 10-5 M RAMHA. Preferably, the antagonists and agonists according to the invention have an IC 5 dEC 5 o value of less than 10 pM, more preferred of less than 1 pM, and even more preferred of less 30 than 500 nM, such as of less than 100 nM. Test of food intake inhibition In this type of test rats are acclimatized to the experimental environment for 1-2 weeks before the start of experiments. About 7-10 days before recording of food intake access to 35 food is restricted to 5-7 hours per day. Water remains freely available. On the test day, 55 groups (n=1 0) of animals receive single administrations of histamine H3 receptor antagonists shortly before presentation of food. After this, food consumption is recorded for 3 h. Preferred compounds are those that produce a statistically significant reduction of 3-hour cumulated food intake. More preferred compounds are those that decrease 3-hour cumulated food 5 intake with 10-20 % and the most preferred compounds reduce 3-cumulated food intake with more than 20% without sedation of the animals. Test of body weight reduction 10 This test is carried out in rats that have become obese due to over-consumption of dietary energy, i.e. a sustained positive energy balance. Animals are being exposed to the test compound for 7 days. Preferred compounds are those that produce a statistically significant decrease of body weigh compared with control rats given vehicle. More preferred compounds are those that produce a weight reduction of at least 4%, compared with the 15 vehicle control group, and the most preferred compounds are those that reduce body weight with more than 8% compared with vehicle control rats. GENERAL COMMENTS All references, including publications, patent applications, and patents, cited herein are 20 hereby incorporated by reference in their entirety and to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein (to the maximum extent permitted by law). All headings and sub-headings are used herein for convenience only and should not be construed as limiting the invention in any way. 25 The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the inven tion. 30 The citation and incorporation of patent documents herein is done for convenience only and does not reflect any view of the validity, patentability and/or enforceability of such patent documents. The mentioning herein of references is no admission that they constitute prior art. Herein, the word "comprise" is to be interpreted broadly meaning "include", "contain" or 35 "comprehend" (EPO guidelines C 4.13).

56 This invention includes all modifications and equivalents of the subject matter re cited in the claims appended hereto as permitted by applicable law. GENERAL EXPERIMENTAL PROCEDURES 5 NMR spectra were recorded at 300 and 400 MHz on a Bruker DRX300, Avance 300, DRX400 or AV400 instrument equipped with 5 mm selective-inverse (SEI, 'H and '3C), 5 mm broad-band inverse (BBI, 'H, broad-band) and 5 mm quadro nuclear (QNP, 'H, '3C) probe heads, respectively. Shifts (6) are given in parts per million (ppm) down field from tetrame thylsilane as internal reference standard. 10 HPLC Method A. The RP-analyses was performed on a Merck-Hitachi series 7000 system (Merck-Hitachi pump L-71 00 and Merck-Hitachi autosampler L-7200 or Rheodyne sample injector) using a HibarTM RT 250-4, LichrosorbTM RP-1 8, 5.0 gm, 4.0 x 250 mm; gra dient elution, 20 % to 80 % solvent B (0.1% TFA in acetonitrile) in solvent A (0.1% TFA in water) within 30 min, 1.0 ml/min, detection at 210 nm, temperature 300C. 15 HPLC Method B. The RP-purification was performed on a Gilson system (3 Gilson 306 pumps, Gilson 170 DAD detector and a Gilson 215 liquid handler) using a Waters XTerra* Prep RP1 8 (10 pm, 30 mm x 150 mm) with gradient elution, 5% to 95% solvent B (acetonitrile) in solvent A (0.05% TFA in water) within 15 min, 40 mL/min, detection at 210 nm, temperature rt. The pooled fractions are either evaporated to dryness in vacuo, or 20 evaporated in vacuo until the acetonitrile is removed, and then frozen and freeze dried. HPLC Method C. The RP-analyses was performed on a Shimadzu LC-20 using a YMC-ODS, 5.0 pm, 4.6 x 50 mm; gradient elution, 0 % to 30 % solvent B (0.1% TFA in ace tonitrile) in solvent A (0.1% TFA in water) within 6 min, and then kept for 2 min, 2.5 mL/min, detection at 220 nm, temperature 300C. 25 HPLC Method D. The RP-analyses was performed on a Shimadzu LC-20 using a YMC-ODS, 5.0 sm, 4.6 x 50 mm; gradient elution, 0 % to 60 % solvent B (0.1% TFA in ace tonitrile) in solvent A (0.1% TFA in water) within 8 min, and then kept for 2 min, 2.5 mL/min, detection at 220 nm, temperature 30CC. HPLC Method E. The RP-analyses was performed on a Shimadzu using a YMC 30 ODS, 5.0 pm, 4.6 x 50 mm; gradient elution, 10 % to 80 % solvent B (0.1% TFA in acetoni trile) in solvent A (0.1% TFA in water) within 6 min, and then kept for 2 min, 2.5 mL/min, de tection at 220 nm, temperature 300C. HPLC Method F. The RP-purification was performed on a Gilson Nebula Series system using a Luna, 5 pm, 21.2 mm x 250 mm with gradient elution, 5% to 30% solvent B 35 (0.1 % TFA in acetonitrile) in solvent A (0.1 % TFA in water) within 15 min, 80 mL/min, detec- 57 tion at 220 nm, temperature 250C, injection volume 30 mL. The pooled fractions were evapo rated in vacuo until acetonitrile was removed, and then frozen and dried. HPLC-MS Method G. Column: Waters Xterra MS C-18 X 3 mm id. Buffer: Linear gradient 5% - 95% in 4 min, acetonitrile, 0.01 % TFA, flow rate 1.0 ml/min. Detection 210 nm 5 (analog output from diode array detector), MS-detection ionisation mode API-ES, scan 100 1000 amu step 0.1 amu. Microwave Synthesis. When microwave oven synthesis was applied, the reaction was heated by microwave irradiation in sealed microwave vessels in a single mode Emrys Optimizer EXP from PersonalChemistry*. 10 The examples below and the general procedures described herein refer to intermediate compounds and final products for general formula I identified in the specification and in the synthesis schemes. The preparation of the compounds of general formula I of the present invention is described in detail using the following examples. Occasionally, the reaction may 15 not be applicable as described to each compound included within the disclosed scope of the invention. The compounds for which this occurs will be readily recognised by those skilled in the art. In these cases, the reactions can be successfully performed by conventional modifi cations known to those skilled in the art which is, by appropriate protection of interfering groups, by changing to other conventional reagents, or by routine modification of reaction 20 conditions. Alternatively, other reactions disclosed herein or otherwise conventional will be applicable to the preparation of the corresponding compounds of the invention. In all prepa rative methods, all starting materials are known or may be prepared by a person skilled in the art in analogy with the preparation of similar known compounds or by the General Proce dures A through N described herein. The following examples are offered by way of illustra 25 tion, not by limitation. General Procedure A Compounds of the formula 1, wherein Y and/or W is -N=, and A, X, Z, and R' each is as de fined for formula 1, which compounds here are designated formula la, can be prepared as 30 outlined below: "H H X A X A (A-1) (a) Hal' y " (A-1) (A-2) 58 An amine of formula A-1, wherein R 1 is as defined herein, may be reacted with a halogen substituted heteroaryl of the formula A-2 wherein A, X, Y, Z, and W each is as defined herein, and Hal represents chlorine or bromine, to give a compound of formula Ia. This reac tion may be carried out in a suitable solvent like, for example, dimethylsulf oxide, at a tem 5 perature of up to reflux. Compounds of formula A-2 may be prepared according to known procedures described in, for example, WO 03/066604A2, Tetrahedron 2000, 56, 9655-9662, and Tetrahedron Lett. 2001, 42, 2779-2781. General procedure B 10 Compounds of the formula 1, wherein A is aryl or heteroaryl optionally substituted with R

(C=O)NHCH

2 -, and X, Y, Z, W, and R' each is as defined for formula 1, which compounds here are designated formula Ib, can be prepared as outlined below: O Yor A R OH R CI H NH2 (B-5) or (BA) Ny R 0 O X X A _A1 X A O A WXYA R 0 R W R Y R Y (B3) R Y(b) (B-1) (B-2) An amine of formula B-2, wherein X, Y, Z, W and R' each is as defined herein, and A repre 15 sents an aryl or heteroaryl group, may be acylated with an activated carboxylic acid deriva tive to give a compound of formula lb. Such an activated carboxylic acid derivative can be a carboxylic acid chloride or anhydride of formula B-4 or B-3, respectively. This reaction may be carried out in a suitable solvent like, for example, dichloromethane or acetic acid, at a temperature of up to reflux. A carboxylic acid of formula B-5 may also be reacted with an 20 amine of formula B-2 to give an amide of formula lb. This reaction may be carried out by ac tivation of the carboxylic acid with, for example, HOBt/EDAC in a suitable solvent like, for ex ample, THF and at a temperature of up to reflux. Compounds of formula B-2 may be pre pared by hydrogenation of a nitril of formula B-1, wherein X, Y, Z, W and R' is as defined herein, and A represents an aryl or heteroaryl group. This reaction may be carried out in a 25 suitable solvent like, for example, THF, at a temperature of up to reflux in the presence of a reducing agent like, e.g., LiAIH 4 . Compounds of formula B-1 may be may be prepared ac cording to other General Procedure(s) described herein. General procedure C 59 Compounds of the formula 1, wherein A is aryl or heteroaryl, and X, Y, Z, W, and R' each is as defined for formula I, which compounds here are designated formula Ic, can be prepared as outlined below: 0 R NH N0 ? R Cl I_ NH rNNor W , A X YJA R O R W ''X A R YR (C-3) R Y (C-1) (C-2) 5 A hydroxyamidine of formula C-2, wherein X, Y, Z, W and R 1 each is as defined herein, and A represents an aryl or heteroaryl group, may be reacted with a carboxylic acid chloride or anhydride of formula C-3 to give a compound of formula Ic. This reaction may be carried out in a suitable solvent like, e.g., NN-dimethylacetamide or acetic acid, at a temperature of up to reflux. Compounds of formula C-2 may be prepared by reaction of a nitril of formula C-1, 10 wherein X, Y, Z, W and R 1 is as defined herein, and A represents an aryl or heteroaryl group, with hydroxylamine. This reaction may be carried out in a suitable solvent like, for example, ethanol and water, at a temperature of up to reflux in the presence of a base like, for exam ple, potassium carbonate. Compounds of formula C-1 may be may be prepared according to other General Procedure(s) described herein. 15 General procedure D Compounds of the formula 1, wherein X, Y, Z, W, and R 1 each is as defined for formula 1, which compounds here are designated formula Id, can be prepared as outlined below: 0 R Cl NOH or N-O W1W

NH

2 R O R W N R YZR YZ (D-3) R YZ (d (D-1) (D-2) 20 A hydroxyamidine of formula D-2, wherein X, Y, Z, W and R 1 is as defined herein, may be reacted with a carboxylic acid chloride or anhydride of formula D-3 to give a compound of formula Id. This reaction may be carried out in a suitable solvent like, for example, N,N-di- 60 methylacetamide or acetic acid, at a temperature of up to reflux. Compounds of formula D-2 may be prepared by reaction of a nitril of formula D-1, wherein X, Y, Z, W and R' each is as defined herein, with hydroxylamine. This reaction may be carried out in a suitable solvent like, for example, ethanol and water, at a temperature of up to reflux in the presence of a 5 base like, for example, potassium carbonate. General procedure E Compounds of the formula 1, wherein X, Y, Z, W, and R' are as defined for formula 1, which compounds here are designated formula le, can be prepared as outlined below: W N R H W N Hal iNR R IY "Z R Y 'Z (le) R' (E-2) 10 (E-1) A benzylhalogenide of formula E-1, wherein X, Y, Z, W and R 1 each is as defined herein, and Hal represents chlorine, bromine or iodine, may be reacted with an amine of formula E-2 to give a compound of formula le. This reaction may be carried out in a suitable solvent like, for example, ethanol, at a temperature of up to reflux and in the presence of a base like, for ex 15 ample, triethylamine, or excess of the amine of formula E-2. Compounds of formula E-1 may be prepared according to the General Procedure D described above. General procedure F Compounds of the formula I, wherein R" is represented by Rlla-CH-Rl1b, and q, A, X, Y, W 20 and Z each is as defined for formula I, which compounds here are designated formula If, can be prepared as outlined below: RIla ONA RN Y RT HNN R lib HNj.. (If)Y -i' (F-1) (F-2) R A carbonyl compound of formula F-1, wherein R 11 a and Rlb each is as defined herein, may be reacted with an amine of the formula F-2, wherein q, A, X, Y, Z, and W are as defined 25 herein, in the presence of a reducing agent, to give a compound of formula If. This reaction 61 may be carried out in a suitable solvent like, for example, tetrahydrofuran or 1,2-dichloro ethane, at a temperature of up to reflux. The reducing agent may be, for example, NaCNBH 3 or NaBH(OAc),, eventually in the presence of a acidic catalyst like, for example, acetic acid. Compounds of formula F-2 may be may be prepared according to other General Proce 5 dure(s) described herein. General procedure G Compounds of the formula 1, wherein A is aryl or heteroaryl optionally substituted with a group of the general formula R-(C=O)-, and R, X, Y, Z, W, and R' each is as defined for for 10 mula I, which compounds here are designated formula Ig, can be prepared as outlined be low: N Hal\ ,R 0 R (Mg y A LYA W (G-2)W Rl Y Z R R YZ Z1g Li " (G-1) (G-3) A cyano compound of formula G-1, wherein X,Y,Z, W and R 1 is as defined herein, and A represents an aryl or heteroaryl group, may be reacted with a organometallic compound of 15 formula G-2 or G-3, followed by acidic hydrolysis with, for example, aqueous hydrochloric acid, to give a compound of formula Ig. This reaction may be carried out in a suitable solvent like, for example, tetrahydrofuran or tetrahydrofuran/toluene, at a temperature of up to reflux. Compounds of formula G-1 may be may be prepared according to other General Proce dure(s) described herein. 20 General procedure H Compounds of the formula 1, wherein R", q, A, X, Y, W and Z are as defined for formula I, which compounds here are designated formula lh, can be prepared as outlined below: R a-N A N N X A SHN R (H-1) (H-2) 62 A compound of formula H-1, wherein Hal represents chlorine, bromine or iodine, may be re acted with an amine of the formula H-2, wherein q, A, X, Y, Z, and W are as defined herein, to give a compound of formula lh. This reaction may be carried out in a suitable solvent like, for example, dimethylformamide, dimethylsulf oxide, acetonitril or 2-butanone, at a tempera 5 ture of up to reflux. The reaction may be carried out in the presence of a base such as, for example, sodium hydride, potassium carbonate or NN-diisopropylethylamine, and a catalyst like, for example, potassium iodide. Compounds of formula H-2 may be may be prepared ac cording to other General Procedure(s) described herein. 10 General procedure I Compounds of the formula 1, wherein A, X, Y, W, Z and R' each is as defined for formula 1, which compounds here are designated formula Ii, can be prepared as outlined below: 1 X Hal + H O I;X A YI + ",BI, || R, Z A O H R Y -Z (ii)" (I-i)(1-2) A compound of formula 1-1, wherein X, Y, W, Z and R 1 each is as defined herein, and Hal 15 represents chlorine, bromine or iodine, may be reacted with a boronic acid derivative of the formula 1-2, or a corresponding boronic acid ester derivative, wherein A is as defined herein, to give a compound of formula li. This reaction may be carried out in a suitable solvent like, for example, acetonitrile/water, at a temperature of up to 1500C in the presence of a suitable catalyst like, for example, bistriphenylphosphinpalladium(II)dichloride and sodium carbonate. 20 This reaction may also be performed in the other way round starting from reactants wherein the halogen and boronic acid moieties have been interchanged. This reaction may be carried out under similar conditions as described above. General procedure J Compounds of the formula I, wherein A is aryl or heteroaryl optionally substituted with 25 -C(=O)-NR'R, and X, Y, Z, W, and R each is as defined for formula 1, which compounds here are designated formula lj, can be prepared as outlined below: 63 R N O OH O N, 1R R WX A W: AR' W R Y, Z Y, Z , R I YZ A R (J-3) (J-1) (J-2) A carboxylic acid of formula J-2, wherein A, X, Y, Z, W, and R 1 each is as defined herein, may be reacted with an amine of formula R'RNH to give an amide of formula lj. This reaction may be carried out by activation of the carboxylic acid with, for example, HOBt/EDAC in a 5 suitable solvent like, for example, THF and at a temperature of up to reflux. A carboxylic acid of formula J-2 may be prepared by hydrolysis of a nitrile of formula J-1, wherein A, X, Y, Z, W, and R' each is as defined herein. This reaction may be carried out under strong acidic conditions, for example, in 6 N hydrochloric acid at a temperature of up to reflux. Compounds of formula J-1 may be prepared according to other General Procedure(s) described herein. 10 General procedure K Compounds of the formula 1, wherein A is aryl or heteroaryl optionally substituted with -CH-NR'R, and X, Y, Z, W, and R' each is as defined for formula I, which compounds here are designated formula Ik, can be prepared as outlined below: R N O N, HR' HN R WX A WX A H RX A R YtZ R YZ I -Z (K-3) R Y 15 (-i) (K-2) A carboxaldehyde of formula K-2, wherein A, X, Y, Z, W, and R' each is as defined herein, may be reacted with an amine of formula R'RNH under reducing conditions to give an amine of formula Ik. This reaction may be carried out in a suitable solvent like, for example, tetrahy drofuran or 1,2-dichloroethane, at a temperature of up to reflux. The reducing agent may be, 20 for example, NaCNBH 3 or NaBH(OAc) 3 , eventually in the presence of a acidic catalyst like, for example, acetic acid. A carboxaldehyde of formula K-2 may be prepared from a nitrile of formula K-1, wherein A, X, Y, Z, W, and R 1 each is as defined herein. This reaction may be carried out in the presence of a reducing agent, for example, DIBAL-H or LiAIH 4 in a suitable solvent, for example, THF at a temperature from - 40 0C up to reflux. Compounds of formula 25 K-1 may be prepared according to other General Procedure(s) described herein.

64 General procedure L Compounds of the formula 1, wherein A is aryl or heteroaryl optionally substituted with R-C(=O)NH-, and X, Y, Z, W, and R' each is as defined for formula I, which compounds here 5 are designated formula 11, can be prepared as outlined below: 0 0 or -K R ) OH orR CI O -O NH R (L- 5 ) or (L-4) HN R N NH2 HN R W x AW R R W A R Y R Y (L-3) R Y ei) (L1) (L-2) An aromatic amine of formula L-2, wherein X, Y, Z, W and R 1 each is as defined herein, and A represents an aryl or heteroaryl group, may be acylated with an activated carboxylic acid derivative to give a compound of formula 11. Such an activated carboxylic acid derivative can 10 be a carboxylic acid chloride or anhydride of formula L-4 or L-3, respectively. This reaction may be carried out in a suitable solvent like, for example, dichloromethane or acetic acid, at a temperature of up to reflux. A carboxylic acid of formula L-5 may also be reacted with an amine of formula L-2 to give an amide of formula 11. This reaction may be carried out by acti vation of the carboxylic acid with, for example, HOBt/EDAC in a suitable solvent like, for ex 15 ample, THF and at a temperature of up to reflux. Compounds of formula L-2 may be pre pared by hydrogenation of a nitro compound of formula L-1, wherein X, Y, Z, W and R' is as defined herein, and A represents an aryl or heteroaryl group. This reaction may be carried out in a suitable solvent like, for example, ethanol and/or water, at a temperature of up to re flux in the presence of a reducing agent, for example, Fe powder. Other reducing conditions 20 may be hydrogenation with hydrogen gas in the presence a suitable catalyst, for example, Pd/C at a pressure up to 3000 psi. Compounds of formula L-1 may be may be prepared ac cording to other General Procedure(s) described herein. General procedure M Compounds of the formula I, wherein A is aryl or heteroaryl optionally substituted with 25 R-(CH) 2 -0-, and X, Y, Z, W, and R' each is as defined for formula I, which compounds here are designated formula Im, can be prepared as outlined below: 65 H R LG R XR A WXr A(M-2) 1X A R YZR Y Ri__N R 'J~ ,z (Im) (M-1) An aromatic alcohol of formula M-1, wherein X, Y, Z, W and R 1 each is as defined herein, and A represents an aryl or heteroaryl group, may be alkylated with a compound of formula M-2, wherein LG represents a suitable leaving group such as, for example, halogen or mesy 5 late. This reaction may be carried out in a suitable solvent like, for example, DMF, at a tem perature of up to reflux and in the presence of a base like, for example, sodium hydride. Compounds of formula M-1 may be may be prepared according to other General Proce dure(s) described herein. General procedure N 10 Compounds of the formula 1, wherein A is aryl or heteroaryl optionally substituted with a cyclic sulphonamide and wherein p is 1-4, and X, Y, Z, W, and R' each is as defined for formula 1, which compounds here are designated formula In, can be prepared as outlined be low: O LG2 0. // I S (CH 2 )P LG O/ NH// | 2 HN ;'S ,(CH 2 )P NH 2 ,S (CH 2 )p O I~ A ,y A LG ,X A ,X A W I (N-2) W W R1 y Z R Y Z R YN Z (In) (N-1) (N-3) 15 An aromatic amine of formula N-1, wherein X, Y, Z, W and R 1 each is as defined herein, and A represents an aryl or heteroaryl group, may be reacted with an activated sulfonic acid of formula N-2, wherein p is 1-4 and LG 1 and LG 2 represents suitable leaving groups such as, for example, halogen, to give a compound of formula N-3. This reaction may be carried out in a suitable solvent like, for example, DMF, at a temperature of up to reflux and in the pres 20 ence of a base like, for example, TEA. A compound of formula N-3 may be ring-closed to give a compound of formula In. This reaction may be carried out in a suitable solvent like, for example, DMF, at a temperature of up to ref lux and in the presence of a base like, for exam- 66 ple, NaH. Compounds of formula N-1 may be may be prepared according to other General Procedure(s) described herein. 5 Example 1 (General procedure A) 1-[5-(4-Chlorophenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride CI rN N H3C iN,, 2 HCI

CH

3 A mixture of 2-chloro-5-(4-chlorophenyl)pyridine (500 mg, 2.23 mmol), DMSO (2.0 mL) and 1-isopropylpiperazine (3 mL, 23.4 mmol) was stirred and heated on a 1004C oil-bath over 10 night. The reaction mixture was poured into water (75 mL), and the solid was isolated by fil tration, washed with water and dried. The crude product was purified by column chromatog raphy on silica gel (Kiselgel 60, mesh 0.040-0.63) eluting with a mixture of ethyl acetate and methanol (4:1). Collecting the proper fractions afforded 600 mg (85 %) of 1-[5-(4-chloro phenyl)pyridin-2-yl]-4-isopropylpiperazine. 15 'H NMR (300 MHz, CDC1) 6 1.10 (d, 6H), 2.63-2.68 (m, 4H), 2.75 (hept, 1H), 3.59-3.66 (m, 4H), 6.69 (d, 1 H), 7.35-7.45 (m, 4H), 7.67 (dd, 1 H), 8.40 (d, 1 H). The free base was dissolved into a mixture of a 0.5 N hydrochloric acid solution and ethanol. When dissolved, the mixture was evaporated and then re-evaporated with ethanol. The solid residue was recrystallized from ethanol (50 mL) to give 740 mg (81 %) of 1-[5-(4-chloro 20 phenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride. 'H NMR (300 MHz, DMSO-d 6 ) 6 1.32 (d, 6H), 3.05-3.22 (m, 2H), 3.45-3.67 (m, 5H), 4.49 4.61 (m, 2H), 4.9 (brs, 6H), 7.23-7.31 (m, 1H), 7.52 (d, 2H), 7.73 (d, 2H), 8.13-8.19 (m, 1H), 8.42-8.46 (m, 1 H), 11.4 (brs, 1 H). Microanalysis for C1 8

H

2 2

CIN

3 , 2 x HCI, 2.5 x H 2 0: 25 Calculated: C: 49.84%; H: 6.74%; N: 9.69%; Found: C: 49.82%; H: 6.66%, N: 9.36%. Example 2 (General procedure A) 1- Isopropyl-4-[5-(4-methoxyphenyl)pyridin-2-yl]piperazine, dihydrochloride 67 N O'CH3

H

3 C N 2 HCI

OH

3 A mixture of 2-chloro-5-(4-methoxyphenyl)pyridine (200 mg, 0.91 mmol), dry DMSO (2.0 mL) and 1-isopropylpiperazine (500 mg, 3.9 mmol) was stirred and heated on a 1300C oil-bath overnight, then at 1500C for 4 h, left 2 days at rt and finally heated at 1400C overnight. The 5 reaction mixture was allowed to cool and then poured into water (100 mL). The mixture was extracted with ethyl acetate (100 mL), and the organic extract was washed with water and dried (MgSO 4 ). The solvent was evaporated to give a solid residue which was dissolved into 0.5 N hydrochloric acid (20 mL). A small insoluble solid was removed by filtration, and the aqueous solution was evaporated to give a residue which was re-evaporated with absolute 10 ethanol. The resulting solid was re-crystallised from absolute ethanol to give 210 mg (60 %) of 1-[5-(4-methoxyphenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride. 'H NMR (400 MHz, CDCl 3 ) 6 1.51 (d, 6H), 3.23-3.34 (m, 2H), 3.49-3.59 (m, 1H), 3.60-3.67 (m, 2H), 3.86 (s, 3H), 4.30-4.40 (m, 2H), 4.64-4.71 (m, 2H), 7.00 (d, 2H), 7.19 (d, 1 H), 7.43 (d, 2H), 8.20 (d, 1 H), 8.31 (s, 1 H), 12.9 (brs, 1 H). 15 Microanalysis for C 19

H

25

N

3 0, 2 x HCI, 3 x H 2 0: Calculated: C: 52.06%; H: 7.59%; N: 9.58%; Found: C: 51.99%; H: 7.47%, N: 9.21%. Example 3 (General procedure A) 20 1-Isopropyl-4-[5-(4-trifluoromethoxyphenyl)pyridin-2-yl]piperazine, dihydrochloride O F CQ FF N N HOC N... CY 2 HCI

OH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-trifluoromethoxyphenyl)pyridine and 1 -isopropylpiperazine. Mp = 271-2734C.

68 'H NMR (300 MHz, DMSO-d) 6 1.32 (d, 6H), 3.05-3.21 (m, 2H), 3.45-3.67 (m, 5H), 4.50 4.61 (m, 2H), 7.28 (d, 1H), 7.46 (d, 2H), 7.82 (d, 2H), 8.17 (d, 1H), 8.46 (s, 1H), 11.4 (brs, 1 H). Microanalysis for C 19 H22F 3

N

3 0, 2 x HCI: 5 Calculated: C: 52.06%; H: 5.52%; N: 9.59%; Found: C: 52.07%; H: 5.53%, N: 9.36%. Example 4 (General procedure A) 1-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}ethanone, dihydrochloride

CH

3 (N N HC N 2 HCI 10 CH3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-acetylphenyl)pyridine and 1 -isopropylpiperazine. Mp = 288-2900C. 'H NMR (300 MHz, DMSO-d 6 ) 6 1.32 (d, 6H), 2.61 (s, 3H), 3.05-3.22 (m, 2H), 3.40-3.67 (m, 15 5H), 4.51-4.62 (m, 2H), 7.27 (d, 1H), 7.86 (d, 2H), 8.03 (d, 2H), 8.22 (d, 1H), 8.55 (s, 1H), 11.4 (brs, 1H). Microanalysis for C20H 25

N

3 0, 2 x HCI, 1.25 x H 2 0: Calculated: C: 57.35%; H: 7.10%; N: 10.03%; Found: C: 57.06%; H: 7.05%, N: 9.78%. 20 Example 5 (General procedure A) 1-[5-(2,6-Difluorophenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride F N N F HC N

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, 25 starting from 2-chloro-5-(2,6-difluorophenyl)pyridine and 1 -isopropylpiperazine.

69 'H NMR (300 MHz, DMSO-d) 6 1.33 (d, 6H), 3.05-3.20 (m, 2H), 3.44-3.65 (m, 5H), 4.50 4.60 (m, 2H), 7.19-7.31 (m, 3H), 7.43-7.54 (m, 1H), 7.88 (d, 1H), 8.24 (s, 1H), 11.4 (brs, 1 H). Microanalysis for C 18

H

21

F

2

N

3 , 2 x HCI, 0.5 x H 2 0: Calculated: C: 54.14%; H: 6.06%; N: 10.52%; 5 Found: C: 54.02%; H: 6.04%, N: 10.25%. Example 6 (General procedure A) 1-[5-(4-Fluorophenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride F N N N H3C NJ 2 HCI

CH

3 10 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-fluorophenyl)pyridine and 1 -isopropylpiperazine. 'H NMR (300 MHz, DMSO-d) 5 1.32 (d, 6H), 3.06-3.20 (m, 2H), 3.45-3.67 (m, 5H), 4.49 4.59 (m, 2H), 7.25-7.35 (m, 3H), 7.70-7.77 (m, 2H), 8.15 (d, 1 H), 8.40 (s, 1 H), 11.4 (brs, 1 H). Microanalysis for C 18 H2FN 3 , 2 x HCl, 3.5 x H 2 0: 15 Calculated: C: 49.66%; H: 7.18%; N: 9.65%; Found: C: 50.01%; H: 7.05%, N: 9.47%. Example 7 (General procedure A) 1-[5-(3-Fluorophenyl)pyridin-2-yl]-4-isopropylpiperazine, hydrochloride F N N H3C NJ.) 20 CH3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(3-fluorophenyl)pyridine and 1 -isopropylpiperazine. 1 H NMR (300 MHz, DMSO-d) 6 1.32 (d, 6H), 2.99-3.14 (m, 2H), 3.36-3.67 (m, 5H), 4.45 4.55 (m, 2H), 7.06-7.19 (m, 2H), 7.43-7.57 (m, 3H), 8.02 (d, 1 H), 8.55 (s, 1 H), 11.0 (brs, 1 H). 25 Microanalysis for C 18 H2FN 3 , HCI, 0.5 x H 2 0: Calculated: C: 62.69%; H: 7.01%; N: 12.18%; 70 Found: C: 62.93%; H: 6.88%, N: 11.91%. Example 8 (General procedure A) 1-[5-(2-Fluorophenyl)pyridin-2-yl]-4-isopropylpiperazine, dihydrochloride N N 5 CH 3 2HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(2-fluorophenyl)pyridine and 1 -isopropylpiperazine. 'H NMR (300 MHz, DMSO-d) 6 1.33 (d, 6H), 3.06-3.22 (m, 2H), 3.44-3.69 (m, 5H), 4.50 4.61 (m, 2H), 7.25-7.48 (m, 4H), 7.59 (t, 1 H), 7.82 (d, 2H), 8.03 (d, 1 H), 8.31 (s, 1 H), 11.4 10 (brs, 1H). Microanalysis for C 18 H22FN 3 , 2 x HCI: Calculated: C: 58.07%; H: 6.50%; N: 11.29%; Found: C: 58.16%; H: 6.61%, N: 10.94%. 15 Example 9 (General procedure A) 1-(4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridin-3-yl]phenyl}ethanone, dihydrochloride CH 3 -C N N N, 2 HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-acetylphenyl)pyridine and 1 -cyclopentylpiperazine. 20 'H NMR (300 MHz, DMSO-d) 6 1.47-1.63 (m, 2H), 1.68-1.95 (m, 4H), 1.96-2.09 (m, 2H), 2.61 (s, 3H), 3.03-3.19 (m, 2H), 3.44-3.65 (m, 5H), 4.47-4.57 (m, 2H), 7.23 (d, 1 H), 7.85 (d, 2H), 8.03 (d, 2H), 8.19 (d, 1 H), 8.56 (s, 1 H), 11.5 (brs, 1 H). Microanalysis for C 22

H

27

N

3 0, 2 x HCI, 2 x H 2 0: Calculated: C: 57.64%; H: 7.26%; N: 9.17%; 25 Found: C: 58.06%; H: 7.23%, N: 9.10%.

71 Example 10 (General procedure A) 4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzonitrile, dihydrochloride N N N H3C N, 2 HCI 5

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-cyanophenyl)pyridine and 1 -isopropylpiperazine. 'H NMR (300 MHz, DMSO-d) 6 1.32 (d, 6H), 3.04-3.19 (m, 2H), 3.46-3.66 (m, 5H), 4.52 4.62 (m, 2H), 5.05 (brs, 6 H), 7.24 (d, 1H), 7.91 (s, 4H), 8.19 (dd, 1H), 8.56 (d, 1H), 11.4 (brs, 10 1H). Microanalysis for C 19

H

22

N

4 , 2 x HCI, 2.5 x H 2 0: Calculated: C: 53.78%; H: 6.89%; N: 13.20%; Found: C: 53.51%; H: 6.82%, N: 12.59%. 15 Example 11 (General procedure A) (4-(2-Pyrrolidin-1 -ylethyl)piperidin-1 -yl)-5-(4-trifluoromethylphenyl)pyridine, hydrochloride F F F N N HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-trifluoromethylphenyl)pyridine and 4-(2-pyrrolidinoethyl)piperidine. 20 Mp = 166-1680C. 1 H NMR (300 MHz, CDCI 3 ) 6 1.35-2.31 (m, 11H), 2.76-2.97 (m, 2H), 3.10-3.26 (m, 2H), 3.38 (t, 2H), 3.69-3.87 (m, 2H), 4.48-4.67 (m, 2H), 7.15 (d, 1H), 7.64 (d, 2H), 7.73 (d, 2H), 8.09 (d, 1H), 8.41 (s, 1H), 12.2 (brs, 1H), 15.5 (brs, 1H). 25 Example 12 (General procedure A) 72 1 -(3-Piperidin-1 -ylpropyl)-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine, dihydrochlo ride F F N N N -,Nr 2 HCI The title compound was prepared by a similar procedure to that described in Example 1, 5 starting from 2-chloro-5-(4-trifluoromethylphenyl)pyridine and 1-(3-piperidinopropyl) piperazine. HPLC (Method A): tr = 12.05 min (100 %). Example 13 (General procedure A) 10 1'-[6-(4-Methanesulfonylphenyl)pyridazin-3-yl]-[1,4']bipiperidinyl 9 -CH S 00 NN NN The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-methanesulfonylphenyl)pyridazine and 4-(piperid-1 -yl)piperidine. 1 H NMR (400 MHz, CDCl 3 ) 6 1.24 (t, J=6.82 Hz, 1H), 1.38-1.51 (m, 2H), 1.52-1.69 (m, 5H, 15 1.98 (d, J=12.63 Hz, 2H), 2.47-2.63 (m, 4H), 2.95-3.07 (m, 2H), 3.09 (s, 3H), 3.72 (q, J=7.07 Hz, 1H), 4.56 (d, J=13.14 Hz, 2H), 7.01 (d, J=9.60 Hz, 1H), 7.67 (d, J-=9.60 Hz, 1H), 8.02 (d, J=8.59 Hz, 2H), 8.20 (d, J=8.59 Hz, 2H). Microanalysis for C21 H 28

N

4 0 2 S, 0.25 x H 2 0: Calculated: C: 62.27%; H: 7.09%; N: 13.83%; 20 Found: C: 61 .85%; H: 6.84%; N: 13.49%. Example 14 (General procedure A) Dimethyl-(3-{4-[6-(4-trifluoromethylphenyl)pyridazin-3-yl]piperazin-1 -yl}propyl)amine, dihy drochloride 73 F F F 9H 3 N NN 2C'N, N, 2 HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-trifluoromethylphenyl)pyridazine and (3-dimethylaminoprop-1 yl)piperazine. 5 1 H NMR (400 MHz, D 2 0) 6 2.06-2.35 (m, 2H), 2.85 (s, 5H), 3.13-3.23 (m, 2H), 3.23-3.32 (m, 2H), 3.49 (s, 3H), 4.70 (s, 7H), 7.68 (d, J=1 0.11 Hz, 1 H), 7.78 (d, J=8.59 Hz, 2H), 7.90 (d, J=8.59 Hz, 2H), 8.08 (d, J=9.60 Hz, 1 H). Microanalysis for C2H 26

N

5

F

3 , 2 x HCI, 2.75 x H 2 0: Calculated: C: 46.56%; H: 6.54%; N: 13.57%; 10 Found: C: 46.53%; H: 6.35%; N: 13.32%. Example 15 (General procedure A) 3-[4-(1 -Methylpiperidin-3-ylmethyl)piperazin-1 -yl]-6-(4-trifluoromethylphenyl)pyridazine F F

.

N F HN NN 15 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-trifluoromethylphenyl)pyridazine and (1 -methylpiperidin-3-yl methyl)piperazine. 1 H NMR (400 MHz, DMSO-d) 6 1.12-1.31 (m, 1 H), 1.71-2.01 (m, 2H), 2.54-2.97 (m, 4H), 3.04-3.33 (m, 3H), 3.40 (d, J=10.61 Hz, 1H), 3.53-3.86 (m, 9H), 4.62 (brs, 1H), 7.78 (d, 20 J=1 0.11 Hz, 1H), 7.91 (d, J=8.08 Hz, 2H), 8.23-8.37 (m, 3H). Example 16 (General procedure A) 3-[4-(1-Methylpiperidin-4-ylmethyl)piperazin-1-yl]-6-(4-trifluoro methylphenyl)pyridazine, dihy drochloride 74 F F F

H

3 C N H C 'N ,_ N , NJ 2 H C I The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-trifluoromethylphenyl)pyridazine and (1 -methylpiperidin-4-yl methyl)piperazine. 5 'H NMR (400 MHz, DMSO-d) 6 1.48-1.64 (m, 2H), 2.05-2.20 (m, 3H), 2.68-2.79 (m, 3H), 2.94 (t, J=1 1.87 Hz, 2H) 3.06-3.25 (m, 4H) 3.69 (d, J=12.13 Hz, 4H) 4.58 (d, J=1 3.64 Hz, 2H) 7.65 (d, J=9.60 Hz, 1 H) 7.89 (d, J=8.59 Hz, 2H) 8.23 (d, J=9.60 Hz, 1 H) 8.29 (d, J=8.08 Hz, 2H). Microanalysis for C22H 2 8

N

5

F

3 , 2 x HCI, 2.75 x H 2 0: 10 Calculated: C: 48.85%; H: 6.43%; N: 12.95% Found: C: 49.00%; H: 6.23%; N 12.80%. Example 17 (General procedure A) 4-{6-[4-(1-Methylpiperidin-4-ylmethyl)piperazin-1-yl]pyridazin-3-yl}benzonitrile, hydrochloride CN H C'N N N N N 15N,,) HOI 15 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-cyanophenyl)pyridazine and (1 -methylpiperidin-4-ylmethyl) piperazine. 1 H NMR (400 MHz, D 2 0) 6 1.45-1.62 (m, 2H), 2.06 (d, J=14.15 Hz, 2H), 2.17-2.32 (m, 1H), 20 2.74-2.84 (m, 3H), 2.98 (t, 1H), 3.19 (d, J=7.07 Hz, 2H), 3.25-3.63 (m, 7H), 3.80-4.30 (broad m, 3H), 7.66 (d, 1H), 7.78 (d, 2H), 7.87 (d, 2H), 8.06 (d, J=10.11 Hz, 1H). Example 18 (General procedure A) 4-{6-[4-(1 -Methylpiperidin-3-ylmethyl)piperazin-1 -yl]pyridazin-3-yl}benzonitrile, trihydrochlo 25 ride 75 CN

-

N N 3 HCI

H

3 C The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-cyanophenyl)pyridazine and (1 -methylpiperidin-3-ylmethyl) piperazine. 5 'H NMR (400 MHz, D 2 0) 6 1.30 (m, 1 H), 1.74 (m, 1 H), 1.99 (m, 2H), 2.41 (dd, J=6.82, 3.28 Hz, 1 H), 2.84 (m, 5H), 3.21 (d, J=6.57 Hz, 2H), 3.49 (m, 6H), 4.03 (m, 4H), 7.81 (m, 3H) 7.91 (d, 2H), 8.17 (d, J=-9.60 Hz, 1H). Microanalysis for C22H 2 8

N

6 , 3 x HCI, 3.75 x H 2 0: Calculated: C: 47.75%; H: 7.01%; N: 15.18% 10 Found: C: 47.99%; H: 6.96%; N: 15.01%. Example 19 (General procedure A) (S)-3-(4-Butylsulfanylphenyl)-6-(2-pyrrolidin-1-ylmethylpyrrolidin-1-yl)pyridazine, hydrochlo ride S

CH

3 NN'N. IO 15 I-N HCI 15 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-butylsulfanylphenyl)pyridazine and (2S)-(pyrrolidin-1 -ylmethyl) pyrrolidine. 'H NMR (400 MHz, D 2 0) 6 0.74 (t, J=7.33 Hz, 3H), 1.00 (t, J=7.07 Hz, 2H), 1.27 (m, 2H), 20 1.49 (m, 2H), 2.04 (m, 5H) 2.88 (t, J=7.58 Hz, 2H), 3.24 (m, 6H), 3.62 (m, 3H), 4.46 (m, J=6.06 Hz, 1H), 7.28 (d, J=8.59 Hz, 2H), 7.47 (d, J=1 0.11 Hz, 1H), 7.55 (d, J=8.59 Hz, 2H), 8.00 (d, J=9.60 Hz, 1H). Example 20 (General procedure A) 25 (S)-3-(4-Ethanesulfonylphenyl)-6-(2-pyrrolidin-1 -ylmethylpyrrolidin-1 -yl)pyridazine, hydrochlo ride 76 H3 N CZ N HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-ethanesulfonylphenyl)pyridazine and (2S)-(pyrrolidin-1-ylmethyl) pyrrolidine. 5 'H NMR (400 MHz, D 2 0) 6 1.12 (t, J=7.33 Hz, 3H), 2.10 (m, 8H), 3.16 (m, 2H), 3.27 (q, J=7.58 Hz, 2H), 3.36 (m, 2H), 3.47 (m, 1 H), 3.67 (m, 2H), 3.82 (s, 1 H), 4.59 (m, 1 H), 7.42 (d, J=9.60 Hz, 1 H), 7.87 (m, 2H), 7.94 (m, 2H), 8.02 (d, J=9.60 Hz, 1 H). Example 21 (General procedure A) 10 (S)-3-(4-Ethanesulfinylphenyl)-6-(2-pyrrolidin-1-ylmethylpyrrolidin-1-yl)pyridazine, hydrochlo ride HC N AHCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-ethanesulfinylphenyl)pyridazine and (2S)-(pyrrolidin-1-ylmethyl) 15 pyrrolidine. 'H NMR (400 MHz, D 2 0) 6 1.03 (t, J=7.33 Hz, 3H), 2.04 (m, 8H), 2.89 (m, 1H), 3.02 (m, 3H), 3.31 (m, 3H), 3.57 (m, 2H), 3.79 (m, 1 H), 4.50 (q, J=5.73 Hz, 1 H), 7.33 (d, J=9.60 Hz, 1 H), 7.65 (d, J=7.07 Hz, 2H), 7.89 (d, J=8.08 Hz, 2H), 7.97 (d, J=9.60 Hz, 1 H). 20 Example 22 (General procedure A) (S)-3-(4-Ethylsulfanylphenyl)-6-(2-pyrrolidin-1-ylmethylpyrrolidin-1-yl)pyridazine, hydrochlo ride N NS CH

HCI

77 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-ethylsulfanylphenyl)pyridazine and (2S)-(pyrrolidin-1-ylmethyl) pyrrolidine. 'H NMR (400 MHz, CD 3 0D) 6 1.37 (t, J=7.33 Hz, 3H), 2.20 (m, 7H), 3.10 (q, J=7.07 Hz, 2H), 5 3.47 (m, 6H), 3.84 (brs, 2H), 3.97 (brs, 1 H), 4.73 (brs, 1 H), 7.52 (d, J=7.58 Hz, 2H), 7.91 (m, J=7.58 Hz, 3H), 8.41 (m, 1 H). Example 23 (General procedure A) 5-(4-Chlorophenyl)-2-(4-isopropylpiperazin-1 -yl)pyrimidine, dihydrochloride N CI HC N 2 HCI 10 CH 3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-chlorophenyl)pyrimidine and 1-isopropylpiperazine. 'H NMR (300 MHz, DMSO-d) 6 1.33 (d, J=6.41 Hz, 6H), 3.08 (m, 2H), 3.53 (m, 5H), 4.82 (d, J=13.94 Hz, 2H), 7.54 (d, J=8.67 Hz, 2H), 7.74 (d, J=8.67 Hz, 2H), 8.82 (s, 2H). 15 Microanalysis for C 17

H

2

,N

4 CI, 2 x HCI: Calculated: C: 52.39%; H: 5.95%; N: 14.37%; Found: C: 52.90%; H: 6.04%; N: 14.18%. Example 24 (General procedure A) 20 2-(4-isopropylpiperazin-1 -yl)-5-(4-trifluoromethylphenyl)pyrimidine, hydrochloride

CF

3 <N N HCN HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-trifluoromethylphenyl)pyrimidine and 1 -isopropylpiperazine. 1 H NMR (400 MHz, DMSO-d) 6 1.31 (d, J=6.57 Hz, 6H), 3.05 (m, 2H), 3.51 (m, 5H), 4.82 (d, 25 J=14.65 Hz, 2H), 7.81 (d, J=8.08 Hz, 2H), 7.93 (d, J=8.08 Hz, 2H), 8.89 (m, 2H), 11.23 (brs, 1 H).

78 Microanalysis for C 1 8

H

21

F

3

N

4 , 1.75 x HCI: Calculated: C: 52.20%; H: 5.54%; N: 13.53%; Found: C: 52.41%; H: 5.54%; N: 13.26%. 5 Example 25 (General procedure A) 4-[2-(4-Isopropylpiperazin-1-yl)pyrimidin-5-yl]benzonitrile, dihydrochloride CN ( N N H3 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-cyanophenyl)pyrimidine and 1 -isopropylpiperazine. 10 1 H NMR (400 MHz, DMSO-d) 6 1.31 (d, J=6.57 Hz, 6H), 3.07 (m, 2H), 3.52 (m, 5H), 4.81 (d, J=1 4.15 Hz, 2H), 7.93 (s, 4H), 8.91 (s, 2H), 11.34 (brs, 1H). Microanalysis for C 1 8

H

2 11N 5 , 2 x HCI, 0.75 x H 2 0: Calculated: C: 54.90%; H: 6.27%; N: 17.78%; Found: C: 55.23%; H: 6.45%; N: 17.54%. 15 Example 26 (General procedure A) 5-(4-Fluorophenyl)-2-(4-isopropylpiperazin-1-yl)pyrimidine, dimethanesulfonate F N9 N F H3C N N 2 H 3 C-S-OH

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, 20 starting from 2-chloro-5-(4-fluorophenyl)pyrimidine and 1-isopropylpiperazine. 1 H NMR (400 MHz, DMSO-d6 + D 2 0) 6 1.29 (d, J=7.07 Hz, 6H), 2.39 (s, 6H), 3.10 (m, 2H), 3.32 (t, J=12.38 Hz, 2H), 3.55 (m, 3H), 7.31 (t, J=8.84 Hz, 2H), 7.73 (dd, J=8.84, 5.31 Hz, 2H), 8.79 (s, 2H), 9.52 (brs, 1 H). Microanalysis for C 1 7

H

21

N

4 F, 2 x CH 3

SO

3 H: 25 Calculated: C: 46.33%; H: 5.93%; N: 11.37%; Found: C: 46.05%; H: 6.07%; N: 11.06%.

79 Example 27 (General procedure A) 2-(4-Isopropylpiperazin-1 -yl)-5-(4-trifluoromethoxyphenyl)pyrimidine, dimethanesulfonate 0 F OF N N O H3C N2 H 3 C- -OH

CH

3 0 5 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-trifluoromethoxyphenyl)pyrimidine and 1 -isopropylpiperazine. 1 H NMR (400 MHz, DMSO-d 6 + D 2 0) 6 1.31 (d, J=6.57 Hz, 6H), 2.41 (s, 6H), 3.12 (m, 2H), 3.34 (t, J=12.13 Hz, 2H), 3.56 (m, 3H), 4.86 (d, J=14.15 Hz, 2H), 7.48 (d, J=8.08 Hz, 2H), 7.83 (d, J=8.59 Hz, 2H), 8.84 (s, 2H). 10 Microanalysis for C1 8

H

21

F

3

N

4 0, 2 x CH 3

SO

3 H, 0.75 x H 2 0: Calculated: C: 41.99%; H: 5.37%; N: 9.79%; Found: C: 42.17%; H: 5.34%; N: 9.74%. Example 28 (General procedure A) 15 2-(4-Isopropylpiperazin-1 -yl)-5-(4-methoxyphenyl)pyrimidine, dimethanesulfonate N N H3C N,*' N,,) CH 2 H 3 C- -OH 0 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-methoxyphenyl)pyrimidine and 1 -isopropylpiperazine. 1 H NMR (400 MHz, DMSO-ds) 6 1.29 (d, J=6.57 Hz, 6H), 2.40 (s, 6H), 3.07 (m, 2H), 3.31 (t, 20 J=12.13 Hz, 2H), 3.54 (m, J=11.37, 11.37 Hz, 3H), 3.79 (s, 3H), 4.81 (d, J=14.15 Hz, 2H), 7.03 (d, J=8.59 Hz, 2H), 7.61 (d, J=9.1 0 Hz, 2H), 8.75 (s, 2H), 9.52 (brs, 1 H). Example 29 (General procedure A) (S)-3-(2-Pyrrolidin-1 -ylmethylpyrrolidin-1 -yl)-6-(4-trfluoromethylphenyl)pyridazine, dihydro 25 chloride 80 F F | F CN N N'N 2 HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-trifluoromethylphenyl)pyridazine and (2S)-(pyrrolidin-1-ylmethyl) pyrrolidine. 5 1 H NMR (400 MHz, CD 3 0D) 6 2.20 (m, 8H), 3.31 (m, 2H), 3.48 (m, 2H), 3.62 (m, 1 H), 3.86 (m, 3H), 4.80 (m, 1 H), 7.91 (m, J=8.59 Hz, 3H), 8.20 (d, J=8.08 Hz, 2H), 8.45 (d, J=9.60 Hz, 1 H). Microanalysis for C20H 23

F

3

N

4 , 2 x HCI, 3 x H 2 0: Calculated: C: 47.72%; H: 6.21%; N: 11.13%; 10 Found: C: 47.95%; H: 6.35%; N: 10.92%. Example 30 (General procedure A) N-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}acetamide H N CH3 O N N N H3C N

CH

3 15 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-acetylaminophenyl)pyridazine and 1 -isopropylpiperazine. 'H NMR (400 MHz, CDC13) 6 1.10 (d, 6H), 2.20 (m, 3H), 2.68 (m, 4H), 2.75 (m, 1H), 3.73 (m, 4H), 6.97 (d, J=9.60 Hz, 1 H), 7.38 (s, 1 H), 7.61 (dd, J=9.10, 5.05 Hz, 3H), 7.96 (d, J=8.59 Hz, 2H). 20 Example 31 (General procedure A) [1 -(1 -Ethylpropyl)piperidin-4-yl]-[6-(3-fluoro-4-methoxyphenyl)pyridazin-3-yl]amine H O_ H 3 01CH H N NFCH N N

H

81 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-methoxy-3-fluorophenyl)pyridazine and 4-amino-1 -(1 -ethylpropyl) piperidine. 1 H NMR (400 MHz, CD 3 0D) 6 0.93 (m, 6H), 1.47 (m, 7H), 2.07 (d, J=1 1.62 Hz, 2H), 2.20 (m, 5 1H), 2.45 (m, 2H), 2.83 (d, J=12.13 Hz, 2H), 3.85 (m, 1H), 3.91 (s, 3H), 6.90 (d, J=9.10 Hz, 1 H), 7.17 (t, J=8.59 Hz, 1 H), 7.68 (m, 3H). Example 32 (General procedure A) [1 -(1 -Ethylpropyl)piperidin-4-yl]-[6-(4-methanesulfonylphenyl)pyridazin-3-yl]amine

OH

3 Q, -CH 3

H

3 C N NCH0 N N' 10 H The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-methanesulfonylphenyl)pyridazine and 4-amino-1 -(1 -ethylpropyl) piperidine. 1 H NMR (400 MHz, CD 3 0D) 6 0.93 (m, 6H), 1.49 (m, 7H), 2.08 (d, J=11.62 Hz, 1H), 2.23 (m, 15 1 H), 2.48 (m, 2H), 2.85 (d, J=12.13 Hz, 2H), 3.16 (s, 3H), 3.90 (m, 1 H), 6.96 (d, J=9.60 Hz, 1 H), 7.83 (d, J=9.60 Hz, 1 H), 8.03 (d, J=8.59 Hz, 2H), 8.19 (d, J=8.59 Hz, 2H). Microanalysis for C21H30N 4 02S: Calculated: C: 62.66%; H: 7.51%; N: 13.92%; Found: C: 62.38%; H: 7.58%; N: 13.31%. 20 Example 33 (General procedure A) 1 -Isopropyl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine F F |F N N HC N

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, 25 starting from 2-chloro-5-(4-trifluoromethylphenyl)pyridine and 1 -isopropylpiperazine.

82 'H NMR (400 MHz, DMSO-d) 6 1.00 (d, J=6.57 Hz, 6H), 2.52 (m, 4H), 2.69 (m, 1 H), 3.55 (m, 4H), 6.93 (d, J=9.09 Hz, 1 H), 7.75 (m, 2H), 7.85 (m, 2H), 7.93 (dd, J=8.84, 2.78 Hz, 1 H), 8.53 (d, J=2.53 Hz, 1H). Microanalysis for CjqH 22

F

3

N

3 : 5 Calculated: C: 65.31%; H: 3.35%; N: 12.03%; Found: C: 65.08%; H: 6.23%; N: 12.05%. Example 34 (General procedure A) 3-(2,3-Dihydrobenzo[1,4]dioxin-6-yl)-6-(4-isopropylpiperazin-1-yl)pyridazine, dihydrochloride 1 0~ N N N

H

3 CN 2 HCI 10 CH 3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(4-(2,3-dihydrobenzo[1,4]dioxin-6-yl)-phenyl)pyridazine and 1 isopropylpiperazine. 'H NMR (400 MHz, DMSO-d) 6 1.32 (d, J=6.57 Hz, 6H), 3.18 (m, 2H), 3.53 (m, J=12.13 Hz, 15 3H), 3.75 (t, J=12.38 Hz, 2H), 4.32 (s, 4H), 4.60 (d, J=13.64 Hz, 2H), 7.05 (d, J=8.08 Hz, 1H), 7.59 (m, 2H), 7.95 (d, J=10.11 Hz, 1H), 8.37 (d, J=9.60 Hz, 1H), 11.68 (brs, 1H). Microanalysis for C 19

H

24

N

4 0 2 , 2 x HCI: Calculated: C: 55.21%; H: 6.34%; N: 13.55%; Found: C: 55.25%; H: 6.40%; N: 13.55%. 20 Example 35 (General procedure A) 4-{6-[1 -(1 -Ethylpropyl)piperidin-4-ylamino]pyridazin-3-yl}benzonitrile

OH

3 CN

H

3 C_'N HC, NNC N N' H The title compound was prepared by a similar procedure to that described in Example 1, 25 starting from 3-chloro-6-(4-cyanophenyl)pyridazine and 4-amino-1 -(1 -ethylpropyl)piperidine. 'H NMR (400 MHz, DMSO-d) 6 0.87 (t, J=7.33 Hz, 6H), 1.35 (m, 7H), 1.98 (m, 2H), 2.17 (m, 1 H), 2.36 (t, J=1 0.36 Hz, 2H), 2.71 (m, J=12.13 Hz, 2H), 6.89 (d, J=9.60 Hz, 1 H), 7.09 (d, J=7.58 Hz, 1H), 7.91 (m, 3H), 8.17 (d, J=8.08 Hz, 2H).

83 Example 36 (General procedure A) Dimethyl-(2-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yl}ethyl)amine F F F N N H3C NN)

CH

3 5 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-chloro-5-(4-trifluoromethylphenyl)pyridine and (2-dimethylaminoethyl) piperazine. 1 H NMR (400 MHz, CDCI 3 ) 6 2.29 (s, 6H), 2.53 (m, 4H), 2.61 (m, 4H), 3.64 (m, 4H), 6.72 (d, J=9.1 0 Hz, 1 H), 7.64 (m, 4H), 7.72 (dd, J=9.1 0, 2.53 Hz, 1 H), 8.45 (d, J=2.53 Hz, 1 H). 10 Example 37 (General procedure H) 1 -(Tetrahydropyran-4-yl)-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine F F F N N O NJ The title compound was prepared by a similar procedure to that described in Example 57, 15 starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and 4-chloro-tetrahydro pyran. 'H NMR (400 MHz, CDCl 3 ) 6 1.63 (m, 2H), 1.82 (m, 2H), 2.50 (m, 1H), 2.70 (m, 4H), 3.40 (t, J=1 0.86 Hz, 2H), 3.64 (m, 4H), 4.05 (dd, J=11.12, 4.04 Hz, 2H), 6.73 (d, J=9.10 Hz, 1H), 7.64 (m, 4H), 7.73 (dd, J=9.10, 2.53 Hz, 1H), 8.46 (d, J=2.53 Hz, 1H). 20 Example 38 (General procedure A) 1-[6-(4-Trifluoromethylphenyl)pyridazin-3-yl]piperidin-3-ylamine, hydrochloride 84 F F F H2N NN HCI 3-Chloro-6-(4-trifluoromethylphenyl)pyridazine (0.2 g, 0.77 mmol), 3-aminopiperidine dihy drochloride (0.27 g, 1.54 mmol) and potassium carbonate (0.53 g, 3.87 mmol) were mixed in acetone (4 mL) in a 20 mL microwave vessel. The reaction mixture was heated in a micro 5 wave oven for 2 h at 1200C. The reaction mixture was filtered and the precipitate was washed with MeOH. The combined organic phases were evaporated. The crude oil was puri fied on a silicagel column (0.04-0.063 mesh) using dichloromethane/MeOH (9:1) as eluent. This afforded 110 mg of a oil that was dissolved in MeOH and acidified with concentrated HCI (5 mL). The mixture was evaporated and the residue was dissolved in MeOH (1 mL) and 10 ether (100 mL) was added with stirring. The mixture was evaporated to give 76 mg (25 %) of the title compound as a yellow solid. Mp = 97-1350C. 'H NMR (400 MHz, CD 3 0D) 6 1.74 (m, 2H) 1.93 (m, 1 H) 2.16 (m, 1 H) 3.35 (m, 3H) 3.44 (m, 1 H) 4.14 (d,d, 1 H) 4.45 (d,d, 1 H) 4.97 (s, 3H) 7.39 (d, 1 H) 7.75 (d, 2H) 7.78 (s, 2H) 7.95 (s, 15 1H) 8.13 (d, 2H). HPLC-MS (Method G): M+1 = 323; tr= 1.117 min. Example 39 (General procedure B) 20 N-{4-[6-(4-Isopropylpiperazin-1-yl)pyridin-3-yl]benzyl}acetamide, dihydrochloride 0 NN

CH

3 N N' HC N,) 2 HC

CH

3 Step 1: 4-(6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine 85 N NH 2 H3C N

CH

3 A mixture of a 1 M solution of LiAIH 4 in THF (1.1 mL, 1.1 mmol) and dry THF (10 mL) was placed under an atmosphere of nitrogen. A solution of 4-(6-(4-isopropylpiperazin-1-yl)pyridin 3-yl)benzonitrile (306 mg, 1.0 mmol, prepared as described in Example 10) in dry THF (5 5 mL) was added dropwise. The reaction mixture was then stirred at rt for 3 h and quenced with 1 N NaOH. The mixture was filtered and the volatiles were removed. The residue was re-evaporated with THF to give 310 mg (100 %) of 4-(6-(4-isopropylpiperazin-1 -yl)pyridin-3 yl]benzylamine. 'H NMR (300 MHz, CDCl 3 ) 6 1.10 (d, 6H), 2.63-2.68 (m, 4H), 2.75 (hept, 1 H), 3.59-3.64 (m, 10 4H), 3.90 (s, 2H), 6.70 (d, 1 H), 7.37 (d, 2H), 7.48 (d, 2H), 7.71 (dd, 1 H), 8.44 (d, 1 H). Step 2: A mixture of the above benzylamine (310 mg, 1.0 mmol), glacial acetic acid (15 mL) and ace tic anhydride (0.2 mL, 2.1 mmol) was stirred for 2 days at rt. The reaction mixture was evapo 15 rated to dryness, and the residue was stirred with a mixture of ethyl acetate (200 mL) and 2 M sodium carbonate (50 mL). The phases were separated and the organic phase was dried (MgSO 4 ). The solvent was evaporated to give a solid residue which was stirred with a small portion of acetonitril. The solid was isolated by filtration and dried to give 250 mg (71 %) of N {4-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl}acetamide. 20 Mp = 188-190 0 C. 'H NMR (300 MHz, CDCI 3 ) 6 1.10 (d, 6H), 2.03 (s, 3H), 2.64-2.68 (m, 4H), 2.75 (hept, 1H), 3.58-3.66 (m, 4H), 4.46 (d, 2H), 5.83 (brs, 1 H), 6.72 (d, 1 H), 7.33 (d, 2H), 7.47 (d, 2H), 7.68 (dd, 1 H), 8.43 (d, 1 H). The free base (250 mg) was dissolved into a 0.5 N hydrochloric acid solution. When dis 25 solved, the mixture was evaporated and then re-evaporated with acetonitril. The solid residue was stirred with ethyl acetate, filtered and dried to give 270 mg (69 %) of the title compound. 'H NMR (300 MHz, DMSO-d) 6 1.32 (d, 6H), 1.89 (s, 3H), 3.05-3.21 (m, 2H), 3.45-3.66 (m, 5H), 4.28 (d, 2H), 4.48-4.59 (m, 2H), 7.27 (d, 1H), 7.34 (d, 2H), 7.64 (d, 2H), 8.16 (d, 1H), 8.40 (s, 1 H), 8.45 (t, 1 H), 11.3 (brs, 1 H). 30 Microanalysis for C21H 28

N

4 0, 2 x HCl, 1.5 x H 2 0: Calculated: C: 55.75%; H: 7.35%; N: 12.38%; 86 Found: C: 55.53%; H: 7.38%, N: 12.17%. Example 40 (General procedure C) 1-Isopropyl-4-{5-[4-(5-methyl[1,2,4]oxadiazol-3-yl)phenyl]pyridin-2-yl}piperazine, hydrochlo 5 ride N-O S/ -CH3 N.N (N N

H

3 C N HCI

CH

3 Step 1: N-Hydroxy-4-(6-(4-isopropylpiperazin-1 -yl)pyridine-3-yl)benzamidine N'OH

NH

2 NN HGC N.>

CH

3 10 A mixture of 4-(6-(4-isopropylpiperazin-1-yl)pyridin-3-yl)benzonitrile (330 mg, 1.1 mmol, pre pared as described in Example 10), ethanol (15 mL), hydroxylamine hydrochloride (225 mg, 3.2 mmol), potassium carbonate (240 mg, 1.7 mmol) and water (1.5 mL) was stirred at ref lux temperature overnight. The reaction mixture was allowed to cool to rt, and the solid was iso lated by filtration and dried. The solid was then stirred with water (10 mL) to remove inor 15 ganic residues. The mixture was filtered and the solid was washed with water and a small portion of ethanol. Drying in vacuo afforded 260 mg (71 %) of N-hydroxy-4-(6-(4-isopropyl piperazin-1 -yl)pyridine-3-yl)benzamidine. 1 H NMR (300 MHz, DMSO-d) 6 1.00 (d, 6H), 2.50-2.55 (m, 4H), 2.67 (hept, 1 H), 3.49-3.54 (m, 4H), 5.81 (brs, 2H), 6.88 (d, 1 H), 7.62 (d, 2H), 7.73 (d, 2H), 7.86 (dd, 1 H), 8.48 (d, 1 H), 20 9.65 (s, 1H). Step 2: A mixture of the above N-hydroxybenzamidine (260 mg, 0.76 mmol), glacial acetic acid (10 mL) and acetic anhydride (0.56 mL) was stirred for 2 days at rt. The reaction mixture was 87 then heated at reflux temperature for 45 min. The mixture was evaporated to give an oily residue which was stirred with a mixture of ethyl acetate (100 mL) and 2 M sodium carbonate (25 mL). The phases were separated and the organic phase was dried (MgSO4). The solvent was evaporated to give a solid residue which was boiled with acetonitril. The mixture was 5 allowed to cool, and the solid was isolated by filtration and dried to give 110 mg (28 %) of 1 isopropyl-4-{5-[4-(5-methyl[1,2,4]oxadiazol-3-yl)phenyl]pyridin-2-yl}piperazine. 1 H NMR (300 MHz, CDCl 3 ) 6 1.11 (d, 6H), 2.64-2.69 (m, 4H), 2.67 (s, 3H), 2.75 (hept, 1H), 3.63-3.67 (m, 4H), 6.73 (d, 1 H), 7.63 (d, 2H), 7.76 (dd, 1 H), 8.10 (d, 2H), 8.50 (d, 1 H). The free base (110 mg) was dissolved into a 0.5 N hydrochloric acid solution. When dis 10 solved, the mixture was evaporated and then re-evaporated with acetonitril. The solid residue was re-crystallised from absolute ethanol to give 120 mg (28 %) of the title compound. 1 H NMR (300 MHz, DMSO-d 6 ) 6 1.32 (d, 6H), 2.69 (s, 3H), 3.06-3.23 (m, 2H), 3.40-3.66 (m, 5H), 4.51-4.63 (m, 2H), 7.29 (d, 1 H), 7.90 (d, 2H), 8.07 (d, 2H), 8.23 (d, 1 H), 8.54 (s, 1 H), 11.3 (brs, 1H). 15 Example 41 (General procedure D) 1-(5-(5-(4-Chloromethylphenyl)[1,2,4]oxadiazol-3-yl)pyridine-2-yl)-4-isopropylpiperazine N-0 NIN

H

3 C N.,)

CH

3 Step 1: 20 6-(4-Isopropylpiperazin-1 -yl)nicotinonitrile, hydrochloride N N H3C N,) HCI

CH

3 A mixture of 2-chloropyridine-5-carbonitrile (5.0 g, 36.1 mmol), DMSO (10 mL) and 1-iso propylpiperazine (10.7 mL, 75.8 mmol) was stirred under an atmosphere of nitrogen and heated on a 1 00 0 C oil-bath for 3 h. The reaction mixture was allowed to cool, and then 25 poured into cold water (500 mL). The solid was isolated by filtration, washed with water and dried to give 6.8 g (82 %) of 6-(4-isopropylpiperazin-1 -yl)nicotinonitrile.

88 'H NMR (400 MHz, CDC13) 6 1.08 (d, 6H), 2.59-2.64 (m, 4H), 2.75 (hept,1 H), 3.67-3.72 (m, 4H), 6.59 (d, 1 H), 7.60 (dd, 1 H), 8.40 (d, 1 H). The free base (500 mg) was dissolved into methanol (50 mL) and 1 N hydrochloric acid solu tion (3 mL) was added. The mixture was evaporated and then re-evaporated with ethanol. 5 The solid residue was stirred with 2-propanol, filtered and dried to give 570 mg (98 %) of 6 (4-isopropylpiperazin-1-yl)nicotinonitrile, hydrochloride. 'H NMR (300 MHz, DMSO-d) 6 1.30 (d, 6H), 2.97-3.12 (m, 2H), 3.41-3.61 (m, 5H), 4.52 4.63 (m, 2H), 7.06 (d, 1 H), 7.97 (dd, 1 H), 8.56 (d, 1 H), 11.5 (brs, 1 H). 10 Step 2: N-Hydroxy-6-(4-isopropylpiperazin-1 -yl)nicotinamidine N'OH

NH

2 N N H3C N")

CH

3 A mixture of 6-(4-isopropylpiperazin-1-y)nicotinonitrile (2.3 g, 10 mmol), ethanol (25 mL), hydroxylamine hydrochloride (2.1 g, 30 mmol), potassium carbonate (2.2 g, 16 mmol) and 15 water (5 mL) was stirred for 30 min at rt and then at reflux temperature for 3 h. The reaction mixture was left at rt for 2 days and then the solid formed was isolated by filtration. The solid was dried, boiled with ethanol (200 mL) and filtered hot to remove inorganic impurities. The filtrate was evaporated to give 2.0 g (76 %) of N-hydroxy-6-(4-isopropylpiperazin-1 -yl)nicotin amidine. 20 'H NMR (400 MHz, DMSO-d) 6 0.98 (d, 6H), 2.67 (hept, 1 H), 3.31-3.51 (m, 8H), 5.74 (brs, 2H), 6.79 (d, 1 H), 7.75 (dd, 1 H), 8.38 (d, 1 H), 9.4 (brs, 1 H). Step 3: The above N-hydroxynicotinamidine (263 mg, 1.0 mmol) was dissolved into N,N-dimethyl 25 acetamide (10 mL) and 4-chloromethylbenzoyl chloride (190 mg, 1.0 mmol) was added. The reaction was stirred for 1 h at rt and then heated at 1050C for 2 h. The mixture was allowed to cool to rt and then filtered. The solid was washed with ethyl acetate and dried. This afforded 280 mg (65 %) of 1-(5-(5-(4-chloromethylphenyl)[1,2,4]oxadiazol-3-yl)pyridine-2-yl)-4-iso propylpiperazine, hydrochloride. The hydrochloride (400 mg) was stirred with water (30 mL) 30 and a potassium carbonate solution was added until alkaline reaction. The mixture was ex tracted with several portions of ethyl acetate (total 100 mL). The combined organic extracts 89 were dried and evaporated to give 300 mg of 1-(5-(5-(4-chloromethylphenyl)[1,2,4]oxadiazol 3-yl)pyridine-2-yl)-4-isopropylpiperazine. 'H NMR (300 MHz, CDCI 3 ) 6 1.09 (d, 6H), 2.59-2.67 (m, 4H), 2.68-2.80 (m, 1 H), 3.66-3.72 (m, 4H), 4.66 (s, 2H), 6.71 (d, 1 H), 7.57 (d, 2H), 8.16 (dd, 1 H), 8.20 (d, 2H), 8.95 (d, 1 H). 5 Example 42 (General procedure D) 4-{3-[6-(4-Isopropylpiperazin-1-yl)pyridin-3-yl][1,2,4]oxadiazol-5-yl}benzonitrile, hydrochloride N-0 N N NN H3C N,) HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 41, 10 starting from N-hydroxy-6-(4-isopropylpiperazin-1-yl)nicotinamidine and 4-cyanobenzoyl chloride. 'H NMR (300 MHz, CDC1 3 ) 6 1.50 (d, 6H), 2.86-3.03 (m, 2H), 3.41-3.55 (m, 3H), 3.97-4.10 (m, 2H), 4.49-4.60 (m, 2H), 6.78 (d, 1 H), 7.87 (d, 2H), 8.25 (dd, 1 H), 8.33 (d, 2H), 8.96 (d, 1H), 12.9 (brs, 1H). 15 Example 43 (General procedure D) 1-[5-(5-Cyclopropyl[1,2,4]oxadiazol-3-yl)pyridin-2-yl]-4-isopropylpiperazine, dimethanesul fonate 1-O N $NN H 3C N,, C 2 X O=p-OH CH 3

CH

3 20 The title compound was prepared by a similar procedure to that described in Example 42, starting from N-hydroxy-6-(4-isopropylpiperazin-1-yl)nicotinamidine and cyclopropylcarbonyl chloride. 'H NMR (300 MHz, CDC 3 ) 6 1.26-1.32 (m, 4H), 1.45 (d, 6H), 2.20-2.28 (m,1H), 2.80 (s, 6H), 3.29-3.45 (m, 2H), 3.54-3.69 (m, 3H), 4.02-4.16 (m, 2H), 4.59-4.70 (m, 2H), 7.31 (d, 1 H), 25 8.42 (dd, 1H), 8.72 (d, 1H), 10.9 (brs, 1H).

90 Example 44 (General procedure E) 1 -Isopropyl-4-{5-[5-(4-piperidin-1 -yImethylphenyl)[1 ,2,4]oxadiazol-3-yl]pyridin-2-yl}piperazine, dihydrochloride N-0 N N HC N 2 HCI

CH

3 5 A mixture of 1-(5-(5-(4-chloromethylphenyl)[1,2,4]oxadiazol-3-yl)pyridine-2-yl)-4-isopropyl piperazine, hydrochloride (280 mg, 0.65 mmol, prepared as described in Example 41, 96 % ethanol (20 mL) and piperidine (0.2 mL, 2.1 mmol) heated at reflux temperature for 4 h. The mixture was evaporated to give a solid residue which was purified by column chromatogra phy on silica gel (75 g, Kiselgel 60, mesh 0.040-0.63) eluting with a mixture of dichloro 10 methane and methanol (7:3). Collecting the proper fractions afforded 310 mg (100 %) of 1 isopropyl-4-{5-[5-(4-piperidin-1 -ylmethylphenyl)[1,2,4]oxadiazol-3-yl]pyridin-2-yl}piperazine. The free base (310 mg) was dissolved into ethanol (20 mL) and a 1 N hydrochloric acid solu tion (1.5 mL) was added. When dissolved, the mixture was evaporated and the solid residue was re-crystallised from ethanol to give 240 mg (67 %) of the title compound. 15 'H NMR (300 MHz, D 2 0) 6 1.42 (d, 6H), 1.61-1.94 (m, 6H), 3.12-3.50 (m, 8H), 3.55-3.69 (m, 1H), 3.82-4.05 (m, 4H), 4.37 (s, 2H), 7.02 (d, 1H), 7.73 (d, 2H), 8.12 (d, 1H), 8.18 (d, 2H), 8.64 (s, 1 H). Example 45 (General Procedure E) 20 1-(4-{3-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl][1,2,4]oxadiazol-5-yl)benzyl)piperidine-4 carboxylic acid amide, dihydrochloride 0

NH

2

N

N HC N 2 HCI

CH

3 91 The title compound was prepared by a similar procedure to that described in Example 44, starting from 1-(5-(5-(4-chloromethylphenyl)[1,2,4]oxadiazol-3-yl)pyridine-2-yl)-4-isopropyl piperazine and isonipecotamide. 1 H NMR (300 MHz, DMSO-d) 6 1.32 (d, 6H), 1.85-1.97 (m, 3H), 2.26-2.40 (m, 1 H), 2.87 5 3.24 (m, 4H), 3.29-3.62 (m, 6H), 4.36-4.48 (m, 2H), 4.53-4.65 (m, 2H), 6.88-7.04 (2xbrs, 1 H), 7.17 (d, 1H), 7.38-7.52 (2xbrs, 1H), 7.90-8.00 (m, 2H), 8.19-8.28 (m, 3H), 8.84 (s, 1H), 11.0 (brs, 1 H), 11.3 (brs, 1 H). Example 46 (General procedure F) 10 1-Prop-1 -yl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine F F F N N HC~ The title compound was prepared by a similar procedure to that described in Example 213, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and propionaldehyde. 'H NMR (400 MHz,CDCl 3 ) 6 0.95 (t, 3H), 1.57 (m, 2H), 2.37 (m, 2H), 2.58 (m, 4H), 3.64 (m, 15 4H), 6.73 (d, J=9.10 Hz, 1 H), 7.64 (m, 4H), 7.72 (dd, J=9.10, 2.53 Hz, 1 H), 8.46 (d, J=2.53 Hz, 1H). Example 47 (General procedure F) 1-Cyclohexyl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine, hydrochloride F F | F rN N 20 The title compound was prepared by a similar procedure to that described in Example 213, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and cyclohexanone. 1 H NMR (400 MHz, DMSO-d6) 6 1.18 (m, 3H), 1.46 (m, 2H), 1.62 (m, 1H), 1.82 (m, 2H), 2.18 (m, 2H), 3.17 (m, 3H), 3.59 (m, 4H), 4.53 (d, 2H), 7.25 (d, J=9.09 Hz, 1H), 7.81 (d, J=8.08 25 Hz, 2H), 7.93 (d, J=8.59 Hz, 2H), 8.18 (m, 1H), 8.54 (d, J=2.53 Hz, 1H), 11.47 (brs, 1H).

92 Example 48 (General Procedure G) 1-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}ethanone

CH

3 r N N'N H3C N

CH

3 5 To a suspension of 4-[6-(4-isopropylpiperazin-1-yl)pyridazin-3-yl]benzonitrile (0.36 g, 1.17 mmol, prepared by a similar procedure to that described in Example 1) in dry THF (5 mL) was added a 1.4 M methylmagnesium bromide solution in toluene/THF. The reaction mixture was stirred at room temperature for 24 h, 1 M hydrochloric acid (7 mL) was added and the solution stirred for 1h. The mixture was made alkaline by addition of excess NaHCO 3 solution 10 and extracted with dichloromethane. The organic phase was dried over magnesium sulphate, the solvent was removed and the solid was re-crystallized from ethanol to give the title com pound, 163 mg (43%). 1 H NMR (400 MHz, DMSO-d) 6 1.01 (d, J=6.57 Hz, 6H), 2.57 (m, 4H), 2.62 (s, 3H), 2.71 (m, 1H), 3.66 (m, 4H), 7.37 (d, J=9.60 Hz, 1H), 8.04 (m, J=9.10, 9.10 Hz, 3H), 8.19 (d, J=8.59 15 Hz, 2H). Microanalysis for C 19

H

24

N

4 0: Calculated: C: 70.34%; H: 7.46%; N: 17.27%; Found: C: 70.07%; H: 7.37%; N: 17.18%. 20 Example 49 (General procedure H) 1-{4-[5-(4-Trifluoromethylphenyl)pyridin-2-yl]piperazin-1-yl}propan-2-one, hydrochloride F F | F H 3 N N OZ N,, HCI The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and chloroacetone. 25 'H NMR (400 MHz, CD 3 0D) 6 2.29 (s, 3H), 3.79 (m, 8H), 4.49 (s, 2H), 7.59 (d, J=9.60 Hz, 1 H), 7.82 (m, 2H), 7.89 (m, 2H), 8.42 (m, 1 H), 8.50 (dd, J=9.35, 2.27 Hz, 1 H).

93 Example 50 (General procedure H) N,N-Dimethyl-2-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -ylIacetamide, hydro chloride F F F N Nl H3C'N& N HCI 5

CH

3 The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and 2-chloro-NN-dimethyl acetamide. 1 H NMR (400 MHz, DMSO-d) 6 2.95 (m, 6H), 3.45 (m, 6H), 4.48 (m, 4H), 7.20 (d, J=9.10 10 Hz, 1 H), 7.80 (d, J=8.08 Hz, 2H), 7.92 (d, J=8.08 Hz, 2H), 8.16 (dd, J=9.09, 2.53 Hz, 1H), 8.57 (d, J=2.02 Hz, 1 H), 10.37 (brs, 1H). Example 51 (General procedure H) 3-{4-[5-(4-Trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yl}propionitrile F F | F N N 15 NN The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and 3-bromopropionitrile. 1 H NMR (400 MHz, DMSO-d) 6 2.54 (m, 4H), 2.62 (t, J=6.57 Hz, 2H), 2.73 (t, J=6.32 Hz, 2H), 3.58 (m, 4H), 6.97 (d, J=8.59 Hz, 1 H), 7.76 (m, 2H), 7.86 (m, 2H), 7.94 (dd, J=8.59, 2.53 20 Hz, 1 H), 8.54 (d, J=2.53 Hz, 1 H). Example 52 (General procedure H) Diethyl-(2-{4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazin-1 -yl}ethyl)amine 94 F F F N N H3C N -,N_, CH3 The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and 2-diethylaminoethyl chloride. 5 'H NMR (400 MHz, CDC1 3 ) 6 1.05 (t, J=7.07 Hz, 6H), 2.61 (m, 12H), 3.63 (m, 4H), 6.73 (d, J=9.10 Hz, 1H), 7.64 (m, 4H), 7.72 (dd, J=9.10, 2.53 Hz, 1H), 8.46 (d, J=2.53 Hz, 1H). Example 53 (General procedure H) 1-(2-Methoxyethyl)-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine FE F N N 10 H 3

C

0 N ,) The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and 2-methoxyethyl bromide. 'H NMR (400 MHz, CDC1 3 ) 6 2.65 (m, 6H), 3.39 (s, 3H), 3.57 (t, J=5.56 Hz, 2H), 3.66 (m, 15 4H), 6.73 (d, J=8.59 Hz, 1 H), 7.64 (m, 4H), 7.72 (dd, J=8.59, 2.53 Hz, 1 H), 8.46 (d, J-=2.53 Hz, 1H). Example 54 (General procedure H) 1-Allyl-4-[5-(4-trifluoromethylphenyl)pyridin-2-yl]piperazine, hydrochloride F F | F KN N 20F1 2 0 NAN )

HCI

95 The title compound was prepared by a similar procedure to that described in Example 55, starting from 4-(5-(4-trifluoromethylphenyl)pyridin-2-yl)piperazine and allyliodide. 'H NMR (400 MHz, DMSO-d) 6 3.08 (d, J=9.10 Hz, 2H), 3.80 (d, J=3.54 Hz, 2H), 4.29 (s, 4H), 4.55 (d, J=14.15 Hz, 2H), 5.54 (m, 2H), 6.06 (m, 1H), 7.24 (d, J=9.09 Hz, 1H), 7.81 (d, 5 J=8.08 Hz, 2H), 7.92 (d, J=8.08 Hz, 2H), 8.19 (dd, J=9.10, 2.53 Hz, 1H), 8.55 (d, J=2.53 Hz, 1 H), 11.77 (brs, 1 H). Example 55 (General Procedure H) 1-Isopropyl-4-[6-(4-trifluoromethylphenyl)pyridazin-3-yl]-[1 ,4]diazepane, dihydrochloride F F F X ,N NJN N NN

H

3 C-( 2 HCI 10 CH 3 4-[6-(4-Trifluoromethylphenyl)pyridazin-3-yl]-[1,4]diazepane, dihydrochloride (0.028 g, 0.071 mmol) was suspended in THF (4 mL) and triethylamine (0.022 g, 0.21 mmol) was added. Sodium hydride (0.0085 g, 0.35 mmol) was added and the reaction mixture was stirred at rt for 20 min. Dry NN-dimethylformamide (1 mL) and 2-chloropropane (0.056 g, 0.71 mmol) 15 was added and the reaction mixture was heated 30 min at 1600C and 30 min at 1800C in a microwave oven. The reaction mixture was purified on a silicagel column (0.04-0.063 mesh) using dichloromethane/MeOH (9:1) as eluent. This afforded a crude oil containing several components that was purified further by preparative HPLC using Method B. This afforded 9 mg of an oil which was dissolved into MeOH. Addition of HCI in diethyl ether afforded 6.5 mg 20 (21 %) of the title compound as an oily dihydrochloride. 'H NMR (400 MHz, CD 3 0D) 6 1.38 (d, J=6.57 Hz, 6H), 2.23-2.46 (m, 2H), 3.32-3.52 (m, 2H), 3.53-3.85 (m, 4H), 3.88-4.15 (m, 2H), 4.26-4.55 (m, 1H), 7.60 (d, J=9.60 Hz, 1H), 7.84 (d, J=8.08 Hz, 2H), 8.05-8.28 (m, 3H) LC-MS (Method G): M+1 = 365; tr = 1.178 min. 25 Example 56 (General Procedure 1) N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetamide, trifluoroace tate 96 H N O rN N IH 3CYN, Tl~A CHC Step 1: 4-lsopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl: N N HCN

CH

3 5 Chloropyrazine (2.3 g, 20 mmol) and triethylamine (3 g, 30 mmol) were mixed in acetone (8 mL) in a 20 mL microwave vessel. 1-Isopropylpiperazine (2.8 g, 22 mmol) was added and the reaction mixture was heated for 3300 seconds at 1200C in a microwave oven. The reaction mixture was evaporated and the residue was purified on a silicagel column with dichloromethane/MeOH (9:1) as eluent. Yield: 1.64 g solid 4-isopropyl-3,4,5,6-tetrahydro-2H 10 [1,2']bipyrazinyl. 'H NMR (400 MHz, CDCI 3 ) 5 1.08 (d, J=6.57 Hz, 6H) 2.61-2.65 (m, 4H) 2.68-2.77 (m, 1H) 3.58-3.62 (m, J=4.55 Hz, 4H) 7.70-7.91 (m, 1 H) 8.03-8.08 (m, 1 H) 8.13 (s, 6H). 13C NMR (400 MHz, CDCI 3 ) 6 18.82, 45.16, 48.66, 54.94, 77.17, 77.48, 77.80, 131.30, 133.10,142.00, 155.30. 15 Step 2: 5-Bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl: JN Br (N N H3C yN,,

CH

3 4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl (1.0 g, 4.8 mmol) was dissolved in di 20 chloromethane (30 mL) and the solution was placed on an ice-bath and brominated accord ing to literature (Tetrahedron 44,10,1988, 2977-2984) in very bad yield. N-Bromosuccinimide (3.45 g, 19.4 mmol) was added slowly at 00C and then left overnight at rt. No reaction was observed. An additional 3.45 g of N-bromosuccinimide was added during 8 h, and then the 97 reaction mixture was left at rt for 2 days. Aqueous concentrated Na 2

CO

3 was added and the mixture was extracted with dichloromethane (3 x 75 mL). The combined organic extracts were dried (MgSO4), filtered and evaporated. The oily residue was purified on a silica gel column with dichloromethane/MeOH (9:1) as eluent. Yield: 196 mg (28 %) of 5-bromo-4 5 isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl as an oil. 'H NMR (400 MHz, CDCl 3 ) 6 1.09 (d, J=6.57 Hz, 6H) 2.55-2.67 (m, 4H) 2.72-2.83 (m, 1H) 3.44-3.65 (m, 4H) 7.87 (s, 1 H) 8.12 (s, 1 H). "C NMR (400 MHz, CDC1 3 ) 6 18.71, 30.05, 45.19, 48.39, 48.68, 54.92, 126.04, 130.51, 144.16,154.31. 10 Step 3: 5-Bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl (0.196 g, 0.68 mmol), 4-acet amidophenylboronic acid (0.123 g, 0.69 mmol), bistriphenylphosphinpalladium(II)dichloride (0.015 g, 0.021 mmol) and Na 2

CO

3 (0.168 g, 1.37 mmol, dissolved in 2 mL H 2 0) were mixed 15 in acetonitril (16 mL) under a nitrogen atmosphere in a 20 mL microwave vessel. The reac tion mixture was heated 400 seconds at 1500C in a microwave oven. Some debromination was observed by LC-MS of the reaction mixture. The reaction mixture was evaporated and the residue was redissolved in a mixture of dichloromethane and H 2 0. The phases were separated and the aqueous phase was extracted with dichloromethane (3 x 50 mL). The 20 combined organic extracts were evaporated and the residue was dissolved in MeOH and purified according to preparative HPLC Method B. This afforded 49 mg (15 %) of the title compound as the trifluoroacetic acid salt. 'H NMR (400 MHz, DMSO-d) 6 1.30 (d, J=6.57 Hz, 6H) 2.03-2.11 (m, 3H) 3.09-3.20 (m, 2H) 3.23-3.34 (m, 2H) 3.56-3.66 (m, 5H) 4.55 (d, J=11.62 Hz, 2H) 7.69 (d, J=8.59 Hz, 2H) 7.94 25 (d, J=8.59 Hz, 2H) 8.49 (s, 1 H) 8.71 (s, 1 H) 10.13 (brs, 2H). 13C NMR (400 MHz, DMSO-d 6 ) 6 16.78, 24.38, 42.00, 47.27, 57.62, 119.49, 125.98, 131.08, 131.36,138.06,139.79,141.19,152.67,168.76. Example 57 (General Procedure 1) 30 [4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetonitrile, trifluoroacetate N CN N N HGC N

CH

3 98 4-Cyanomethylphenylboronic acid (0.137 g, 0.85 mmol), 5-bromo-4-isopropyl-3,4,5,6-tetra hydro-2H-[1,2']bipyrazinyl (0.242 g, 0.85 mmol), bistriphenylphosphinpalladium(II)dichloride (0.035 g, 0.080 mmol) and a 1 N Na 2

CO

3 solution in H 2 0 (1.7 mL)) were mixed in acetonitril (2 mL) under an atmosphere of nitrogen in a 5 mL microwave vessel. The reaction mixture 5 was heated 600 seconds at 1200C in a microwave oven. The reaction mixture was evaporated and the residue was dissolved in a mixture of H 2 0 and dichloromethane. The phases were separated and the aquoeus phase was extracted with dichloromethane (3 x 25 mL). The organic extracts were combined and trifluoroacetic acid was added. The volatiles were evaporated and the residue was dissolved in MeOH and purified according to 10 preparative HPLC Method B to give 35 mg (10 %) of the title compound. 'H NMR (400 MHz, CDC1 3 ) 6 1.40 (d, J=6.57 Hz, 6H) 2.92-3.03 (m, 2H) 3.54-3.65 (m, 5H) 3.81 (s, 2H) 4.48 (d, J=13.64 Hz, 2H) 7.42 (d, J=8.08 Hz, 2H) 7.91 (d, J=8.08 Hz, 2H) 8.24 (s, 1H) 8.55 (s, 1H) 12.43-13.00 (m, 1H). 13C NMR (400 MHz, CDC 3 ) 6 16.96, 23.78, 42.43, 47.56, 58.32, 118.13, 126.86, 128.92, 15 130.44, 130.50, 136.78, 139.24, 142.57, 152.99. Example 58 (General Procedure 1) 5-(4-Ethanesulfonylphenyl)-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trifluoroace tate H3 rN AN H3C N TFA 20 CH 3 4-Ethansulfonylphenylboronic acid (0.182 g, 0.85 mmol), 5-bromo-4-isopropyl-3,4,5,6-tetra hydro-2H-[1,2']bipyrazinyl (0.242 g, 0.85 mmol), bistriphenylphosphinpalladium(l I)dichloride (0.035 g, 0.080 mmol) and a 1 N Na 2

CO

3 solution in H 2 0 (1.7 mL)) were mixed in acetonitril (2 mL) under an atmosphere of nitrogen in a 5 mL microwave vessel. The reaction mixture 25 was heated 400 seconds at 1200C in a microwave oven. The reaction mixture was evaporated and the residue was dissolved in a mixture of H 2 0 and dichloromethane. The phases were separated and the aquoeus phase was extracted with dichloromethane (3 x 25 mL). The organic extracts were combined and trifluoroacetic acid was added. The volatiles were evaporated and the residue was dissolved in MeOH and purified according to HPLC 30 Method B to give 60 mg (12 %) of the title compound.

99 'H NMR (400 MHz, CD 3 OD) 6 1.24 (t, J=7.33 Hz, 3H), 1.42 (d, J=6.57 Hz, 6H), 3.20 (q, J=7.58 Hz, 2H), 3.28-3.39 (m, 4H), 3.56-3.68 (m, 3H), 4.60-4.79 (m, 2H), 4.86 (brs, 6H), 7.96 (d, J=8.59 Hz, 2H), 8.20 (d, 2H), 8.44 (s, 1 H), 8.76 (s, 1 H). 13C NMR (400 MHz, CD 3 0D) 6 8.04, 17.47, 43.47, 51.67, 60.46, 127.68, 130.30, 132.37, 5 139.42, 141.14,141.74,143.74,155.02. Example 59 (General Procedure 1) N-{4-[6-(4-Isopropylpiperazin-1-yl)pyridin-3-yl]phenyl}acetamide, dihydrochloride H N O HN N H3C YN,, 2 HCI

CH

3 10 The title compound was prepared by a similar procedure to that described in Example 56, starting from 1-(5-bromo-pyridin-2-yl)-4-isopropyl-piperazine and 4-acetamidophenylboronic acid. 'H NMR (400 MHz, DMSO-d) 5 11.25 (brs, 1H), 10.18 (s, 1H), 8.38 (s, 1H), 8.16 (d, 1H), 7.70 (d, 2H), 7.62 (d, 2H), 7.28 (d, 1H), 4.53 (d, 2H), 3.65-3.45 (m, 5H), 3.20-3.08 (m, 2H), 15 2.06 (s, 3H), 1.33 (d, 6H). Microanalysis for C 20

H

2 6

N

4 0, 2 x HCI, 1.5 x H 2 0: Calculated: C: 54.80%; H: 7.13%; N: 12.78%; Found: C: 54.55%; H: 6.84%, N: 12.42%. 20 Example 60 (General Procedure L) Cyclopropanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl) phenyl]amide, dihydrochloride 0 N N 1-N HOC Y2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 176, 25 starting from 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenylamine and cyclopropanecarboxylic acid.'H NMR (400 MHz, DMSO-d 6 ) 6 11.24 (brs, 1H), 10.52 (s, 1H), 100 8.70 (s, 1H), 8.47 (s, 1H), 7.92 (d, 2H), 7.72 (d, 2H), 4.49 (d, 2H), 3.55-3.44 (m, 5H), 3.15 3.04 (m, 2H), 1.91-1.83 (m, 1 H), 1.32 (d, 6H), 0.83-0.75 (m, 4H). Microanalysis for C21 H 27

N

5 0, 2 x HCI, 2.25 x H 2 0: Calculated: C: 52.67%; H: 7.05%; N: 14.62%; 5 Found: C: 52.79%; H: 7.00%, N: 14.53%. Example 61 (General Procedure L) 2-Cyclopropyl-N-[4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl] acetamide, dihydrochloride H NO N 2HCI 10 CH3 The title compound was prepared by a similar procedure to that described in Example 176, starting from 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenylamine and cyclopropylacetic acid.'H NMR (400 MHz, DMSO-d 6 ) 6 11.00 (brs, 1H), 10.06 (s, 1H), 8.71 (s, 1H), 8.46 (s, 1H), 7.92 (d, 2H), 7.71 (d, 2H), 4.49 (d, 2H), 3.52-3.42 (m, 5H), 3.15-3.04 (m, 15 2H), 2.23 (d, 2H), 1.30 (d, 6H), 1.10-1.00 (m, 1H), 0.50-0.44 (m, 2H), 0.22-0.17 (m, 2H). Microanalysis for C 22

H

2 9

N

5 0, 2 x HCI, 0.75 x H 2 0: Calculated: C: 56.71%; H: 7.03%; N: 15.05%; Found: C: 56.51%; H: 6.73%, N: 14.82%. 20 Example 62 (General Procedure L) 4-Methoxycyclohexanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl 5'-yl)phenyl]amide, dihydrochloride H3O'CH N N N 0 H-1C YN,) 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 176, 25 starting from 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenylamine and 4- 101 methoxycyclohexanecarboxylic acid.'H NMR (400 MHz, DMSO-d 6 ) 6 11.22 (brs, 1 H), 10.08 (d, 1 H), 8.71 (s, 1 H), 8.48 (s, 1 H), 7.93 (d, 2H), 7.71 (d, 2H), 4.51 (d, 2H), 3.55-3.38 (m, 5H), 3.25 + 3.22 (2 x s, 3H), 3.16-3.04 (m, 2H), 2.47-2.29 (m, 1H), 2.11-1.06 (m, 14 H). Microanalysis for C 25

H

35

N

5 0 2 , 2 x HCI, 1.25 x H 2 0: 5 Calculated: C: 56.33%; H: 7.47%; N: 13.14%; Found: C: 56.27%; H: 7.38%, N: 12.61%. Example 63 (General Procedure K) 4-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl}morpholine, trifluoroacetate N N K> N

H

3 C N2 TFA 10 CH 3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde and morpholine. 'H NMR (300 MHz, D 2 0) 6 8.29 (dd, 1H), 8.21 (d, 1H), 7.65 (d, 2H), 7.52 (d, 2H), 7.34 (d, 1H), 4.36-4.32 (m, 4H), 4.02-3.98 (m, 2H), 3.71-3.50 (m, 7H), 3.37-3.12 (m, 6H), 1.28 (d 15 6H). HPLC (Method D): tr = 2.45 min (97 %). Example 64 (General Procedure A) 4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]benzonitrile N N N H3C N,) 20 CH 3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -isopropylpiperazine and 4-(2-chloro-pyrimidin-5-yl)benzonitrile. 'H NMR (400 MHz, DMSO-d 6 ) 6 11.34 (brs, 1H), 8.91 (s, 2H), 7.92 (s, 4H), 4.81 (d, 2H), 3.63-3.43 (m, 5H), 3.12-3.01 (m, 2H), 1.31 (d, 6 H). 25 Microanalysis for C1 8

H

21

N

5 , 2 x HCI, 0.75 x H 2 0: Calculated: C: 54.90%; H: 6.27%; N: 17.78%; 102 Found: C: 55.23%; H: 6.45%, N: 17.54%. Example 65 N-{4-[2-(4-Isopropylpiperazin-1-yl)pyrimidin-5-yl]benzyl}acetamide, dihydrochloride NN N N H 3C YN,, 5

CH

3 2 HCI The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]benzonitrile. 1 H NMR (300 MHz, CDC1 3 ) 6 8.79 (s, 2H), 7.53 (d, 2H), 7.45 (d, 2H), 5.06 (d, 2H), 4.47 (s, 10 2H), 4.15-4.01 (m, 2H), 3.65-3.52 (m, 3H), 3.32-3.19 (m, 2H), 2.13 (s, 3H), 1.48 (d, 6 H). HPLC (Method A): tr = 6.66 min (100 %). Microanalysis for C20H 27

N

5 O, 2 x HCI, 4 x H 2 0: Calculated: C: 48.19%; H: 7.48%; N: 14.05%; Found: C: 48.19%; H: 7.03%, N: 13.66%. 15 Example 66 (General Procedure 1) 4-[6-(4-Cyclopropylpiperazin-1 -yl)-piperidin-3-yl]-N,N-dimethylbenzamide, dihydrochloride 0 N' CH3 CH N N N 2 HCI Step 1: 20 1-(5-Bromopyridin-2-yl)-piperazine jy Br rN N HNQ A mixture of piperazine (107 g, 1.24 mol) and 2-chloro-5-bromopyridine (30 g, 156 mmol) in toluene (150 mL) was heated at 130 0 C for 2 hours, The reaction mixture was cooled to room temperature and toluene (400 mL) and water (200 mL) were added. The organic phase was 103 isolated and the aqeuous phase was extracted once with toluene (100 mL). The collected organic phases were washed with water (150 mL) and brine (100 mL), dried over magnesium sulphate and evaporated to dryness in vacuo to give 30.1 g (80 %) of 1-(5-bromopyridin-2 yl)-piperazine. 5 1 H NMR (400 MHz, CDC13) 6 8.19 (d, 1H), 7.52 (dd, 1H), 6.54 (d, 1H), 3.47 (m, 4H), 2.97 (m, 4H), 1.77 (broad s, 1 H) Step 2: 1-(5-Bromopyridin-2-yl)-4-cyclopropylpiperazine: Br N N 10 [(1-Ethoxy-cyclopropyl)oxyjtrimethylsilane (26 mL, 129.3 mmol) was added to a solution of 1 (5-bromopyridin-2-yl)-piperazine (15 g, 62.0 mmol) in THF (120 mL). Water (24 mL), acetic acid (11 mL), and 1 M NaCNBH 3 in THF (90 mL, 90 mmol) were added to the reaction mix ture, which was then heated at reflux temperature for 3 hours. The resulting solution was 15 cooled to rt and evaporated to dryness in vacuo. The residue was dissolved in a mixture of dichloromethane (200 mL) and water (50 mL) and 4 N sodium hydroxide (20 mL) was added to pH 8-9. The organic phase was isolated and the aqeoues phase was extracted with further dichloromethane (100 mL). The combined organic phases were evaporated to dryness in vacuo and the residue was purified on a silica gel column (gradient: from 5 % ethyl acetate in 20 heptane to 100 % ethyl acetate over 40 min.). This afforded 13.1 g (75 %) of 1-(5 bromopyridin-2-yl)-4-cyclopropylpiperazine. 1 H NMR (400 MHz, CDC13) 6 8.19 (d, 1H), 7.52 (dd, 1H), 6.54 (d, 1H), 3.47 (m, 4H), 2.70 (m, 4H), 1.64 (m, 1 H), 0.48 (m, 4H). 25 Step 3: A mixture of 1-(5-bromopyridin-2-yl)-4-cyclopropylpiperazine, (2.5 g, 8.86 mmol), 4-(N,N dimethylaminocarbonyl)-phenyl boronic acid (2.5 g, 13.0 mmol), tetrakis(triphenylphosphine) palladium(0) (300 mg, 0.26 mmol), and anhydrous sodium carbonate (2.0 g, 18.9 mmol) was purged with nitrogen. 1,2-Dimethoxyethane (30 mL) and water (7 mL) were added and the 30 reaction mixture was heated at 800C for 1.5 hours and filtered upon cooling to 0-5oC. The crystals were washed with water (20 mL), dried and then dissolved in acetone (130 mL). Ad- 104 dition of HCIg in methanol afforded 1.41 g (37 %) of 4-[6-(4-cyclopropylpiperazin-1-yl) piperidin-3-yl]-N,N-dimethylbenzamide, dihydrochloride. 'H NMR (400 MHz, DMSO-d 6 ) 6 11.36 (brs, 1H), 8.50 (d, 1H), 8.18 (dd, 1H) 7.75 (d, 2H), 7.50 (d, 2H), 7.26 (d, 1H), 4.51 (d, 2H), 3.56 (m, 4H), 3.53 (brs, 2H), 3.00 (s, 3H), 2.96 (s, 5 3H), 2.89 (brs, 1 H), 1.20 (m, 2H), 0.82 (m, 2H). Example 67 (General Procedure 1) N-{4-[6-(4-Cyclopropylpiperazin-1 -yl)pyridazin-3-yl]-2-methoxyphenyl}acetamide OCH 3 H N O CH 3 N N' N, 10 The title compound was prepared from 3-chloro-6-(4-cyclopropyl-piperazin-1-yl)-pyridazine (4.6 g, 19.3 mmol), 1 M sodium carbonate solution (50 mL, 100,5 mmol), acetonitrile (50 mL), bis(triphenylphosphine)palladium(II)chloride (0.68 g, 0.96 mmol) and N-[2-methoxy-4 (4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]acetamide (6.73 g, 23.1 mmol), yield 3.39 g (40 %). 15 'H NMR (400 MHz, CDCl 3 ) 6 8.44 (d, 1H), 7.94 (d, 1H), 7.86 (s, 1H), 7.66 (d, 1H), 7.34 (dd, 1H), 6.98 (d, 1H), 3.98 (s, 3H), 3.69 (m, 4H), 2.77 (m, 4H), 2.23 (s, 3H), 1.67 (m, 1H), 0.49 (m, 4H). Example 68 (General Procedure 1) 20 N-{3-[6-(4-Isopropylpiperazin-1 -yl)-4-methylpyridin-3-yl]phenyl}acetamide 0 N N CH3 I H ( N CH 3 H3C N,,)

CH

3 Step 1: 1-(5-Bromo-4-methyl-pyridin-2-yl)-4-isopropyl-piperazine 105 Br N CH 3 H3C N

CH

3 To a solution of 2,5-dibromo-4-methyl-pyridine (5.0 g, 20 mmol) and isopropyl-piperazine (25.6 g, 200 mmol) were added pyridine (2.06 g, 206 mmol). The reaction mixture was re fluxed for 5 h under a nitrogen atmosphere. Brine was added and the mixture was extracted 5 with EtOAc. The organic extract was washed with brine and 0.5 N hydrochloric acid. The acidic layer was made alkaline with Na 2

CO

3 to pH 8 and then extracted with CH 2 Cl 2 . The or ganic extract was dried (Na 2

SO

4 ) and concentrated to give 5.4 g (90 %) of 1-(5-bromo-4 methyl-pyridin-2-yl)-4-isopropyl-piperazine. 1 H NMR (300 MHz, CDC1 3 ) 6 8.15 (s, 1H), 6.51 (s, 1H), 3.50 (t, 4H), 2.81-2.65 (m, 1H), 2.61 10 (t, 4H), 2.29 (s, 3H), 1.08 (d, 6H). Step 2: To a solution of 1-(5-bromo-4-methyl-pyridin-2-yl)-4-isopropyl-piperazine (0.59 g, 2 mmol) in 1,4-dioxane (12 mL) and water (3 mL) was added 3-acetylamino-phenylboronic acid (430 15 mg, 2.4 mmol), Pd(PPh 3

)

4 (231 mg, 0.2 mmol) and TEA (404 mg, 4 mmol). The resulting mix ture was degassed and heated at 1004C for 4 h under a nitrogen atmosphere. The mixture was diluted with EtOAc and water. The organic layer was separated and the aqueous phase was extracted with EtOAc. The combined organic layers were washed with brine, dried (Na 2 SO4), concentrated and purified by chromatography on silica gel eluting with 20 CH 2 Cl 2 /MeOH (100:1). This afforded 138 mg (15 %) of the title compound. 1 H NMR (300 MHz, CDC1 3 ) 6 8.00 (s, 1 H), 7.57-7.50 (m, 2H), 7.50-7.29 (m, 2H), 7.00 (d, 1 H), 6.52 (s, 1H), 3.59 (t, 4H), 2.79-2.70 (m, 1H), 2.66 (t, 4H), 2.30 (s, 3H), 2.16 (s, 3H), 1.10 (d, 6H). HPLC (Method D): t, = 3.90 min (96 %). 25 Example 69 (General Procedure 1) N-{3-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridin-3-yl]phenyl}acetamide 106 O N N CH I H 3 HC N,) OH

CH

3 The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-3-methyl-pyridin-2-yl)-4-isopropyl-piperazine and 3-acetylamino phenylboronic acid. 1 H NMR (300 MHz, CDC 3 ) 6 8.35 (d, 1 H), 7.77 (s, 1 H), 7.58 (d, 1 H), 5 7.46 (d, 2H), 7.35 (t, 1 H), 3.32 (t, 4H), 2.92-2.75 (m, 5H), 2.30 (s, 3H), 2.19 (s, 3H), 1.14 (d, 6H). HPLC (Method D): tr = 4.49 min (97 %). Example 70 (General Procedure 1) 10 N-{4-[6-(4-Isopropylpiperazin-1 -yl)-4-methylpyridin-3-yl]phenyl}acetamide, trifluoroacetate H IN -CH 3 N OH 3

H

3 C N

CH

3 TFA The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-4-methyl-pyridin-2-yl)-4-isopropyl-piperazine and 4-acetylamino phenylboronic acid. 1 H NMR (300 MHz, CD 3 0D) 6 7.91 (s, 1H), 7.67 (d, 2H), 7.28 (d, 2H), 15 7.18 (s, 1H), 4.75-3.35 (m, 9H), 2.35 (s, 3H), 2.14 (s, 3H), 1.41 (d, 6H). HPLC (Method D): tr = 2.93 min (98 %). Example 71 (General Procedure I) N-{4-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridin-3-yl]phenyl)acetamide, trifluoroacetate H N 2 N / CH3 N H3C NC 20 C 107 The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-3-methyl-pyridin-2-yl)-4-isopropyl-piperazine and 4-acetylamino phenylboronic acid. 1 H NMR (300 MHz, CD 3 0D) 6 8.37 (d, 1 H), 8.06 (s, 1 H), 7.68 (d, 2H), 7.58 (d, 2H), 3.99-3.71 5 (m, 2H), 3.62-3.55 (m, 3H), 3.52-3.31 (m, 4H), 2.44 (s, 3H), 2.13 (s, 3H), 1.42 (d, 6H). HPLC (Method E): tr = 3.53 min (98 %). Example 72 (General Procedure 1) N-{4-[6-(4-Isopropylpiperazin-1 -yl)-4-methylpyridazin-3-yl]phenyl}acetamide, trifluoroacetate H N N HC N TFA 10 CH 3 Step 1: N-[4-(6-Chloro-5-methyl-pyridazin-3-yl)-phenyl]-acetamide and N-[4-(6-chloro-4-methyl pyridazin-3-yl)-phenyl]-acetamide H H O H 3 Y NO HO N H 3 and N OH 3 -N -N 15 01 N11 1 N N A solution of 4-acetamidophenylboronic acid (2.7 g, 15 mmol), 3,6-dichloro-4-methyl pyridazine (1.6 g, 10 mmol) and Pd(PPh 3

)

4 (1.2 g, 1 mmol) in DMF (58 mL, degassed) was stirred at rt for 1 h. Then sodium carbonate (3.9 g in 15 mL water, degassed) was added and 20 the mixture was heated with stirring at 800C ovemight. The mixture was filtered and the fil trate was concentrated under reduced pressure. The residue was diluted with EtOAc (30 mL), washed with brine, dried (sodium sulfate) and concentrated to give a crude product, which was purified by column chromatography on silica gel (EtOAc/petroleum ether = 1:1). This afforded 1 g (39 %) of a mixture of N-[4-(6-chloro-5-methyl-pyridazin-3-yl)-phenyl] 25 acetamide and N-[4-(6-chloro-4-methyl-pyridazin-3-yl)-phenyl]-acetamide, which was used directly in the next step.

108 Step 2: The mixture of isomers (0.85 g, 3.2 mmol) from the previous step and 1 -isopropyl-piperazine (2.1 g, 16 mmol) was heated at 2000C under a nitrogen atmosphere for 1 h. The mixture was cooled to rt and diluted with dichloromethane (15 mL). The mixture was washed with brine, 5 dried (sodium sulfate) and concentrated to give a crude product, which was purified by preparative HPLC Method F to give 261 mg (8 %) of N-{4-[6-(4-isopropyl-piperazin-1 -yl)-4 methyl-pyridazin-3-yl]-phenyl}-acetamide and 74 mg (2 %) of N-{4-[6-(4-isopropyl-piperazin 1 -yl)-5-methyl-pyridazin-3-yl]-phenyl}-acetamide as the TFA salts. N-{4-[6-(4-isopropyl-piperazin-1 -yl)-4-methyl-pyridazin-3-yl]-phenyl}-acetamide: 10 1 H NMR (300 MHz, CD 3 OD) 6 7.89 (s, 1H), 7.82 (d, 2H), 7.56 (d, 2H), 4.70-3.30 (m, 9H), 2.44 (s, 3H), 2.17 (s, 3H), 1.42 (d, 6H). HPLC (Method D): t, = 2.88 min (99 %). Example 73 (General Procedure 1) 15 N-{3-[6-(4-Cyclopropylpiperazin-1 -yl)-4-methylpyridin-3-yl]phenyl}acetamide, trifluoroacetate H3K N CH H N N TFA The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-4-methyl-pyridin-2-yl)-4-cyclopropyl-piperazine and 3-acetylamino phenylboronic acid. 1 H NMR (300 MHz, CD 3 0D) 6 7.92 (s, 1H), 7.72 (d, 1H), 7.53-7.40 (m, 20 2H), 7.34 (s, 1H), 7.10-7.05 (m, 1H), 4.05-3.92 (m, 4H), 3.68-3.58 (m, 4H), 2.95-2.85 (m, 1H), 2.39 (s, 3H), 2.13 (s, 3H), 1.15-0.95 (m, 4H). HPLC (Method D): t, = 2.99 min (94 %). Example 74 (General Procedure 1) 25 3-[6-(4-Cyclopropylpiperazin-1 -yl)-4-methylpyridin-3-yl]-N,N-dimethylbenzamide, trifluoroace tate H3 ' H N H H 0

TEA

109 The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-4-methyl-pyridin-2-yl)-4-cyclopropyl-piperazine and 3-(N,N-dimethyl amino-carbonyl)-phenylboronic acid. 1 H NMR (300 MHz, CD 3 OD): 6 7.96 (s, 1H), 7.62-7.52 (m, 1 H), 7.52-7.45 (m, 2H), 7.45-7.38 (m, 1 H), 4.05-3.88 (m, 4H), 3.68-3.55 (m, 4H), 3.11 (s, 5 3H), 3.03 (s, 3H), 2.95-2.85 (m, 1 H), 2.37 (s, 3H), 1.15-0.95 (m, 4H). HPLC (Method D): tr = 3.04 min (98 %). Example 75 (General Procedure 1) N-{4-[6-(4-Cyclopropylpiperazin-1 -yi)-4-methylpyridin-3-yl]phenyllacetamide, trifluoroacetate H

CH

3 i' N CH3 N N N N TFA 10 The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-4-methyl-pyridin-2-yl)-4-cyclopropyl-piperazine and 4-acetamido phenylboronic acid. 'H NMR (300 MHz, CD 3 0D): 6 7.90 (s, 1H), 7.67 (d, 2H), 7.35-7.22 (m, 3H), 4.05-3.88 (m, 4H), 3.68-3.55 (m, 4H), 2.95-2.82 (m, 1 H), 2.37 (s, 3H), 2.14 (s, 3H), 1.15 15 0.95 (m, 4H). HPLC (Method D): tr = 2.68 min (99 %). Example 76 (General Procedure 1) 4-[6-(4-Cyclopropylpiperazin-1-yl)-4-methylpyridin-3-yl]-N,N-dimethylbenzamide, trifluoroace 20 tate 0 CH 3e CH3 CH3 N N N,, TFIA The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(5-bromo-4-methyl-pyridin-2-yl)-4-cyclopropyl-piperazine and 4-(N,N dimethylamino-carbonyl)-phenylboronic acid. 'H NMR (300 MHz, CD 3 OD): 6 7.95 (s, 1H), 110 7.55 (d, 2H), 7.46 (d, 2H), 7.34 (s, 1 H), 4.05-3.88 (m, 4H), 3.68-3.55 (m, 4H), 3.12 (s, 3H), 3.04 (s, 3H), 2.97-2.85 (m, 1 H), 2.39 (s, 3H), 1.18-0.95 (m, 4H). HPLC (Method D): t, = 3.04 min (94 %). 5 Example 77 (General Procedure 1) 5-1,3-Benzodioxol-5-yl-2-(4-cyclopropylpiperazin-1 -yl)pyrimidine, dihydrochloride - 0 I> rN N N, 2 HCI The title compound was prepared by a similar procedure to that described in Example 68, starting from 5-bromo-2-(4-cyclopropyl-piperazin-1-yl)-pyrimidine and 3,4-(methylenedioxy) 10 phenylboronic acid. Mp = 275-2790C. 1 H NMR (300 MHz, DMSO-d) 5 11.0 (brs, 1H), 8.73 (s, 2H), 7.30 (s, 1H), 7.14 (d, 1H), 7.01 (d, 1 H), 6.06 (s, 2H), 4.76-4.71 (m, 2H), 3.58-3.18 (m, 6H), 2.91-2.80 (m, 1 H), 1.20-1.12 (m, 2H), 0.86-0.78 (m, 2H). HPLC (Method Rx): tr = 11.49 min (100 %). 15 Example 78 (General Procedure 1) N-{4-[6-(4-isopropylperhydro-1,4-diazepin-1-yl)pyridazin-3-yl]phenyl}acetamide, dihydrochlo ride H N O CH 3 H 3C N N 'N HsC N2 HOI

H

3 C U"N~ . 20 The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(6-chloro-pyridazin-3-yl)-4-isopropyl-perhydro-1,4-diazepine and 4-acetamido phenylboronic acid. 1 H NMR (400 MHz, CD 3 0D) 6 8.43 (d, 1H), 8.03 (d, 1H), 7.94 (m, 2H), 7.84 (m, 2H), 4.36 (m, 1H), 4.17 (m, 1H), 4.03 (m, 1H), 3.73 (m, 4H), 3.42 (m, 2H), 2.50 (m, 1 H), 2.39 (m, 1 H), 2.17 (s, 3H), 1.41 (d, 6H). 25 HPLC-MS (Method G): M+1 = 354; t,= 0.73 min. Example 79 (General Procedure 1) 4-[6-(4-Isopropyl-perhydro-1,4-diazepin-1 -yl)-pyridazin-3-yl]-phenylamine /

NH

2 H3C / N N..

H

3 C The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(6-chloro-pyridazin-3-yl)-4-isopropyl-perhydro-1,4-diazepine and 4-amino 5 phenylboronic acid, pinacol cyclic ester. 'H NMR (400 MHz, CDC1 3 ) 6 7.82 (d, 2H), 7.53 (d, 1 H), 6.76 (m, 3H), 3.86 (t, 2H), 3.77 (m, 4H), 2.93 (heptet, 1 H), 2.81 (m, 2H), 2.58 (m, 2H), 1.95 (m, 2H), 1.00 (d, 6H). HPLC-MS (Method G): M+1 = 312; tr= 0.61 min. 10 Example 80 (General Procedure 1) N-{4-[6-(4-Cyclopropyl-[1,4]diazepan-1 -yl)pyridazin-3-yl]phenyl}acetamide, dihydrochloride H N OH CH, fINN /-'N N'N N 2 HCI The title compound was prepared by a similar procedure to that described in Example 68, starting from 1-(6-chloro-pyridazin-3-yl)-4-cyclopropyl-perhydro-1,4-diazepine and 4-acet 15 amidophenylboronic acid. 1 H NMR (400 MHz, CD 3 OD) 6 8.47 (d, 1H), 8.08 (d,1H), 7.94 (d, 2H), 7.85 (d, 2H), 4.33 (broad m, 1 H), 4.12 (broad m, 1 H), 3.91 (broad m, 4H), 3.62 (broad m, 2H), 2.97 (hept, 1 H), 2.55 ((broad m, 1 H), 2.43 (broad m, 1 H), 2.17 (s, 3H), 1.24 (broad m, 2H), 1.01 (d, 2H). HPLC-MS (Method G): M+1 = 352; tr= 0.82 min. 20 Example 81 (General Procedure 1) 7-[6-(4-Cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-4-methyl-3,4-dihydro-2H-1,4-benzoxazine, dihydrochloride 112 H 3 N J N N' N 2 HCI The title compound was prepared by a similar procedure to that described in Example 68, starting from 3-chloro-6-(4-cyclopropyl-piperazin-1-yl)-pyridazine and 4-methyl-7-(4,4,5,5 tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-1,4-benzoxazine. 'H NMR (400 MHz, 5 DMSO-d) 6 8.47 (d, 1 H), 8.04 (d, 1 H), 7.61 (m, 1 H), 7.49 (m, 1 H), 6.85 (d, 1 H), 4.50 (broad m, 2H), 4.26 (m, 2H), 3.61 (broad m, 4H), 3.40 (m, 4H), 2.97 (s, 3H), 2.88 (broad m, 1H), 1.23 (m, 2H), 0.82 (m, 2H). HPLC-MS (Method G): M+1 = 352; t,= 0.83 min. 10 Example 82 (General Procedure I) 3-(4-Cyclopropylpiperazin-1-yl)-6-(2,3-dihydro-1,4-benzodioxin-6-yl)pyridazine, dihydrochlo ride 0 NN N, 2 HCI The title compound was prepared by a similar procedure to that described in Example 68, 15 starting from 3-chloro-6-(4-cyclopropyl-piperazin-1-yl)-pyridazine and 1,4-benzodioxane-6 boronic acid. 1 H NMR (400 MHz, DMSO-d) 6 8.38 (d, 1H), 7.95 (d, 1H), 7.63 (m, 1H), 7.58 (m, 1H), 7.05 (d, 1H), 4.57 (broad m, 2H), 4.32 (m, 4H), 3.63 (broad m, 4H), 3.39 (broad m, 2H), 2.88 (broad m, 1 H), 1.23 (m, 2H), 0.82 (m, 2H). HPLC-MS (Method G): M+1 = 339; tr= 0.84 min. 20 Example 83 (General Procedure 1) 5-[6-(4-Cyclopropylpiperazin-1 -yl)pyridazin-3-yl]-1 H-indole, dihydrochloride 113 H N NN N N )! $N 2 HCI The title compound was prepared by a similar procedure to that described in Example 68, starting from 3-chloro-6-(4-cyclopropyl-piperazin-1-yl)-pyridazine and 5-indoleboronic acid. 'H NMR (400 MHz, DMSO-d) 6 11.49 (s, 1H), 8.43 (d, 1H), 8.28 (s, 1H), 7.93 (d, 1H), 7.82 5 (dd, 1H), 7.57 (d, 1H), 7.48 (t, 1H), 6.58 (s, 1H), 4.54 (d, 2H), 3.70-3.45 (m, 4H), 3.45-3.30 (m, 2H), 2.88 (m,1 H), 1.21 (m, 2H), 0.83 (m, 2H). HPLC-MS (Method G): M+1 = 320; t,= 0.75 min. Example 84 (General Procedure 1) 10 {4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]phenyl}acetonitrile, dihydrochloride N N H3C N 2 HC1'

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-2-(4-isopropylpiperazin-1 -yl)-pyrimidine and 4-cyanomethyl phenylboronic acid. 15 Example 85 (General Procedure 1) N-{4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]phenyl}acetamide, dihydrochloride H NN Y CH 3 N 0 HOCN N 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 20 starting from 5-bromo-2-(4-isopropylpiperazin-1-yl)-pyrimidine and 4-acetamidophenyl boronic acid.

114 Mp > 2750C. 1 H-NMR (400 MHz, CD 3 0D) 6 8.65 (s, 2H), 7.65 (d, 2H), 7.50 (d, 2H), 5.0 (m, 2H), 3.65-3.55 (m, 3H), 3.35-3.25 (m, 2H), 3.20-3.10 (m, 2H), 2.15 (s, 3H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 340; t,= 0.919 min. 5 Example 86 (General Procedure 1) 1-{4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]phenyl}ethanone, dihydrochloride 0

CH

3 rN N

H

3 C YN,,) 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 10 starting from 5-bromo-2-(4-isopropylpiperazin-1-yl)-pyrimidine and 4-acetylphenylboronic acid. 1 H-NMR (400 MHz, CD 3 OD) 6 8.75 (s, 2H), 8.10 (d, 2H), 7.70 (d, 2H), 5.10-5.00 (m, 2H), 3.65-3.55 (m, 3H), 3.40-3.30 (m, 2H), 3.25-3.15 (m, 2H), 2.65 (s, 3H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 322; tr = 1.07min. 15 Example 87 (General Procedure 1) 2-(4-Isopropylpiperazin-1 -yl)-5-pyridin-3-ylpyrimidine, trihydrochloride N N

H

3 C ~N.) H, 3 H C I

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 20 starting from 5-bromo-2-(4-isopropylpiperazin-1 -yl)-pyrimidine and 3-pyridylboronic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 9.15 (s, 1H), 8.85 (s, 2H), 8.80 (m, 2H), 8.05 (m, 1H), 5.15 5.05 (m, 2H), 3.65-3.55 (m, 3H), 3.45-3.35 (m, 2H), 3.25-3.10 (m, 2H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 284; t,= 0.38 min. 25 Example 88 (General Procedure 1) 115 2-(4-Isopropylpiperazin-1 -yl)-5-pyridin-4-ylpyrimidine, trihydrochloride 3>NN rN N HsCN H 3CY NJ3 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-2-(4-isopropylpiperazin-1 -yl)-pyrimidine and 4-pyridylboronic acid. 5 'H-NMR (400 MHz, CD 3 0D) 6 9.10 (s, 2H), 8.80 (d, 2H), 8.30 (d, 2H), 5.25-5.05 (m, 2H), 3.70-3.55 (m, 3H), 3.55-3.35 (m, 2H), 3.35-3.15 (m, 2H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 284; t, = 0.337 min. Example 89 (General Procedure 1) 10 (4-[2-(4-Isopropylpiperazin-1 -yl)pyrimidin-5-yl]phenyl}dimethylamine, trihydrochloride pH3 N N ' C H 3 N HsCN H N3 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-2-(4-isopropylpiperazin-1 -yl)-pyrimidine and N,N-dimethylamino phenylboronic acid. 15 'H-NMR (400 MHz, CD 3 OD) 6 8.70 (s, 2H), 7.75 (d, 2H), 7.55 (d, 2H), 5.10-5.00 (m, 2H), 3.65-3.55 (m, 3H), 3.40-3.30 (m, 2H), 3.25 (s, 6H), 3.22-3.10 (m, 2H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 326; t,= 0.729 min. Example 90 (General Procedure 1) 20 3-[2-(4-Isopropylpiperazin-1-yl)pyrimidin-5-yl]-N,N-dimethylbenzamide, dihydrochloride N NH H3C NJ

CH

3 2 HCI 116 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-2-(4-isopropylpiperazin-1-yl)-pyrimidine and 3-(dimethylamino carbonyl)phenylboronic acid. Mp = 217-220 0 C. 5 'H-NMR (400 MHz, CD 3 OD) 6 8.70 (s, 2H), 7.70 (d, 1 H), 7.65 (s, 1 H), 7.55 (d,d, 1 H), 7.40 (d, 1H), 5.05-4.95 (m, 2H), 3.65-3.55 (m, 3H), 3.35-3.25 (m, 2H), 3.20-3.10 (m, 2H), 3.12 (s, 3H), 3.05 (s, 3H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 354; tr= 0.938 min. 10 Example 91 (General Procedure 1) N,N-Diisopropyl-4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)benzamide, hy drochloride 0 CH N 1'CH3 N

H

3 C ICH 3 N N H3C YN HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 15 starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-diisopropyl aminocarbonylphenylboronic acid. 1 H NMR (400 MHz, DMSO-d) 6 8.63 (s, 1H), 8.32 (s, 1H), 8.00 (d, 1H), 7.91 (s, 1H), 7.55 (dd, 1 H); 7.33 (d, 1 H), 4.60-4.50 (m, 2H), 3.95-3.85 (m, 1 H), 3.70-3.60 (m, 1 H), 3.65-3.55 (m, 3H), 3.25-3.10 (m, 4H), 1.60-1.50 (brs, 6H), 1.25-1.10 (brs, 6H). 20 HPLC-MS (Method G): M+1 = 410; tr= 1.32 min. Example 92 (General Procedure 1) (4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-(4-methylpiperidin-1 -yl) methanone, hydrochloride 25 117 0 N

CH

3 N N HOC

OH

3 HCI The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and (4-methyl piperidin-1 -yl)carbonylphenylboronic acid. 5 1 H-NMR (400 MHz, CD 3 0D) 6 8.65 (s, 1 H), 8.35 (s, 1 H), 8.02 (d, 2H), 7.50 (d, 2H), 4.65-4.55 (m, 3H), 3.80-3.70 (m, 1 H), 3.65-3.55 (m, 3H), 1.85-1.75 (m, 1 H), 1.75-1.60 (m, 2H), 1.40 (d, 6H), 1.25-1.05 (m, 2H), 0.95 (d, 3H). HPLC-MS (Method G): M+1 = 408; tr= 1.31 min. 10 Example 93 (General Procedure 1) 4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-N,N-dimethylbenzamide, hydro chloride 0 OH N'CH 3 N CH 3 N N H3C N HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 15 starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-dimethyl aminocarbonylphenylboronic acid. 1 H-NMR (400 MHz, CD 3 OD) 6 8.65 (s, 1 H), 8.35 (s, 1 H), 8.02 (d, 2H), 7.53 (d, 2H), 4.65-4.55 (m, 2H), 3.65-3.55 (m, 3H), 3.35-3.15 (m, 4H), 3.13 (s, 3H), 3.04 (s, 3H), 1.40 (d, 6H). HPLC-MS (Method G): M+1 = 354; tr= 0.93 min. 20 Example 94 (General Procedure 1) [3-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]morpholin-4-ylmethanone, hydrochloride 118 N> N HG N N) Y 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and N-(morpholin-4 yl) 3-boronobenzamide. 5 'H-NMR (400 MHz, CD 3 0D) 6 8.70 (s, 1H), 8.45 (s, 1H), 8.07 (d, 1H), 8.01 (s, 1H), 7.58 (dd, 1 H), 7.45 (d, 1 H), 4.75-4.65 (m, 2H), 3.85-3.43 (m, 11 H), 3.40-3.20 (m, 4H), 1.40 (d, 6H). Example 95 (General Procedure 1) N-{4-[5-(Octahydropyrido[1,2-a]pyrazin-2-yl)pyrazin-2-yl]phenyl}acetamide, hydrochloride H N Y; 0~ N N N 10 N:C HI The title compound was prepared by a similar procedure to that described in Example 57, starting from 2-(5-bromopyrazin-2-yl)octahydropyrido[1,2-a]pyrazine and 4-acetamidophenyl boronic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 8.95 (s, 1 H), 8.47 (s, 1 H), 7.85 (d, 2H), 7.80 (d, 2H), 4.80-4.60 15 (m, 2H), 3.60-3.50 (m, 3H), 3.45-3.29 (m, 3H), 3.15-3.00 (m, 1H), 2.15 (s, 3H), 2.10-2.05 (m, 1 H), 2.02-1.90 (m, 3H), 1.79-1.62 (m, 2H). HPLC-MS (Method G): M+1 = 352; t,= 0.92 min. Example 96 (General Procedure 1) 20 4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenol, dihydrochloride OH N

H

3 C HN, CH3 2 HOI 119 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-hydroxy phenylboronic acid. 'H-NMR (400 MHz, CD 3 0D) 6 9.08 (s, 1H), 8.45 (s, 1H), 7.75 (d, 2H), 7.0 (d, 2H), 4.72 (d, 5 2H), 3.7-3.5 (m, 4H), 3.3 (m, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 299; t,= 1.045 min. Example 97 (General Procedure 1) N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-N-methylamine, 10 tritrifluoroacetate H N

'CH

3 N N H3C N 3 TFA

CH

3 Step 1: [4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]methylcarbamic acid tert butyl ester, trifluoroacetate OH

NN'CH

3 N N HKC N HOC N,.)- TFA 15 CH 3 [4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]methylcarbamic acid tert butyl ester, trifluoroacetic acid was prepared by a similar procedure to that described in Ex ample 59, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and tert butyl-N-methyl-N-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-carbamate. 20 1 H-NMR (400 MHz, CDC1 3 ) 6 8.5 (s, 1H), 8.15 (s, 1H), 7.85 (d, 2H), 7.25 (d, 2H), 3.65 (m, 4H), 3.45 (s, 3H), 2.7 (hept, 1 H), 2.6 (m, 4H), 1.45 (s, 9H), 1.1 (d, 6H). HPLC-MS (Method G): M+1 = 412; t,= 1.60 min. Step 2: 120 [4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]methylcarbamic acid tert butyl ester (0.38 g, 0.92 mmol) was dissolved in DCM (10 mL) and TFA (10 mL) was added. The reaction mixture was stirred at rt for 2 h and then evaporated in vacuo. The solid residue (20 mg) was purified by preparative HPLC Method B. 5 'H-NMR (400 MHz, CDC13) 6 8.5 (s, 1H), 8.2 (s, 1H), 8.0 (brs, 1H), 7.8 (d, 2H), 7.35 (d, 2H), 4.45 (d, 2H), 3.7 (m, 2H), 3.65 (hept, 1H), 3.45 (m, 4H), 3.1 (s, 3H), 3.0 (m, 2H), 1.4 (d, 6H). HPLC-MS (Method G): M+1 = 312; tr= 0.909 min. Example 98 (General Procedure 1) 10 4-Isopropyl-5'-(4-morpholin-4-ylphenyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trihydrochloride N NN

H

3 C N,.) 3 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-morpholino 15 phenylboronic acid. 1 H-NMR (400 MHz, CD 3 OD) 6 8.90 (s, 1H), 8.68 (s, 1H), 8.18 (d, 2H), 8.01 (d, 2H), 4.81-4.75 (m, 2H), 4.20 (m, 4H), 3.80 (m, 4H), 3.76-3.65 (m, 5H), 3.44-3.32 (m, 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 368; t,= 1.021 min. 20 Example 99 (General Procedure I) 5'-1,3-Benzodioxol-5-yl-4-isopropyl-3,4,5,6-tetrahydro-2H-1,2'-bipyrazinyl, dihydrochloride. N 'N H3C N, 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyI and 3,4-methylene 25 dioxyphenylboronic acid.

121 1 H-NMR (400 MHz, CD 3 0D) 6 8.70 (s, 1H), 8.47 (s, 1H), 7.40 (m, 2H), 6.95 (d, 1H), 6.03 (s, 2H), 4.70-4.62 (m, 2H), 3.67-3.57 (m, 3H), 3.42-3.32 (m, 2H), 3.31-3.21 (m, 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 327; t,= 1.115 min. 5 Example 100 (General Procedure 1) 4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-2-methoxyphenylamine, trihydrochloride ,H3

NH

2 N rN t"N HOC HN3 H C I

CH

3 10 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-Bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-amino-3 methoxyphenylboronic acid pinacol ester. 'H-NMR (400 MHz, CD 3 OD) 6 8.80 (s, 1 H), 8.50 (s, 1 H), 7.80 (s, 1 H), 7.65 (d, 1 H), 7.50 (s, 1H), 4.75-4.65 (m, 2H), 4.10 (s, 3H), 3.70-3.60 (m, 3H), 3.55-3.45 (m, 2H), 3.35-3.25 (m, 15 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 328; tr= 0.676 min. Example 101 (General Procedure 1) 2-Chloro-4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-6-methoxyphenol, 20 dihydrochloride ' CH3 OH N N C""N H3C N

CH

3 2HC The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 3-chloro-4 hydroxy-5-methoxyphenylboronic acid.

122 'H-NMR (400 MHz, CD 3 0D) 6 8.85 (s, 1 H), 8.38 (s, 1 H), 7.48 (s, 1 H), 7.43 (s, 1 H), 4.73-4.65 (m, 2H), 4.00 (s, 3H), 3.70-3.60 (m, 3H), 3.58-3.46 (m, 2H), 3.35-3.25 (m, 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 363, rt= 1.066 min. 5 Example 102 (General Procedure I) 5'-(3,4-Dimethoxyphenyl)-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, dihydrochloride ,CH3 O~ 'CH, rN N HO

OH

3 2 HCI The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 3,4-dimethoxy 10 phenylboronic acid. 'H-NMR (400 MHz, CD 3 0D) 6 8.65 (s, 1H), 8.3 (s, 1H), 7.55 (brs, 1H), 7.45 (dd, 1H), 7.05 (dd, 1 H), 4.6 (d, 2H), 3.9 (s, 3H), 3.85 (s, 3H), 3.6 (m, 3H), 3.35 (m, 2H), 3.2 (m, 2H), 1.45 (d, 6H). 13 C-NMR (400 MHz, CD 3 OD) 6 154.38, 151.64, 151.25, 143.61, 140.62, 130.88, 130.66, 15 120.21, 113.47, 111.03, 60.43, 56.92, 48.79, 43.77,17.53. HPLC-MS (Method G): M+1 = 343; t,= 1.051 min. Example 103 (General Procedure 1) 4-Isopropyl-5'-(3,4,5-trimethoxyphenyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, 20 dihydrochloride XOH3 0CH C 3 OH N2HN H 3C YN,, CH, 2 HCI 123 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 3,4,5-tri methoxyphenylboronic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 8.93 (s, 1H), 8.40 (s, 1H), 7.20 (s, 2H), 4.73-4.68 (m, 2H), 5 3.95 (s, 6H), 3.81 (s, 3H), 3.70-3.60 (m, 3H), 3.57-3.47 (m, 2H), 3.35-3.25 (m, 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 373; tr = 1.106 min. Example 104 (General Procedure 1) 10 N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)benzyl]acetamide, dihydrochlo ride 0 N CH3 H N H3C N 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-(N-acetyl 15 aminomethyl)phenylboronic acid. 'H-NMR (400 MHz, CD 3 0D) 6 8.65 (s, 1H), 8.45 (s, 1H), 7.85 (d, 2H), 7.35 (d, 2H), 4.6 (d, 2H), 4.4 (s, 2H), 3.6 (m, 3H), 3.1-3.4 (m, 4H), 2.05 (s, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 354; tr= 0.867 min. 20 Example 105 (General Procedure 1) 4,4"'-Diisopropyl-3,4,5,6,3"',4"',5"',6"'-octahydro-2H,2"'H-[1,2';5',2";5",1 "']quaterpyrazine, ditrifluoroacetate H3 N CH 3 N N) N ' N rNN H3 OH 2 TFA 124 The title compound was isolated as a by-product in Example 104. 'H-NMR (400 MHz, CD 3 0D) 6 8.9 (s, 1H), 8.35 (s, 1H), 4.65 (d, 2H), 3.65 (m, 3H), 3.15-3.4 (m, 5H), 1.4 (d, 6H). 13 C-NMR (400 MHz, CD 3 0D) 6 155.04,141.60,140.50,131.63, 60.40, 48.62, 43.62,17.45. 5 Example 106 (General Procedure 1) 4-Isopropyl-5'-(6-methoxypyridin-3-yl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trifluoroacetate N 'CH 3 N H3C N, TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 10 starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 2-methoxy-5 pyridineboronic acid. 'H NMR (400 MHz, CDCI 3 ) 6 8.75 (dd, 1H), 8.46 (dd, 1H), 8.22 (s, 1H), 8.2 (dd, 1H), 7.42 (brs, 3 H), 6.93 (d, 1H), 4.49 (d, 2 H), 4.08 (s, 3 H), 3.72-3.41 (m, 5H), 3.20-2.79 (m, 2H), 1.39 (d, 6H). 15 "C-NMR (400 MHz, CDCl 3 ) 6 161.82, 150.81, 141.04, 137.90, 136.58, 136.12, 128.39, 124.52,109.14, 56.50, 52.87, 48.49, 45.57, 40.21,14.72. HPLC-MS (Method G): M+1 = 314; tr= 0.965 min. Example 107 (General Procedure 1) 20 N, N-Diisopropyl-4-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzamide, dihydrochloride H3 ' N CH 3

H

3 C

CH

3 N N HOC H3C Y N , ,)2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 1-(5-bromo-pyridin-2-yl)-4-isopropyl-piperazine and 4-((N,N-diisopropylamino) carbonyl)phenylboronic acid.

125 1 H-NMR (400 MHz, CD 3 OD) 6 8.5 (dd, 1H), 8.45 (d, 1H), 7.75 (d, 2H), 7.15 (d, 1H), 7.45 (d, 2H), 4.55 (d, 2H), 3.6-3.9 (m, 7H), 3.4 (t, 2H), 1.55 (m, 6H), 1.45 (d, 6H), 1.15 (m, 6H). HPLC-MS (Method G): M+1 = 409; t, = 1.229 min. 5 Example 108 (General Procedure 1) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyll-(4-methylpiperidin-1 -yl)methanone, dihydrochloride Na N CH N N HGC 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 10 starting from 1-(5-bromo-pyridin-2-yl)-4-isopropyl-piperazine and 4-((4-methylpiperdin-1-yl) carbonyl)phenylboronic acid. 1 H NMR (400 MHz, CDCI 3 ) 6 (d, 1H), 7.75 (dd, 2H), 7.55 (d, 2H), 7.45 (d, 2H), 6.7 (d, 1H), 4.65 (brs, 1H), 3.75 (brs, 1H), 3.6 (t, 4H), 3.0 (brs, 1H), 2.75 (hept, 1H), 2.7 (t, 4H), 1.85-1.6 (m, 3H), 1.4-1.15 (m, 2H), 1.1 (d, 6H), 0.95 (d, 3H). 15 1 3 C-NMR (400 MHz, CDCI 3 ) 6 170.10, 158.82, 147.90, 146.18, 139.50, 135.96, 134.57, 132.00, 128.42, 127.61, 125.91, 125.06, 106.74, 54.64, 54.55, 48.47, 48.37, 48.16, 45.38, 44.88, 42.56, 34.71, 33.87, 31.15, 21.75, 18.50, 18.43. HPLC-MS (Method G): M+1 = 407; t,= 1.20 min. 20 Example 109 (General Procedure 1) 6'-(4-Isopropylpiperazin-1-yl)-6-methoxy-[3,3']bipyridinyl, trifluroacetate O'Zy CH3 N NN N HC NTFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 2-methoxy-5 25 pyridineboronic acid.

126 H-NMR (400 MHz, CD 3 OD) 6 8.5 (d, 1H), 8.37 (m, 2H), 8.15 (d, 1H), 7.55 (d, 1H), 7.05 (d, 1 H), 4.5 (m, 2H), 4.05 (s, 3H), 3.4-3.9 (m, 6H), 1.45 (d, 6H). 13 C-NMR (400 MHz, CD 3 OD) 6 165.51, 154.05, 144.56, 143.82, 140.69, 137.18, 126.29, 125.93, 114.58, 112.86, 60.68, 55.97, 48.93, 45.24, 17.74. 5 Example 110 (General Procedure 1) 4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)benzonitrile, ditrifluoroacetate N N N N H3C NTFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 10 starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-cyanophenyl boronic acid. 1 H-NMR (400 MHz, CD 3 OD) 6 8.75 (s, 1H), 8.45 (s, 1H), 8.1 (d, 2H), 7.75 (d, 2H), 4,7 (m, 2H), 3.6 (m, 3H), 3.2-3.5 (m, 4H), 1.4 (d, 6H). 15 Example 111 (General Procedure 1) 4-Isopropyl-5'-(4-trifluoromethylphenyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trifluoroacetate F F F N N IN H 3C YN,) F

CH

3 TFA The title compound was prepared by a similar procedure to that described in Example 57, 20 starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-(trifluoro methyl)phenylboronic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 8.75 (s, 1H), 8.45 (s, 1H), 8.15 (d, 2H), 7.75 (d, 2H), 4.7 (m, 2H), 3.7-3.55 (m, 3H), 3.4-3.15 (m, 4H), 1.4 (d, 6H). 1 3 C-NMR (400 MHz, CD 3 0D) 6 169.07, 154.98, 142.12, 140.85, 132.28, 127.54, 127.19, 25 60.417, 43.55,17.45.

127 HPLC-MS (Method G): M+1 = 351; t,= 1.523 min. Example 112 (General Procedure 1) 6'-(4-Isopropylpiperazin-1 -yl)-5-trifluoromethyl-[2,3']bipyridinyl, dihydrochloride F F |F N <N N H3C YN 5

CH

3 2 HC The title compound was prepared by a similar procedure to that described in Example 57, starting from 1-[5-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-pyridin-2-yl]-4-isopropyl-piperazine and 2-bromo-5-trifluoromethylpyridine. 'H-NMR (400 MHz, CDCl 3 ) 6 8.85 (d, 1 H), 8.8 (d, 1 H), 8.2 (dd, 1 H), 7.9 (dd, 1 H), 7.7 (d, 1 H), 10 6.65 (d, 1H), 3.65 (m, 4H), 2.75 (hept, 1H), 2.6 (m, 4H), 1.1 (d, 6H). HPLC-MS (Method G): M+1 = 351; tr= 1.203 min. Example 113 (General Procedure 1) 4-lsopropyl-5'-[4-(piperidine-1 -sulfonyl)phenyl]-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, hydro 15 chloride ND N rN N HC N HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-4-isopropyl-3,4,5,6-tetrahydro-2 H-[1,2']bipyrazinyl and 4-(piperidine-1 sulfonyl)phenylboronic acid. 20 'H-NMR (400 MHz, CD 3 0D) 6 8.75 (s,1 H), 8.45 (s, 1 H), 8.18 (d, 2H), 7.82 (d, 2H), 4.75-4.68 (m, 2H), 3.80-3.55 (m, 4H), 3.45-3.22 (m, 4H), 3.00 (m, 4H), 1.68-1.60 (m, 4H), 1.45 (m, 7H). Example 114 (General Procedure 1) 128 4-Isopropyl-5'-(4-(piperidin-1 -yl)phenyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, tri hydrochloride N N N N H1C33 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, 5 starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-(piperindin-1 -yl)phenyl boronic acid. 1 H-NMR (400 MHz, CD 3 OD) 6 8.80 (s,1H), 8.52 (s, 1H), 8.18 (d, 2H), 7.89 (d, 2H), 4.77-4.68 (m, 2H), 3.74-3.60 (m, 7H), 3.58-3.46 (m, 2H), 3.35-3.25 (m, 2H), 2.17-2.08 (m, 4H), 1.90 1.80 (m, 2H), 1.45 (d, 6H). 10 HPLC-MS (Method G): M+1 = 366; t,= 0.798 min. Example 115 (General Procedure 1) [4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-2-methylphenyl]dimethylamine, trihydrochloride YH3 N H 3

CH

3 (N N HCN

OH

3 ,3 HCI 15 C3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 4-(dimethylamino)-3 methylphenylboronic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 8.80 (s, 1H), 8.50 (s, 1H), 8.05 (m, 2H), 7.87 (d, 1H), 4.75 20 4.68 (m, 2H), 3.70-3.58 (m, 3H), 3.54-3.43 (m, 2H), 3.37 (s, 6H), 3.33-3.22 (m, 2H), 2.65 (s, 3H),1.45 (d, 6H). HPLC-MS (Method G): M+1 = 340; tr= 0.718 min. Example 116 (General Procedure 1) 129 5'-(6-Ethoxypyridin-3-yl)-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trihydrochloride rCH 3 N O N N H 3C rN,_

CH

3 3HCI The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 2-ethoxy-5-pyridineboronic 5 acid. 1 H-NMR (400 MHz, CDCl 3 ) 6 8.62 (s, 1H), 8.45 (s, 1H), 8.19 (s, 1H), 8.10 (d, 1H), 6.80 (d, 1 H), 4.40 (q, 4H), 3.65 (m, 4H), 2.75 (m, 1 H), 2.65 (m, 4H), 1.42 (t, 3H), 1.10 (d, 6H). HPLC-MS (Method G): M+1 = 328; t,= 1.122 min. 10 Example 117 (General Procedure 1) 5'-Benzofuran-2-yl-4-isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl, dihydrochloride X\N/ N N N HYC N 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 2-benzofuranboronic acid. 15 'H-NMR (400 MHz, DMSO-d) 6 8.70 (s, 1H), 8.55 (s, 1H), 7.70-7.60 (m, 2H), 7.47 (s, 1H), 7.46-7.25 (m, 2H), 4.63-4.55 (m, 2H), 3.60-3.45 (m, 5H), 3.18-3.06 (m, 2H), 1.32 (d, 6H). HPLC-MS (Method G): M+1 = 323; tr= 1.354 min. Example 118 (General Procedure 1) 20 5-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1 ,2']bipyrazinyl-5'-yl)thiophene-2-carbonitrile, ditrifluoro acetate 130 N f N NN

CH

3 2 TFA The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyraziny and 5-cyano-2-thiophene boronic acid. 5 1 H-NMR (400 MHz, CD 3 0D) 6 8.70 (s, 1H), 8.33 (s, 1H), 7.72 (d, 1H), 7.61 (d, 1H), 4.75-4.65 (m, 2H), 3.70-3.55 (m, 3H), 3.40-3.20 (m, 4H), 1.42 (d, 6H). HPLC-MS (Method G): M+1 = 314; tr= 1.147 min. Example 119 (General Procedure 1) 10 4-Isopropyl-5'-(2-methylpyridin-4-yl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trihydrochloride N CH 3 N N HOC N

CH

3 3 HCI The title compound was prepared by a similar procedure to that described in Example 57, starting from 5-bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl and 2-methyl-4-pyridineboronic acid. 15 1 H-NMR (400 MHz, CD 3 0D) 6 9.05 (s, 1H), 8.65 (d, 1H), 8.60 (s, 1H), 8.50 (s, 1H), 8.45 (d, 1 H), 4.90-4.82 (m, 2H), 3.70-3.50 (m, 5H), 3.35-3.24 (m, 2H), 2.83 (s, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 298; tr= 0.413 min. Example 120 (General Procedure 1) 20 (R)-2-(6-1,3-Benzodioxol-5-ylpyridazin-3-yl)octahydropyrido[1,2-a]pyrazine, dihydrochloride ~0 O O N N'N N 2 HCI 131 The title compound was prepared by a similar procedure to that described in Example 57, starting from (R)-2-(6-chloropyridazin-3-yl)octahydropyrido[1,2-a]pyrazine and 3,4 methylenedioxyphenylboronic acid. 'H-NMR (400 MHz, CD 3 0D) 6 8.45 (brs, 1H), 8.20 (brs, 1H), 7.50 (d, 1H), 7.47 (s, 1H), 7.10 5 (d, 1 H), 6.15 (s, 2H), 4.75-4.55 (m, 2H), 3.80-3.30 (m, 6H), 3.20-3.05 (m, 1 H), 2.15-1.92 (m, 4H), 1.85-1.65 (m, 2H). HPLC-MS (Method G): M+1 = 339; t,= 0.827 min. Example 121 (General Procedure 1) 10 4-Isopropyl-5'-(5-trifluoromethyl-pyridin-2-yl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, trifluoroacetate F F |F N N I TN A H3C YN,) A

CH

3 5-Bromo-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl (0.50 g, 1.75 mmol) was dissolved in dry THF and cooled to -780C under an atmosphere of nitrogen. A 1.6 N solution of n-butyl lithium 15 in hexanes (0.124 g, 1.93 mmol) was added keeping the temperature below -604C. Tributyltin chloride (0.628 g, 1.93 mmol) was added and the reaction mixture was allowed to reach rt. The reaction mixture was transferred to a 5 mL microwave vial and 2-bromo-5-trifluromethyl pyridine (0.33 g, 1.93 mmol), triphenylphosphinpalladium(II)dichloride (0.088 g, 0.0615 mmol), caesium fluoride (0.581 g, 3.85 mmol) and TEA (0.389 g, 0.385 mmol) were added. 20 This reaction mixture was heated 1.6 h at 100 C in a microwave oven. The reaction mixture was evaporated in vacuo and the oily residue was purified on a silica gel column with DCM/MeOH (9:1) as eluent. The product isolated was treated with HCI in diethyl ether fol lowed by evaporation. This afforded 49 mg (9 %) of the title compound. HPLC-MS (Method G): M+1 = 352; tr= 1.29 min. 25 Example 122 (General Procedure 1) N-{4-[6-(4-Cyclobutylpiperazin-1 -yl)pyridin-3-yl]phenyl}acetamide, trifluoroacetate 132 H NYCH3 .N N TFA The title compound was prepared by a similar procedure to that described in Example 59, starting from 1-(5-bromo-pyridin-2-yl)-4-cyclobutyl-piperazine and 4-acetamidophenylboronic acid. 5 'H-NMR (400 MHz, DMSO-d) 6 8.48 (d, 1 H), 7.92 (dd, 1 H), 7.65 (d, 2H), 7.55 (d, 2H), 7.05 (d, 1 H), 4.5 (d, 2H), 3.75 (pent, 1 H), 3.45 (d, 2H), 3.15 (m, 2H), 2.9 (m, 2H), 2,2 (m, 4H), 2.05 (s, 3H), 1.75 (m, 2H). HPLC-MS (Method G): M+1 = 351; tr= 0.74 min. 10 Example 123 (General Procedure 1) 4-[6-(4-Cyclobutyl-piperazin-1-yl)-pyridin-3-yl]-N,N-dimethyl-benzamide, trifluoroacetate 0 N'CH 3 CH3 'N N N,, TFA The title compound was prepared by a similar procedure to that described in Example 57, starting from 1-(5-bromo-pyridin-2-yl)-4-cyclobutyl-piperazine and 4-(dimethylaminocarbonyl) 15 phenylboronic acid. 'H-NMR (400 MHz, CD 3 0D) 6 8.45 (d, 1H), 8.1 (dd, 1H), 7.65 (d, 2H), 7.5 (dd, 2H), 7.18 (d, 1 H), 3.2-4.5 (m, 8H), 3.1 (s, 3H), 3.0 (s, 3H), 2.3 (m, 4H), 1.8-1.95 (m, 2H). HPLC-MS (Method G): M+1 = 365; tr = 0.931 min. 20 Example 124 (General Procedure 1) N-{4-[6-(4-Cyclobutylpiperazin-1-yl)pyridazin-3-yl]-2-methoxyphenyl}acetamide, dihydrochlo ride O' CH 3 H N CH 3 N N' N _ 2 HCI The title compound was prepared by a similar procedure to that described in Example 57, starting from 3-chloro-6-(4-cyclobutyl-piperazin-1 -yl)-pyridazine and N-[2-methoxy-4-(4,4,5,5 tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]acetamide. 5 'H-NMR (400 MHz, CD 3 OD) 6 8.57 (d, 1H), 8.42 (d, 1H), 8.20 (d, 1H), 7.62 (s, 1H), 7.54 (d, 1H), 4.70-4.60 (m, 2H), 4.05 (s, 3H), 3.86-3.75 (m, 1H), 3.74-3.60 (m, 4H), 3.20-3.10 (m, 2H), 2.50-2.32 (m, 4H), 2.23 (s, 3H), 2.00-1.81 (m, 2H). HPLC-MS (Method G): M+1 = 382; tr= 0.787 min. 10 Example 125 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroace tate N H C TFA

CH

3 Step 1: 15 4-[6-(4-Isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzonitrile ON N N

CH

3 To a solution of 4-(6-chloro-pyridazin-3-yl)-benzonitrile (20 g, 92.8 mmol) in 1-butanol (150 mL) was added 1 -isopropyl-piperazine hydrochloride (29.8 g, 148.5 mmol) and NH 4 CI (4.96 g, 92.8 mmol). The reaction mixture was heated at reflux for 48 h and then concentrated un 20 der reduced pressure. The residue was dissolved into a 10% solution of citric acid in water 134 and filtered. Solid K 2

CO

3 was added to the filtrate until pH 9. The precipitate was isolated and washed with water to give 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzonitrile (20 g, 70%). 5 Step 2: 4-[6-(4-Isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride COOH !N N N H3C N, HCI

CH

3 4-[6-(4-Isopropyl-piperazin-1-y)-pyridazin-3-yl]-benzonitrile (10 g, 32.6 mmol) was dissolved in 6 N hydrochloric acid (100 mL). The reaction mixture was heated at reflux for 6 h and con 10 centrated under reduced pressure to give 10.3 g (79 %) 4-[6-(4-isopropyl-piperazin-1-yl) pyridazin-3-yl]-benzoic acid, hydrochloride. Step 3: To a solution of 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride (2 15 g, 5 mmol) in CH 2 Cl 2 was added EDAC (1.91 g, 10 mmol) and HOBt (0.81 g, 6 mmol) fol lowed by piperidine (2.56 g, 30 mmol). The reaction mixture was stirred for 60 h at rt and then concentrated under reduced pressure. The residue was purified by column chromatog raphy eluting with CH 2

C

2 on silica gel to give a crude product, which was further purified by HPLC (Method F) to give 850 mg (43 %) of the title compound as a TFA salt. 20 'H NMR (300 MHz, D 2 0) 6 8.25 (d, 1H), 7.90 (d, 1H), 7.84 (d, 2H), 7.50 (d, 2H), 4.51-4.48 (m, 2H), 3.59-3.42 (m, 7H), 3.40-3.16 (m, 4H), 1.57-1.49 (m, 4H), 1.45-1.34 (m, 2H), 1.34 (d, 6H). HPLC (Method D): tr = 2.94 min (98 %). 25 Example 126 (General Procedure J) (4-[6-(4-Cyclopropylmethylpiperazin-1 -yl)pyridazin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroacetate 0 No "'N N'N N TFA The title compound was prepared by a similar procedure to that described in Example 125 starting from 4-[6-(4-cyclopropylmethyl-piperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydro chloride and piperidine. 5 1 H NMR (300 MHz, CDCl3) 6 8.24 (d, 1H), 7.91-7.81 (m, 3H), 7.48 (d, 2H), 4.48-4.43 (m, 2H), 3.76-3.69 (m, 2H), 3.53-3.43 (m, 4H), 3.30-3.09 (m, 4H), 3.02 (d, 2H), 1.53-1.39 (m, 6H), 1.07-0.92 (m, 1 H), 0.63 (d, 2H), 0.27 (d, 2H). HPLC (Method D): t, = 3.04 min (98 %). 10 Example 127 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1-yl)pyridazin-3-yl]phenyl}morpholin-4-ylmethanone, trifluoroace tate 0 N K~ -N rN N.N H3C N N TFA

CH

3 To a solution of 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride 15 (2 g, 5 mmol) in CH 2 0 2 was added EDAC (1.91 g, 10 mmol) and HOBt (0.81 g, 6 mmol). Then morpholine (2.61 g, 30 mmol) was added. The reaction mixture was stirred for 60 h at rt and concentrated under reduced pressure. The residue was purified by column chromatog raphy on silica gel to give the product, which was further purified by HPLC Method F. This afforded 600 mg (30 %) of the title compound as a TFA salt. 20 'H NMR (300 MHz, D20) 6 8.26 (d, 1H), 7.91 (d, 1H), 7.84 (d, 2H), 7.53 (d, 2H), 4.56-4.46 (m, 2H), 3.76-3.63 (m, 4H), 3.57-3.41 (m, 7H), 3.36-3.35 (m, 2H), 3.22-3.14 (m, 2H), 1.20 (d, 6H). HPLC (Method E): tr = 2.28 min (95 %). 25 Example 128 (General Procedure J) 13b (4-Hydroxymethylpiperidin-1 -yl)-{4-[6-(4-isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl) methanone, trifluoroacetate N OH N NN

H

3 C N N TFA

CH

3 To a solution of 4-[6-(4-isopropylpiperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride 5 (2.0 g, 5.0 mmol) in CH 2 Cl 2 was added EDAC (1.91 g, 10 mmol) and HOBt (0.81 g, 6 mmol). Then a solution of 4-hydroxymethyl-piperidine (2.56 g, 30 mmol) in CH 2 Cl 2 (10 ml) was added. The mixture was stirred for 60 h at rt and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel eluting with CH 2

CI

2 to give a crude product, which was further purified by HPLC Method F. This afforded 580 mg (28 %) of 10 the title compound as a TFA salt. HPLC (Method D): t, = 2.32 min (95 %). Example 129 (General Procedure J) 4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate 0 OH N'CH 3

CH

3 N N N 3N , TFA 15 CH 3 To a solution of 4-[6-(4-isopropylpiperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride (2 g, 5 mmol) in CH 2 Cl 2 was added EDAC (1.91 g, 10 mmol), HOBt (0.81 g, 6 mmol) and TEA (4.04 g, 40 mmol). Then dimethylamine, hydrochloride (1.63 g, 20 mmol) was added. The reaction mixture was stirred for 60 h at rt and concentrated under reduced pressure. The 20 residue was purified by column chromatography on silica gel eluting with CH 2

CI

2 to give a crude product, which was further purified by HPLC Method F. This afforded 800 mg (45 %) of the title compound as a TFA salt. 'H NMR (300 MHz, D 2 0) 6 8.26 (d, 1H), 7.90 (d, 1H), 7.82 (d, 2H), 7.50 (d, 2H), 4.56-4.47 (m, 2H), 3.57-3.40 (m, 5H), 3.22-3.09 (m, 2H), 2.96 (m, 3H), 2.85 (m, 3H), 1.23 (d, 6H).

lit HPLC (Method E): t, = 2.25 min (97 %). Example 130 (General Procedure J) {4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridazin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroace 5 tate 0 N N fN ,N NI TFA To a solution of 4-[6-(4-cyclopentyl-piperazin-1 -yl)-pyridazin-3-yl]-benzoic acid, hydrochloride (2 g, 5 mmol) in CH 2 Cl 2 was added EDAC (1.91 g, 10 mmol), HOBt (0.81 g, 6 mmol). Then piperidine (2.52 g, 30 mmol) was added. The reaction mixture was stirred for 60 h at rt and 10 concentrated under reduced pressure. The residue was purified by column chromatography on silica gel eluting with CH 2 Cl 2 to give crude product, which was further purified by HPLC Method F to give 600 mg (29 %) of the title compound as a TFA salt. 1 H NMR (300 MHz, D 2 0) 5 8.18 (d, 1H), 7.80-7.83 (m, 3H), 7.47 (d, 2H), 4.44 (m, 2H), 3.1 3.7 (m, 11H), 2.03 (m, 2H), 1.39-1.64 (m, 12H). 15 HPLC (Method D): t, = 3.27 min (95 %). Example 131 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}-(4-methylpiperazin-1 -yl)methanone, trifluoroacetate 0 N ON'CH N N N HC N TFA 20 CH3 To a solution of 4-[6-(4-isopropylpiperazin-1-yl)pyridazin-3-yl]benzoic acid, hydrochloride (2 g, 5 mmol) in CH 2

CI

2 was added EDAC (1.91 g, 10 mmol) and HOBt (0.81 g, 6 mmol). Then 1 -methyl-piperazine (2.0 g, 20 mmol) was added. The reaction mixture was stirred for 60 h at rt and concentrated under reduced pressure. The residue was purified by column chromatoglid raphy eluting with CH 2

CI

2 on silica gel to give crude product, which was further purified by HPLC Method F. This afforded 300 mg (15 %) of the title compound as a TFA salt. 'H NMR (300 MHz, D 2 0) 6 8.01 (d, 1H), 7.85 (d, 2H), 7.59-7.49 (m, 3H), 4.47-4.43 (m, 2H), 3.90-3.84 (m, 1 H), 3.50-3.05 (m, 14H), 2.81 (m, 3H), 1.23 (d, 6H). 5 HPLC (Method D): t, = 3.04 min (96 %). Example 132 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyllmorpholin-4-ylmethanone, trifluoroacetate N I00 N N HC NI) TFA

CH

3 10 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and morpholine. 'H NMR (300 MHz, D 2 0) 6 8.27 (dd, J=2.4 Hz, J=9.6 Hz, 1H) 8.20 (d, J=2.4 Hz, 1H), 7.62 (d, J=8.4 Hz, 2H), 7.44 (d, J=8.1 Hz, 2H), 7.32 (d, J=9.6 Hz, 1H), 4.34-4.30 (m, 2H), 3.73-3.50 15 (m, 11 H), 3.46-3.41 (m, 2H), 3.25 (m, 2H), 1.29 (d, J=6.6 Hz, 6H). HPLC (Method D): tr = 3.75 min (93 %). Example 133 (General Procedure J) 4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate 0 OH N'CH 3 C' H 3 N N HsC YN TFA 20 CH 3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and dimethylamine, hydrochloride.

'H NMR (300 MHz, D 2 0) 6 8.28 (dd, J = 2.1 Hz, J = 9.3 Hz, 1 H), 8.20 (d, J = 2.1 Hz, 1 H), 7.6 (d, J = 8.4 Hz, 2H), 7.44 (d, J = 8.1 Hz, 2H), 7.33 (d, J = 9.3 Hz, 1 H), 4.35-4.30 (m, 2H), 3.64-3.51 (m, 5H), 3.29-3.26 (m, 2H), 3.02 (s, 3H), 2.91 (s, 3H), 1.23 (d, J = 7.2 Hz, 6H). HPLC (Method D): tr = 3.73 min (96 %). 5 Example 134 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl)piperidin-1 -ylmethanone, trifluoroacetate N N H3C N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 125, 10 starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and piperidine. 1 H NMR (300 MHz, D 2 0) 6 8.29 (dd, J=2.4 Hz, J=9.6 Hz, 1H), 8.15 (d, J=1.8 Hz, 1H), 7.58 (d, J=8.7 Hz, 2H), 7.38 (d, J=8.7 Hz, 2H), 7.34 (d, J=9.6 Hz, 1H), 4.32-4.27 (m, 2H), 3.62 3.48 (m, 7H), 3.28-3.19 (m, 4H), 1.53 (m, 4H), 1.38 (m, 2H), 1.26 (d, J=6.6 Hz, 6H). 15 HPLC (Method D): tr = 4.43 min (95 %). Example 135 (General Procedure J) (4-Hydroxymethylpiperidin-1 -yl)-(4-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl} methanone, trifluoroacetate NOOH KN N H3C YN TFA 20 CH 3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and 4 hydroxymethyl-piperidine. 'H NMR (300 MHz, D 2 0) 5 8.29 (dd, J=2.4 Hz, J=9.6 Hz, 1H), 8.22 (d, J= 2.1 Hz, 1H), 7.64 25 (d, J=8.4 Hz, 2H), 7.43 (d, J=8.4 Hz, 2H), 7.34 (d, J=9.6 Hz, 1H), 4.45-4.32 (m, 3H), 3.65- 14U 3.51 (m, 6H), 3.4-3.38 (m, 2H), 3.30-3.27 (m, 2H), 3.11-3.07 (m, 1 H), 2.90-2.85 (m, 1 H), 1.80-1.76 (m, 1H), 1.29 (d, J=6.6 Hz, 6H), 1.19-1.09 (m, 2H). HPLC (Method D): t, = 3.79 min (97 %). 5 Example 136 (General Procedure J) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}-(4-methylpiperazin-1 -yl)methanone, trifluoroacetate 0 N NCH3 N N H3C N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 125, 10 starting from 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridin-3-yl]-benzoic acid, hydrochloride and 1 methylpiperazine. 1 H NMR (300 MHz, D 2 0) 6 8.29 (dd, J=2.4, J=9.6 Hz, 1H), 8.16 (d, J= 2.4 Hz, 1H), 7.61 (d, J=8.4 Hz, 2H), 7.45 (d, J=8.4 Hz, 2H), 7.34 (d, J=9.3 Hz, 1H), 4.32-4.27 (m, 2H), 3.92-3.84 (m, 1 H), 3.61-3.44 (m, 8H), 3.32-3.01 (m, 6H), 2.80 (s, 3H), 1.24 (d, J=6.6 Hz, 6H). 15 Example 137 (General Procedure J) {4-[6-(4-Cyclopropylmethylpiperazin-1 -yl)pyridin-3-yl]phenyl)piperidin-1 -ylmethanone, trifluoroacetate 0 No N N N,,N TFA 20 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-(cyclopropylmethyl)-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochlo ride and piperidine. 'H NMR (300 MHz, D 2 0) 6 8.45 (d, 1H), 8.08 (d, 1H), 7.68 (d, 2H), 7.47 (d, 2H), 7.16 (d, 1H), 4.72-3.34 (m, 12H), 3.12 (d, 2H), 1.77-1.49 (m, 6H), 1.22-1.11 (m, 1H), 0.80 (q, 2H), 0.47 (q, 25 2H).

HPLC (Method E): t, = 3.39 min (96 %). Example 138 (General Procedure J) {4-[6-(4-Cyclopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroace 5 tate No rN N N,, TFA The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-cyclopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and piperidine. 10 'H NMR (300 MHz, CD 3 0D) 6 8.38-8.28 (m, 2H), 7.73 (d, 2H), 7.51 (d, 2H), 7.46-7.41 (m, 1H), 4.03-3.95 (m, 2H), 3.78-3.55 (m, 6H), 3.51-3.35 (m, 4H), 2.93-2.96 (m, 1H), 1.79-1.48 (m, 7H), 1.06-1.04 (m,3 H). HPLC (Method D): tr = 4.43 min (96 %). 15 Example 139 (General Procedure J) {4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroace tate 0 N0 'N N <y~l"')TFA The title compound was prepared by a similar procedure to that described in Example 125, 20 starting from 4-[6-(4-cyclopentyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and piperidine. 'H NMR (300 MHz, CD 3 0D) 6 8.46 (d, 1H), 8.06 (dd, 1H), 7.68 (d, 2H), 7.47 (d, 2H), 7.13 (dd, 1H), 4.70-4.09 (m, 2H), 4.09-3.35 (m, 1OH), 3.35-3.28 (m, 1H), 2.35-2.23 (m, 2H), 1.95 1.55 (m, 12H). 25 HPLC (Method E): tr = 3.46 min (98 %).

142 Example 140 (General Procedure J) {3-[6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}morpholin-4-ylmethanone, trifluoroacetate 0 N N

H

3 C Y N TFA

CH

3 5 The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-isopropyl-piperazin-1 -yl)-pyridin-3-yl]-benzoic acid and morpholine. 'H NMR (300 MHz, D 2 0) 6 8.23 (s, 1H), 8.15 (d, 1H), 7.55-7.52 (t, 2H), 7.37 (d, 1H), 7.66 7.21 (d, 1H), 4.36-4.26 (m, 2H), 3.78-3.40 (m, 13H), 3.30-3.17 (s, 2H), 1.29 (d, 6H). HPLC (Method C): tr = 3.95 min (96 %). 10 Example 141 (General Procedure J) {3-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}piperidin-1 -ylmethanone, trifluoroacetate A AND N N HC* N, TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 125, 15 starting from 3-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid and piperidine. 'H NMR (300 MHz, D 2 0) 6 8.31 (d, 1H), 8.17 (s, 1H), 7.64 (d, 2H), 7.52 (t, 2H), 7.37 (d, 2H), 3.65-3.55 (m, 7H), 3.34 (d, 2H), 3.29 (t, 4H), 1.60-1.42 (d, 6H), 1.29 (d, 6H). HPLC (Method D): t, = 4.03 min (97 %). 20 Example 142 (General Procedure J) 3-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]-N, N-dimethylbenzamide, trifluoroacetate 143 N NH 3 HN N 0 TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid and dimethylamine, hydrochloride. 5 1 H NMR (300 MHz, D 2 0) 6 8.26 (d, 2H), 8.20 (s, 1H), 7.56-7.51 (dd, 2H), 7.65 (d, 1H), 7.41 7.33 (dd, 2H), 4.33 (d, 2H), 3.64-3.54 (m, 5H), 3.29 (t, 2H), 3.02 (s, 3H), 2.92 (s, 3H), 1.29 (d, 6H). HPLC (Method D): tr = 2.52 min (97 %). 10 Example 143 (General Procedure J) {4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridin-3-yl]phenyl}-(4-methylpiperazin-1 -yl)methanone, trifluoroacetate 0 |N-' NCH3 N N $NN TFA The title compound was prepared by a similar procedure to that described in Example 125, 15 starting from 3-[6-(4-cyclopentyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and 1 -methylpiperazine. 1 H NMR (300 MHz, CD 3 OD) 6 8.41-8.32 (m, 2H), 7.77 (d, 2H), 7.62 (d, 2H), 7.47 (d, 1H), 4.62-4.21 (m, 2H), 4.01-3.35 (m, 11H), 3.25-3.05 (m, 2H), 3.05-2.78 (m, 3H), 2.52-2.12 (m, 2H), 2.12-1.98 (m, 4H), 1.98-1.51 (m, 6H). 20 HPLC (Method C): tr = 4.29 min (96 %). Example 144 (General Procedure J) {4-[6-(4-Cyclopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}-(4-methylpiperazin-1 -yl)methanone, trifluoroacetate 144 0 N NCH3 rN N N TFA The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-cyclopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and 1 -methylpiperazine. 5 'H NMR (300 MHz, CD 3 0D) 6 8.41 (s, 1H), 8.12-8.15 (m, 1H), 7.73 (d, 2H), 7.58 (d, 2H), 7.21-7.24 (m, 1H), 4.03-3.95 (m, 5H), 3.78-3.31 (m, 9H), 3.09-3.30 (m, 2H), 2.84-2.96 (m, 4H), 0.92-1.14 (m, 4H). HPLC (Method D): tr = 4.43 min (96 %). 10 Example 145 (General Procedure J) (4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]phenyl}-(4-methoxymethylpiperidin-1 -yl) methanone, trifluoroacetate N N N N CH3 H 3C Y N I-1)T FA CH3 The title compound was prepared by a similar procedure to that described in Example 125, 15 starting from 3-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzoic acid, hydrochloride and 4 methoxymethyl-piperidine, hydrochloride. 1 H NMR (300 MHz, CD 3 0D) 6 8.45 (d, 1H), 8.10 (dd, 1H), 7.70 (d, 2H), 7.48 (d, 2H), 7.16 (d, 1H), 4.72-4.45 (m, 2H), 4.22-3.35 (m, 8H), 3.32 (s, 3H), 3.29-3.27 (m, 2H), 3.21-2.95 (m, 2H), 2.95-2.75 (m, 1H), 1.95-1.82 (m, 2H), 1.75-1.62 (m, 1H), 1.42 (d, 6H), 1.41-1.15 (m, 20 2H). HPLC (Method D): tr = 4.34 min (97 %). Example 146 (General Procedure J) 4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate 145 0 i" CH 3 N N Nl TFA The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-cyclopentyl-piperazin-1 -yl)-pyridin-3-yl]-benzoic acid and dimethylamine. 'H NMR (300 MHz, CD 3 0D) 6 8.50 (s, 1H), 8.00 (dd, 1H) 7.68 (d, 2H), 7.50 (d, 2H), 7.05 (d, 5 1H), 4.75-4.50 (m, 2H), 3.85-3.45 (m, 4H), 3.25-3.17 (m, 3H), 3.15-3.02 (m, 6H), 2.33-2.15 (m, 2H), 1.90-1.65 (m, 6H).HPLC (Method D): tr = 4.83 min (97 %). Example 147 (General Procedure J) {4-[6-(4-Cyclopentylpiperazin-1 -yl)pyridin-3-yl]phenyl}morpholin-4-ylmethanone, trifluoroace 10 tate 0 N -j0 rN N TFA The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-cyclopentyl-piperazin-1 -yl)-pyridin-3-yl]-benzoic acid and morpholine. 1 H NMR (300 MHz, CD 3 0D) 6 8.50 (s, 1 H), 8.05 (d, 1 H) 7.68 (d, 2H), 7.50 (d, 2H), 7.10 (d, 1 H), 15 4.80-3.30 (m, 17H), 2.30-2.15 (m, 2H), 1.90-1.55 (m, 6H). HPLC (Method D): tr = 4.77 min (96 %). Example 148 (General Procedure J) 3-[6-(4-isopropylpiperazin-1 -yl)-4-methylpyridin-3-y]-N,N-dimethylbenzamide, trifluoroacetate NHH3 HOC NN 20 C 146 The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-isopropyl-piperazin-1-yl)-4-methyl-pyridin-3-yl]-benzoic acid and di methylamine, hydrochloride. 1 H NMR (300 MHz, CD 3 OD) 6 7.98 (s, 1H), 7.58 (t, 1H), 7.48 (t, 2H), 7.41 (s, 1H), 7.20 (s, 1H), 4.81-3.35 (m, 9H), 3.12 (s, 3H), 3.04 (s, 3H), 2.36 (s, 3H), 5 1.42 (d, 6H). HPLC (Method D): t, = 3.95 min (97 %). Example 149 (General Procedure J) 3-[6-(4- Isopropylpiperazin-1 -yl)-5-methylpyridin-3-yl]-N, N-dimethylbenzamide, trifluoroacetate 9H 3 N' CH3 N /O H3C N) CH, 10 CH 3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 3-[6-(4-isopropyl-piperazin-1-yl)-5-methyl-pyridin-3-yl]-benzoic acid and di methylamine, hydrochloride. 1 H NMR (300 MHz, CD 3 OD) 6 8.42 (s, 1H), 7.97 (s, 1H), 7.73 (d, 1H), 7.67 (s, 1H), 7.56 (t, 1H), 7.43 (d, 1H), 3.88-3.70 (m, 2H), 3.70-3.51 (m, 3H), 3.47 15 3.32 (m, 3H), 3.28-3.15 (m, 4H), 3.03 (s, 3H), 2.42 (s, 3H), 1.43 (d, 6H). HPLC (Method D): tr = 4.14 min (98 %). Example 150 (General Procedure J) 4-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate 0 N CH 3 C' H N

H

3 C N,) CH3 TFA 20 CH 3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-5-methyl-pyridin-3-yl]-benzoic acid and di methylamine, hydrochloride. 'H NMR (300 MHz, CD 3 OD) 6 8.43 (d, 1H), 8.01 (d, 1H), 7.72 (d, 2H), 7.53 (d, 2H), 3.91-3.72 (m, 2H), 3.70-3.51 (m, 3H), 3.47-3.32 (m, 3H), 3.21-3.09 (m, 25 4H), 3.04 (s, 3H), 2.38 (s, 3H), 1.43 (d, 6H).

147 HPLC (Method D): t, = 4.11 min (95 %). Example 151 (General Procedure J) 4-[6-(4-Isopropylpiperazin-1 -yl)-4-methylpyridin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate N'CH3 CH3 $N CH 3 H3C N TFA 5 CH The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-4-methyl-pyridin-3-yl]-benzoic acid and di methylamine, hydrochloride. 1 H NMR (300 MHz, CD 3 OD) 6 7.95 (s, 1H), 7.55 (d, 2H), 7.47 (d, 2H), 7.35 (s, 1H), 4.73-3.35 (m, 9H), 3.13 (s, 3H), 3.04 (s, 3H), 2.39 (s, 3H), 1.42 (d, 6H). 10 HPLC (Method D): tr = 3.93 min (98 %). Example 152 (General Procedure J) 4-[4-Isopropyl-6-(4-isopropylpiperazin-1 -yl)pyridazin-3-yl]-N,N-dimethylbenzamide, trifluoroacetate

H

3 C CH NCH 7 NN ,N HOC CH TFA 15 CH3 The title compound was prepared by a similar procedure to that described in Example 125, starting from 4-[4-isopropyl-6-(4-isopropylpiperazin-1-yl)-pyridazin-3-yl]-benzoic acid and di methylamine, hydrochloride. 'H NMR (400 MHz, CD 3 OD) 6 7.87 (s, 1H), 7.67 (t, 4H), 4.90-3.31 (m, 9H), 3.15 (s, 3H), 20 3.08-3.05 (m, 4H), 1.44 (d, 6H), 1.27 (d, 6H). HPLC (Method D): tr = 3.46 min (99 %). Example 153 (General Procedure K) 148 1-Cyclopropylmethyl-4-[5-(4-piperidin-1-ylmethylphenyl)pyridin-2-yl]piperazine, trifluoroace tate NC N N INTFA 5 Step 1: 4-[6-(4-Cylopropylmethyl-piperazin-1 -yl)-pyridin-3-yl]-benzonitrile CN N N N, 1-Cyclopropylmethyl-piperazine (13 g, 94 mmol) was mixed with 4-(6-cloro-pyridin-3-y) benzonitrile (5 g, 23 mmol). The mixture was heated at 140 0 C for 1.5 hours. The mixture 10 was cooled to rt and purified by column chromatography (EtOAc : petrolether = 1:1) on silica gel to give 2.7 g (43 %) of 4-[6-(4-cylopropylmethyl-piperazin-1 -yl)-pyridin-3-yl]-benzonitrile. Step 2: 4-[6-(4-Cyclopropylmethyl-piperazin-1 -yl)-pyridin-3-y]-benzaldehyde CHO N N NN 15 To a solution of 4-[6-(4-cylopropylmethyl-piperazin-1-yl)-pyridin-3-yl]-benzonitrile (2.0 g , 6.3 mmol) dissolved in THF (40 mL) was added DIBAL-H (25 mL, 1 N) at -400C. The mixture was stirred 2 h at -40 0 C and then CH 3 0H (15 mL), water (100 mL) and 1 N NaOH (15 mL) was added at - 40 0 C. The mixture was extracted with EtOAc (3 x 300 mL). The combined organic 20 extracts were washed with water (3 x 50mL), dried (Na 2

SO

4 ) and concentrated under re duced pressure to give 1.7 g (51 %) of 4-[6-(4-cyclopropylmethyl-piperazin-1 -yl)-pyridin-3-yl] benzaldehyde. Step 3: 149 To a solution of 4-[6-(4-cyclopropylmethyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde (1.7 g, 3.18 mmol) dissolved in THF (15 mL) was added water (0.05 mL), piperidine (0.33 g, 3.8 mmol), acetic acid (0.01 mL) and NaCNBH 3 (400 mg, 6.4 mmol). The mixture was stirred overnight at 600C and concentrated to give a crude product, which was further purified by 5 HPLC Method F to give 540 mg (26 %) of the title compound as a TFA salt. 1 H NMR (300 MHz, D 2 0) 6 8.28 (d, 1H), 8.20 (d, 1H), 7.56(d, 2H), 7.45 (d, 2H), 7.31 (d, 1H), 4.27-4.21 (m, 2H), 4.13 (m, 2H), 3.77-3.72 (m, 2H), 3.59-3.51 (m, 2H), 3.20-3.13 (m, 4H), 3.00 (d, 2H), 2.82-2.75 (m, 2H), 1.77-1.42 (m, 5H), 1.29-1.25 (m, 1H), 1.00-0.95 (m, 1H), 0.62-0.58 (m, 2H), 0.26-0.24 (m, 2H). 10 HPLC (Method D): tr = 3.76 min (96 %). Example 154 (General Procedure K) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl}dimethylamine, trifluoroacetate N CH H N CHC 15 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde and dimethylamine, hydrochloride. 'H NMR (300 MHz, D 2 0) 6 8.30 (d, 1H), 8.26 (d, 1H), 7.62 (d, 2H), 7.48 (d, 2H), 7.33 (d, 1H), 4.33-4.29 (m, 2H), 4.23 (m, 2H), 3.62-3.48 (m, 5H), 3.28-3.15 (m, 2H), 2.73 (s, 6H), 1.26 (d, 20 6H). HPLC (Method D): tr = 2.69 min (98 %). Example 155 (General Procedure K) 3-(4-Cyclopentylpiperazin-1 -yl)-6-(4-piperidin-1 -ylmethylphenyl)pyridazine, trifluoroacetate TNo N N 25

A

150 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-cyclopentyl-piperazin-1 -yl)-pyridazin-3-yl]-benzaldehyde and piperidine. 'H NMR (300 MHz, D20) 6 8.06 (d, J=9.9 Hz, 1H), 7.80 (d, J=8.1 Hz, 2H), 7.67 (d, J=9.6 Hz, 1H), 7.50 (d, J=8.4 Hz, 2H), 4.44-4.38 (m, 2H), 4.18 (m, 2H), 3.65-3.61 (m, 2H), 3.51-3.30 5 (m, 5H), 3.16-3.07 (m, 2H), 2.85-2.78 (m, 2H), 2.03-1.96 (m, 2H), 1.77-1.73 (m, 2H), 1.61 1.52 (m, 9H), 1.34-4.22 (m, 1 H). HPLC (Method D): t, = 3.69 min (86 %). Example 156 (General Procedure K) 10 1-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl}-4-methylpiperazine, trifluoroacetate N NNH H 3C N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde and 1-methyl piperazine. 15 1 H NMR (300 MHz, D 2 0) 6 8.33 (d, 1 H), 8.30 (d, 1 H), 7.66 (d, 2H), 7.53 (d, 2H), 7.35 (d, 1 H), 4.57-4.31 (m, 4H), 3.65-3.53 (m, 13H), 3.31-3.23 (m, 2H), 2.90 (s, 3H), 1.28 (d, 6H). HPLC (Method C): t, = 2.59 min (93 %). Example 157 (General Procedure K) 20 (1-{4-[6-(4-Isopropylpiperazin-1-yl)pyridin-3-yl]benzyl}piperidin-4-yl)methanol, trifluoroacetate -~ N N OH H3 C N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde and 4-hydroxy methylpiperidine.

151 'H NMR (300 MHz, D 2 0) 5 8.32 (d, 1H), 8.18 (d, 1H), 7.61 (d, 2H), 7.48 (d, 2H), 7.35 (d, 1H), 4.34-4.29 (m, 2H), 4.21 (m , 2H), 3.62-3.22 (m, 11 H), 2.94-2.86 (m, 2H), 1.87-1.67 (m, 3H), 1.29-1.25 (m, 8H). HPLC (Method C): t, = 2.82 min (97 %). 5 Example 158 (General Procedure K) 1 -Isopropyl-4-[5-(4-piperidin-1 -ylmethylphenyl)pyridin-2-yl]piperazine, trifluoroacetate N N N H3C N.~ TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, 10 starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridin-3-yl]-benzaldehyde and piperidine. 'H NMR (300 MHz, D 2 0) 5 8.27 (d, 1H), 8.16 (d, 1H), 7.59 (d, 2H), 7.45 (d, 2H), 7.31 (d, 1 H), 4.31-4.26 (m, 2H), 4.17 (m, 2H), 3.56-3.45 (m, 4H), 3.31-3.17 (m, 4H), 2.84-2.76 (m, 2H), 1.82-1.44 (m, 6H), 1.24 (d, 6H). HPLC (Method D): t, = 4.45 min (87 %). 15 Example 159 (General Procedure K) {4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]benzyl}dimethylamine, trifluoroacetate N CH 3 H N N H 3C N,)TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, 20 starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridazin-3-yl]-benzaldehyde and dimethyl amine, hydrochloride. 1 H NMR (300 MHz, CD 3 OD) 6 8.13-8.06 (m, 3 H), 7.67-7.61 (m, 3 H), 4.38(s, 2 H), 3.89-3.32 (m, 6 H), 2.88 (s, 6 H), 1.41 (d, 6 H). HPLC (Method C): tr = 3.79 min (96 %). 25 Example 160 (General Procedure K) 152 3-(4-Isopropylpiperazin-1 -yl)-6-(4-piperidin-1 -ylmethylphenyl)pyridazine, trifluoroacetate #NQ N N H3C N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzaldehyde and piperidine. 5 1 H NMR (300 MHz, CD 3 OD) 5 8.12-8.05 (m, 3H), 7.67-7.60 (m, 3H), 4.35 (s, 2H), 3.89-3.35 (m, 8H), 2.98 (t, 2H), 1.95-1.64 (m, 5H), 1.62-1.48 (m, 1 H), 1.41 (d, 6H). Example 161 (General Procedure K) 3-(4-Isopropylpiperazin-1 -yl)-6-[4-(4-methylpiperazin-1 -ylmethyl)phenyl]pyridazine, 10 trifluoroacetate NNCH3 Nj N HC N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridazin-3-yl]-benzaldehyde and 1-methyl piperazine. 15 1 H NMR (300 MHz, CD 3 0D) 6 8.19 (d, 1H), 7.98 (d, 1H), 7.76 (d, 1H), 7.62 (d, 1H), 4.01 (s, 2H), 3.78-3.32 (m, 10H), 3.19-3.02 (m, 4H), 2.90 (s, 3H), 1.95-1.64 (m, 5H), 1.62-1.48 (m, 1 H), 1.41 (d, 6H). HPLC (Method C): tr = 3.74 min (97 %). 20 Example 162 (General Procedure K) (1-{4-[6-(4-Isopropylpiperazin-1-yl)pyridazin-3-yl]benzyl}piperidin-4-yl)methanol, trifluoroace tate 153 ~ -N OH N N HN H3C N, TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1-yl)-pyridazin-3-yl]-benzaldehyde and 4-hydroxy methylpiperidine. 5 'H NMR (300 MHz, CD 3 0D) 6 8.05-8.11 (m, 3 H), 7.58-7.67 (m, 3 H), 4.36 (s, 2 H), 3.78-3.38 (m, 10 H), 2.99-3.12 (m, 4 H), 1.46-2.05 (m, 5 H), 1.41 (d, 6 H). HPLC (Method C): t, = 3.94 min (96 %). Example 163 (General Procedure K) 10 4-{4-[6-(4-Isopropylpiperazin-1-yl)pyridazin-3-yl]benzyl}morpholine, trifluoroacetate N N H3C N T FA

CH

3 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzaldehyde and morpholine. 'H NMR (300 MHz, CD 3 0D) 6 8.12-8.06 (m, 3 H), 7.70-7.59 (m, 3 H), 4.43 (s, 2 H), 4.33-3.23 15 (m, 14 H), 1.41 (d, 6 H). Example 164 (General Procedure K) 1 -Cyclopentyl-4-[5-(4-piperidin-1 -ylmethylphenyl)pyridin-2-yl]piperazine, trifluoroacetate NNo N N TFA 20 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-cyclopentyl-piperazin-1 -yl)-pyridin-3-yl]-benzaldehyde and piperidine.

154 'H NMR (300 MHz, D 2 0) 6 8.26-8.22 (m, 2H), 7.62 (d, 2H), 7.47 (d, 2H), 7.27 (d, 1H), 4.27 (d, 2H), 4.20 (s, 2H), 3.71 (d, 2H), 3.55-3.42 (m, 3H), 3.36 (d, 2H), 3.20 (t, 2H), 2.86 (t, 2H), 2.08 (d, 2H), 1.85-1.51 (m, 11H), 1.41-1.30 (m, 1H). HPLC (Method D): t, = 2.43 min (98 %). 5 Example 165 (General Procedure K) 1 -Cyclopropyl-4-[5-(4-piperidin-1 -ylmethylphenyl)pyridin-2-yl]piperazine, trifluoroacetate ~No N N The title compound was prepared by a similar procedure to that described in Example 153, 10 starting from 4-[6-(4-cyclopropyl-piperazin-1 -yl)-pyridin-3-yl-benzaldehyde and piperidine. 1 H NMR (300 MHz, CD 3 OD) 6 8.46 (s, 1H), 8.05 (d, 1H), 7.71 (d, 2H), 7.57 (d, 2H), 7.18-7.13 (m, 1H), 4.87 (s, 2H), 4.18-3.72 (m, 4H), 3.65-3.35 (m, 6H), 3.08-2.82 (m, 3H), 1.99-1.62 (m, 5H), 1.39-1.61 (m, 1 H), 1.05-1.15 (m, 2H), 1.05-0.89 (m, 2H). HPLC (Method C): tr = 4.43 min (99 %). 15 Example 166 (General Procedure K) 3-(4-Cyclopropylmethylpiperazin-1-yl)-6-(4-piperidin-1-ylmethylphenyl)pyridazine, trifluoro acetate N N AKN TFA 20 The title compound was prepared by a similar procedure to that described in Example 153, starting from 4-[6-(4-cyclopropylmethyl-piperazin-1-yl)-pyridazin-3-yl]-benzaldehyde and piperidine. 1 H NMR (300 MHz, CD 3 OD) 6 8.24 (d, 1H), 8.08 (d, 2H) 7.80 (d, 1H), 7.70 (d, 2H), 4.89-2.85 (m, 12H), 3.22-2.92 (m, 4H), 2.05-1.89 (m, 2H), 1.89-1.75 (m, 3H), 1.65-1.45 (m, 1H), 1.25 25 1.06 (m, 1 H), 0.83-0.78 (m, 2H), 0.52-0.40 (m, 2H). HPLC (Method D): tr = 3.04 min (98 %).

155 Example 167 (General Procedure K) 3-(4-Cyclopropylpiperazin-1 -yl)-6-(4-piperidin-1 -ylmethylphenyl)pyridazine, trifluoroacetate 'NN Nd TFA The title compound was prepared by a similar procedure to that described in Example 153, 5 starting from 4-[6-(4-cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzaldehyde and piperidine. 1 H NMR (300 MHz, CDCI): 6 12.00 (s, 1H), 8.08 (d, 2H), 7.81 (d, 1H) 7.62 (d, 2H), 7.15 (d, 1H), 4.25-4.00 (m, 4H), 3.65-3.40 (m, 5H), 2.85-2.40 (m, 6H), 2.15-1.95 (m, 3H), 1.95-1.85 (m, 3H), 1.52-1.31 (m, 2H), 0.91 (d, 2H). HPLC (Method D): tr = 4.01 min (96 %). 10 Example 168 (General Procedure K) 4-{4-[2-(4-Cyclopropylpiperazin-1 -yl)pyrimidin-5-yl]benzyl}morpholine, dihydrochloride NO N N N, 2 HCI The title compound was prepared by a similar procedure to that described in Example 153, 15 starting from 4-[2-(4-cyclopropyl-piperazin-1-yl)-pyrimidin-5-yl]-benzaldehyde and mor pholine. 1H NMR (300 MHz, DMSO-d) 6 11.6 (brs, 1 H), 11.3 (brs, 1 H), 8.85 (s, 2H), 7.81-7.71 (m, 4H), 4.82-4.69 (m, 2H), 4.40-4.30 (m, 2H), 4.00-3.77 (m, 4H), 3.61-3.42 (m, 4H), 3.34-3.00 (m, 6H), 2.92-2.79 (m, 1H), 1.25-1.15 (m, 2H), 0.86-0.77 (m, 2H). 20 HPLC (Method Rx): t, = 3.88 min (98 %). Example 169 (General Procedure L) N-{3-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}acetamide, trifluoroacetate 156 N HN H HCNN H3C TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 170, starting from 3-[6-(4-isopropyl-piperazin-1-yl)-pyridazin-3-yl]-phenylamine and acetylchloride. 'H NMR (300 MHz, DMSO-d 6 ) 6 10.08 (s, 1H), 9.78 (s, 1H), 8.33 (s, 1H), 7.97 (d, 1H), 7.62 5 (t, 2H), 7.53 (d, 1H), 7.40 (t, 1H), 4.60 (d, 2H), 3.61-3.50 (m, 3H), 3.34-3.25 (m, 2H), 3.16 3.13 (m, 2H), 2.05 (s, 3H), 1.28 (d, 6H). HPLC (Method D): t, = 2.28 min (96 %). Example 170 (General Procedure L) 10 N-{3-[6-(4-Cyclopropylpiperazin-1 -yl)pyridazin-3-yl]phenyllacetamide N N CH3 Z~NNN H N,) Step 1: 3-(4-Cyclopropyl-piperazin-1 -yl)-6-(3-nitro-phenyl)-pyridazine N0

INO

2 N N'N N,) 15 To a solution of 3-chloro-6-(3-nitro-phenyl)-pyridazine (10.0 g, 424 mmol) in n-BuOH (150 mL) was added 1-cyclopropyl-piperazine (8.55 g, 678 mmol) and NH 4 CI (2.27 g, 424 mmol) and the mixture was stirred for 48 h at 800C. The solvent was removed under reduced pres sure, and the residue was diluted with water. After alkalization with ammonia, the mixture was extracted with ethyl acetate. The extract was dried (Na 2

SO

4 ) and concentrated to give 20 7.2 g of crude 3-(4-cyclopropyl-piperazin-1 -yl)-6-(3-nitro-phenyl)-pyridazine.

157 'H NMR (300 MHz, DMSO-d 6 ) 6 8.85 (s, 1 H), 8.45 (d, 1 H), 8.22 (d, 1 H), 8.11 (d, 1 H), 7.89 7.66 (m, 1 H), 7.39 (d, 1 H), 3.69-3.65 (m, 4H), 2.80-2.76 (m, 4H), 1.78-1.65 (m, 1 H), 0.54 0.38 (m, 4H). 5 Step 2: 3-[6-(4-Cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenylamine

NH

2 N N A solution of 3-(4-cyclopropyl-piperazin-1 -yl)-6-(3-nitro-phenyl)-pyridazine (3.60 g, 11 mmol) in ethanol (18 mL) was added to water (30 mL) and powdered Fe (1.86 g, 33 mmol). The 10 mixture was stirred for 3 h at 80 0 C. The resulting mixture was filtered and the filtrate was ex tracted with CH 2 Cl 2 . The organic phase was washed with brine, dried (Na 2

SO

4 ) and concen trated to give 2.32 g (71 %) of 3-[6-(4-cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenylamine. Step 3: 15 To a solution of 3-[6-(4-cyclopropyl-piperazin-1-yl)-pyridazin-3-yl]-phenylamine (400 mg, 1.36 mmol) in CH 2 0 2 (25 mL) was added triethylamine (275 mg, 2.72 mmol). Then acetyl chloride (171 mg, 2.18 mmol) was added dropwise and the resulting mixture was stirred overnight at rt. The reaction was quenched with water (15 mL) and the phases were separated. The or ganic phase was washed with brine, dried (Na 2

SO

4 ) and concentrated to give a crude prod 20 uct, which was recrystallized from MeOH. This afforded 201 mg (48 %) of the title com pound. 'H NMR (300 MHz, CD 3 0D) 6 8.09 (s, 1H), 7.82 (d, 1H), 7.66-7.62 (m, 2H), 7.44-7.39 (m, 1H), 7.33 (d, 1H), 3.69-3.65 (m, 4H), 2.80-2.76 (m, 4H), 2.15 (s, 3H), 1.74-1.71 (m, 1H), 0.54-0.49 (m, 4H). 25 HPLC (Method D): t, = 2.82 min (95 %). Example 171 (General Procedure L) Cyclopropanecarboxylic acid {3-[6-(4-cyclopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}amide 158 N N'NQ ~N v' N The title compound was prepared by a similar procedure to that described in Example 170, starting from 3-[6-(4-cyclopropyl-piperazin-1-yl)-pyridazin-3-yl]-phenylamine and cyclo propanecarbonyl chloride. 1 H NMR (300 MHz, CD 3 0D) 6 8.08 (d, 1 H), 7.82 (d, 1 H), 7.66-7.62 5 (m, 2H), 7.44-7.39 (m, 1 H), 7.33 (d, 1 H), 3.69-3.65 (m, 4H), 2.80-2.77 (m, 4H), 1.79-1.71 (m, 2H), 0.97-0.94 (m, 2H), 0.89-0.85 (m, 2H), 0.55-0.49 (m, 4H). HPLC (Method D): tr = 3.18 min (97 %). Example 172 (General Procedure L) 10 N-{4-[6-(4-Cyclopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}acetamide, trifluoroacetate H NN O v'N NLV TFA The title compound was prepared by a similar procedure to that described in Example 170, starting from 4-[6-(4-cyclopropyl-piperazin-1-yl)-pyridazin-3-yI]-phenylamine and acetyl chlo ride.

1 H NMR (300 MHz, CD 3 0D) 6 8.31 (d, 1H), 7.96-7.88 (m, 3H), 7.81 (d, 2H), 4.20-3.95 15 (m, 4H), 3.70-3.58 (m, 4H), 2.94-2.86 (m, 1H), 2.16 (s, 3H), 1.14-0.96 (m, 4H). HPLC (Method D): tr = 2.74 min (98 %). Example 173 (General Procedure L) Cyclopropanecarboxylic acid {4-[6-(4-cyclopropylpiperazin-1 -yl)pyridazin-3-yl]phenyllamide H N NO 20 20 159 The title compound was prepared by a similar procedure to that described in Example 170, starting from 4-[6-(4-cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenylamine and cyclopro panecarbonyl chloride.'H NMR (300 MHz, DMSO-d) 6 10.30 (s, 1H), 7.93 (d, 2H), 7.86 (d, 1 H), 7.67 (d, 2H), 7.30 (d, 1 H), 3.57-3.54 (m, 4H), 2.64-2.62 (m, 4H), 1.79-1.74 (m, 1 H), 5 1.65-1.62 (m, 1 H), 0.78 (d, 4H), 0.43-0.41 (m, 2H), 0.35-0.30 (m, 2H). HPLC (Method D): tr = 2.52 min (93 %). Example 174 (General Procedure L) Cyclopropanecarboxylic acid {4-[6-(4-cyclopropylperhydro-1,4-diazepin-1 -yl)pyridazin-3-yl] 10 phenyllamide, dihydrochloride H N 'S 0 rIN NN N~ 2 HCI The title compound was prepared by a similar procedure to that described in Example 176, starting from 4-[6-(4-Isopropyl-perhydro-1 ,4-diazepin-1 -yl)-pyridazin-3-yli]-phenylamine and cyclopropanecarboxylic acid. 15 'H NMR (400 MHz, CD 3 OD) 6 8.44 (d, 1H), 8.03 (d, 1H), 7.94 (m, 2H), 7.85 (m, 2H), 4.22 (broad m, 2H), 3.89 (t, 2H), 3.71 (broad m, 4H), 3.30 (m, 1H), 2.48 (broad m, 2H), 1.82 (m, 1 H), 1.22 (m, 2H), 1.00 (m, 4H), 0.91 (m, 2H). HPLC-MS (Method G): M+1 = 378; tr= 0.96 min. 20 Example 175 (General Procedure L) N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-2,2-dimethylpropion amide, hydrochloride H HAC CH3 N CH3 NP 0 NN HOC

H

3 Y HCI

CH

3 160 The title compound was prepared by a similar procedure to that described in Example 176, starting from 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenylamineand tert butylcarboxylic acid. HPLC-MS (Method G): M+1 = 382; tr= 1.23 min. 5 Example 176 (General Procedure L) Tetrahydropyran-4-carboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5' yl)phenyl]amide, dihydrochloride H N N YO 0 N N HCN Y N2 HCI

OH

3 10 A mixture of tetrahydro-2H-pyran-4-carboxylic acid (0.313 g, 2.19 mmol), HOBt (0.368 g, 2.40 mmol), EDAC (0.46 g, 2.40 mmol) and TEA (0.243 g, 2.40 mmol) in DMF (5mL) was stirred at rt for 5 min. A solution of 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5' yl)phenylamine (0.65 g, 2.19 mmol) in DMF (5 mL) was added. The reaction mixture was stirred for an additional 48 h. The reaction mixture was purified by preparative HPLC Method 15 B to give 240 mg of a TFA salt. The TFA salt was dissolved in MeOH and HCI in diethyl ether was added. Evaporation of the volatiles in vacuo afforded 186 mg (18 %) of the title com pound. 'H-NMR (400 MHz, CD 3 0D) 6 8.90 (s, 1 H), 8.49 (s, 1 H), 7.95 (d, 2H), 7.70 (d, 2H), 4.55-4.45 (m, 2H), 3.95-3.87 (m, 2H), 3.55-3.45 (m, 5H), 3.40-3.30 (m, 2H), 3.15-3.05 (m, 2H), 2.70 20 2.60 (m, 1H), 1.75-1.60 (m, 4H), 1.30 (d, 6H). HPLC-MS (Method G): M+1 = 410; tr = 1.037 min. Example 177 (General Procedure L) N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-N-methylacetamide, di 25 hydrochloride 161 H3 N O N CH 3 NN

H

3 C N 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 170, starting from N-[4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-N-methyl amine and acetic acid anhydride. 5 'H-NMR (400 MHz, CD 3 OD) 6 8.95 (s, 1H), 8.60 (s, 1H), 8.04 (d, 2H), 7.35 (d, 2H), 4.80-4.72 (m, 2H), 3.73-3.62 (m, 5H), 3.40-3.28 (m, 5H), 1.95 (brs, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 354; t,= 1.27 min. Example 178 (General Procedure L) 10 Cyclopropanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl) phenyl]methylamide, dihydrochloride CH3 N$ NO N N

CH

3 2HCI The title compound was prepared by a similar procedure to that described in Example 176, starting from N-[4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]-N-methyl 15 amine and cyclopropanecarboxylic acid. 1 H-NMR (400 MHz, CD 3 0D) 6 8.90 (s, 1H), 8.55 (s, 1H), 8.05 (d, 2H), 7.55 (d, 2H), 4.80-4.70 (m, 2H), 3.72-3.55 (m, 5H), 3.40-3.25 (m, 5H), 1.57-1.50 (m, 1 H), 1.45 (d, 6H), 0.95 (m, 2H), 0.72 (m, 2H). HPLC-MS (Method G): M+1 = 380; tr= 1.10 min. 20 Example 179 (General Procedure L) N-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yi)-2-methoxyphenyl]acetamide, dihydrochloride 162

-CH

3 H N O N CH3 <N N HCN 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 170, starting from 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-2-methoxyphenyl amine and acetic acid anhydride. 5 'H-NMR (400 MHz, CD 3 OD) 6 8.75 (s, 1 H), 8.40 (s, 1H), 8.15 (d, 1H), 7.60 (s, 1H), 7.45 (d, 1 H), 4.72-4.65 (m, 2H), 4.00 (s, 3H), 3.68-3.58 (m, 3H), 3.40-3.22 (m, 4H), 2.20 (s, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 370; t,= 1.004 min. 10 Example 180 (General Procedure L) Cyclohexanecarboxylic acid [4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl) phenyl]amide, hydrochloride H N O N N HC N HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 176, 15 starting from cyclohexylcarboxylic acid and 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2'] bipyrazinyl-5'-yl)phenylamine. HPLC-MS (Method G): M+1 = 408; tr= 1.34 min. Example 181 (General Procedure M) 20 2-[4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenoxy]-N,N-dimethylacet amide, dihydrochloride 163 0 0 NCH3 N

CH

3 N N H3CN H N 2HCI

CH

3 4-(4-Isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenol (0.15 g, 0.404 mmol) was dissolved in DMF (4 mL) in a 5 mL microwave vial. NaH (0.039 g, 1.62 mmol) was added slowly and the mixture was stirred at rt for 30 min. Chloro-N,N-dimethylacetamide (0.147 g, 5 1.21 mmol) was added and the reaction mixture was heated for 2.5 h at 1300C in a microwave oven. The reaction mixture was evaporated in vacuo and the residue was redissolved in a mixture of DCM and water. The phases were separated and the aqueous phase was extracted with DCM (2 x 25 mL). The combined organic extracts were evaporated, redissolved in MeOH and purified by preparative HPLC Method B. This afforded 10 an oil which was treated with HCI in diethyl ether to give a solid material. Recrystallization from acetone and MeOH afforded 75 mg (41 %) of the title compound. 'H-NMR (400 MHz, CD 3 0D) 6 8.75 (s, 1H ), 8.35 (s, 1H), 7.85 (d, 2H), 7.1 (d, 2H), 4.65 (d, 2H), 3.65 (m, 3H), 3.2-3.5 (m, 6H), 3.1 (s, 3H), 2.95 (s, 3H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 384; tr= 0.995 min. 15 Example 182 (General Procedure N) 5'-[4-(1,1 -Dioxoisothiazolidin-2-yl)phenyl]-4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl, dihydrochloride N 0 N H C N OH 3 2 HCI CH3 20 A mixture of 4-(4-isopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenylamine (0.34 g, 1.14 mmol), 3-chloro-1-propanesulfonyl chloride (0.20 g, 1.14 mmol) and TEA (0.12 g, 1.14 mmol) in DMF was stirred at rt for 1 h. NaH (0.055 g, 2.29 mmol) was added and stirring was continued for 5 h. The reaction mixture was transferred to a microwave vial (20 mL) and heated for 1000 s at 80 0 C in a microwave oven. The reaction mixture was evaporated in 164 vacuo and redissolved in a mixture of DCM and water. The phases were separated and the aqueoues phase was extracted with DCM (2 x 25 mL). The combined organic extracts were evaporated in vacuo, redissolved in MeOH and purified by preparative HPLC Method B. This afforded 220 mg of a solid which was redissolved in MeOH and treated with HCI in diethyl 5 ether. The volatiles were evaporated to give 126 mg (22 %) of the title compound. 'H-NMR (400 MHz, CD 3 0D) 6 9.05 (s, 1H), 8.5 (s, 1H), 7.86 (d, 2H), 7.4 (d, 2H), 4.75 (d, 2H), 3.85 (t, 2H), 3.65 (m, 7H), 3.5 (t, 2H), 2.55 (m, 2H), 1.45 (d, 6H). HPLC-MS (Method G): M+1 = 402; t,= 1.114 min. 10 Example 183 (General Procedure A) 6-(4-Isopropylpiperazin-1 -yl)-[3,3']bipyridinyl, trifluoroacetate N I-I N N HCY N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -isopropylpiperazine and 6-chloro-[3,3']bipyridinyl. 15 'H NMR (300 MHz, CD 3 0D) 6 1.25 (d, 6 H), 2.19 (t, 2 H), 3.40-3.59 (m, 5 H), 4.37 (d, 2 H), 7.26 (d, 1H), 8.01 (t, 1H), 8.19 (d, 1H), 8.34 (s, 1H), 8.71-8.64 (m, 2H), 8.93 (s, 1H). HPLC (Method D): tr = 2.51 min (98 %). Example 184 (General Procedure A) 20 6-(4-Isopropylpiperazin-1-yl)-[3,4']bipyridinyl, trifluoroacetate N N N HC N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1-isopropylpiperazine and 6-chloro-[3,4']bipyridinyl. 'H NMR (300 MHz, D 2 0) 5 1.09 (d, 6H), 3.15 (t, 2H), 3.36 (t, 2H), 3. 56-3.46 (m, 3H), 4.57 (d, 25 2H), 7.10 (d, 1H), 8.16 (dd, 3H), 8.58 (d, 3H). HPLC (Method D): tr = 2.53 min (99 %).

165 Example 185 (General Procedure A) 6'-(4-Isopropylpiperazin-1 -yl)-[2,3']bipyridinyl, trifluoroacetate N N N H3C N,) TFA

CH

3 5 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -isopropylpiperazine and 6'-chloro-[2,3']bipyridinyl. 'H NMR (300 MHz, D 2 0) 6 8.75-8.63 (m, 2H), 8.58-8.47 (m, 1H), 8.28-15 (m, 2H), 7.87 (t, J=6.3, 7.2 Hz, 1H), 7.17 (d, J=9.3 Hz, 1H), 4.61 (d, J=14.1 Hz, 2H), 3.75-3.52 (m, 3H), 3.44 3.53 (m, 2H), 3.20-3.43 (m, 2H), 1.39 (d, J=6.9 Hz, 6H). 10 HPLC (Method C): tr = 2.45 min (97 %). Example 186 (General Procedure A) 6'-(4-Ethylpiperazin-1 -yl)-[2,3']bipyridinyl N N N,,

CH

3 15 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -ethylpiperazine and 6'-chloro-[2,3']bipyridinyl. 1 H NMR (300 MHz, D 2 0) 6 8.70 (d, J=2.1 Hz, 1H), 8.54 (d, J=4.2 Hz, 1H), 8.13 (dd, J=9.0, 2.7 Hz, 1H), 7.90-7.70 (m, 2H), 7.35-7.24 (m, 1H), 6.92 (d, J=9 Hz, 1H), 3.66 (t, J=5.1 Hz, 4H), 2.63 (t, J=5.1 Hz, 4H), 2.52 (q, J=7.2 Hz, 2H), 1.16 (t, J=7.2 Hz, 3H). 20 HPLC (Method C): t, = 2.23 min (97 %). Example 187 (General Procedure A) 6'-(4-Isopropylpiperazin-1-yl)-6-methyl-[2,3']bipyridinyl, trifluoroacetate 166 N

CH

3 N N HOC N)

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -isopropyl-piperazine and 6'-chloro-6-methyl-[2,3']bipyridinyl. 'H NMR (300 MHz, D 2 0) 6 8.44 (d, 1H), 8.26 (t, 1H), 8.01 (dd, 1H), 7.83 (d, 1H), 7.60 (d, 5 1 H), 7.05 (d, 1 H), 4.45 (d, 2H), 3.60-3.40 (m, 3H), 3.31 (t, 2H), 3.13 (t, 2H), 2.67 (s, 3H), 1.25 (d, 6H). HPLC (Method C): tr = 2.70 min (100 %). Example 188 (General Procedure A) 10 6'-(4-Ethylpiperazin-1 -yl)-6-methyl-[2,3']bipyridinyl N

CH

3 N N N

CH

3 The title compound was prepared by a similar procedure to that described in Example 1, starting from 1 -ethyl-piperazine and 6'-chloro-6-methyl-[2,3']bipyridinyl. 'H NMR (300 MHz, CD 3 OD) 6 8.66 (d, 1H), 8.11 (dd, 1H), 7.70 (t, 1H), 7.51 (d, 1H), 7.14 (d, 15 1H), 6.90 (d, 1H), 3.63 (d, 4H), 2.65-2.40 (m, 9H), 1.15 (t, 3H). HPLC (Method C): t, = 2.42 min (98 %). Example 189 (General Procedure A) 2-[6-(4-isopropylpiperazin-1-yl)pyridin-3-yl]quinoline, trifluoroacetate N HO N~% HC N- TFA 20 CH 3 167 The title compound was prepared by a similar procedure to that described in Example 1, starting from 2-(6-chloro-pyridin-3-yl)-quinoline and 1 -isopropyl-piperazine. 'H NMR (300 MHz, CD 3 OD) 6 8.87 (s, 1H), 8.40-8.25 (m, 2H), 8.04 (d, 1H), 7.95-7.85 (m, 2H), 7.80-7.60 (m, 1H), 7.58-7.48 (m, 1H), 6.96 (d, 1H), 3.67 (t, 4H), 2.80-2.65 (m, 5H), 1.13 5 (d, 6H). HPLC (Method D): tr = 3.40 min (97 %). Example 190 (General Procedure A) N-{3-[6-(4-Isopropylpiperazin-1 -yl)-4-methylpyridazin-3-yl]phenyl}acetamide, trifluoroacetate

OH

3 N N N CH3 H3C N, 10

CH

3 TFA Step 1: N-[3-(6-Chloro-5-methyl-pyridazin-3-yl)-phenyl]-acetamide and N-[3-(6-chloro-4-methyl pyridazin-3-yl)phenyl]acetamide HOI 2'adH 3 N H3C NH NH Cl N 0 CH 3 Cl N N 0 CH 3 15 A solution of 3-acetamidophenylboronic acid (6.6 g, 37 mmol), 3,6-dichloro-4-methyl pyridazine (5 g, 31 mmol) and Pd(PPh 3

)

4 (3.5 g, 3 mmol) in DMF (180 mL, degassed) was stirred at rt for 1 h. Then sodium carbonate (12.3 g in 45 mL water, degassed) was added. The mixture was heated with stirring at 800C overnight. The mixture was filtered and the fil 20 trate was concentrated under reduced pressure. The residue was diluted with EtOAc (100 mL), washed with brine, dried over sodium sulfate and concentrated. The residue was puri fied by column chromatography on silica gel (EtOAc/petroleum ether = 1:1) to give 3 g (38 %) of a mixture of N-[3-(6-chloro-5-methyl-pyridazin-3-yl)-phenyl]-acetamide and N-[3-(6-chloro 4-methyl-pyridazin-3-yl)-phenyl]-acetamide, which was used directly in the next step. 25 Step 2: The mixture of isomers (1.5 g, 5.9 mmol) from the previous step and 1-isopropyl-piperazine (3.7 g, 28.5 mmol) was heated at 2000C under a nitrogen atmosphere for 1 h. The mixture 168 was cooled to rt and diluted with dichloromethane (30 mL). The mixture was washed with brine, dried (sodium sulfate) and concentrated to give a crude product, which was purified by preparative HPLC Method F to give 358 mg (11 %) of N-{3-[6-(4-isopropyl-piperazin-1 -yl)-4 methyl-pyridazin-3-yl]-phenyl}-acetamide and 195 mg (6 %) of N-{3-[6-(4-isopropyl-piperazin 5 1 -yl)-5-methyl-pyridazin-3-yl]-phenyl}-acetamide as the TFA salts. N-{3-[6-(4-isopropyl-piperazin-1-yl)-4-methyl-pyridazin-3-yl]-phenyl}-acetamide, trifluoroace tate: 'H NMR (300 MHz, D20) 6 7.90 (s, 1 H), 7.76 (d, 1 H), 7.63-7.55 (m, 2H), 7.43-7.35 (m, 1 H), 4.61 (dd, 2H), 3.72-3.56 (m, 3H), 3.56-3.45 (m, 2H), 3.35-3.20 (m, 2H), 2.42 (s, 3H), 2.17 (s, 10 3H), 1.37 (d, 6H). HPLC (Method D): tr = 2.85 min (96 %). Example 191 (General Procedure A) N-{3-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridazin-3-yl]phenyl}acetamide, trifluoroacetate H3C 1 NH N N 0 CH 3 H3C N,) 15 CH3 TFA The title compound was prepared as described in Example 195. 'H NMR (300 MHz, D20) 6 8.23 (s, 1H), 7.98 (t, 1H), 7.68-7.55 (m, 3H), 4.12-3.98 (m, 2H), 3.70-3.54 (m, 3H), 3.50-3.30 (m, 4H), 2.58 (s, 3H), 2.18 (s, 3H), 1.39 (d, 6H). HPLC (Method D): tr = 3.30 min (97 %). 20 Example 192 (General Procedure A) 3-[6-(4-Isopropylpiperazin-1-yl)-4-methylpyridazin-3-yl]-N,N-dimethylbenzamide, trifluoroace tate

H

3

-

H N N 0 HC N

CH

3 TFA 25 Step 1: 169 3-(6-Chloro-5-methyl-pyridazin-3-yl)-N, N-dimethyl-benzamide and 3-(6-chloro-4-methyl pyridazin-3-yl)-N, N-dimethyl-benzamide Q1-1 CH3 / H3 HC

NH

3 and N' CH 3 -NN 0 CI N O Cl NN A solution of N,N-dimethylbenzamide-3-boronic acid (7 g, 36.5 mmol), 3,6-dichloro-4-methyl 5 pyridazine (5 g, 30.5 mmol) and Pd(PPh 3

)

4 (1.7 g, 1.5 mmol) in DMF (180 mL, degassed) was stirred at rt for 1 h. Then sodium carbonate (12.1 g in 45 mL water, degassed) was added and the mixture was heated with stirring at 800C overnight. The mixture was filtered and the filtrate was concentrated under reduced pressure. The residue was diluted with EtOAc (100 mL), washed with brine, dried (sodium sulfate) and concentrated to give a crude 10 product, which was purified by column chromatography on silica gel (EtOAc/petroleum ether = 1:1). This afforded 2.8 g (32 %) of a mixture of 3-(6-chloro-5-methyl-pyridazin-3-yl)-N,N dimethyl-benzamide and 3-(6-chloro-4-methyl-pyridazin-3-yl)-N,N-dimethyl-benzamide, which was used directly in the next step. 15 Step 2: The mixture of isomers (1.5 g, 5.9 mmol) from the previous step and 1 -isopropyl-piperazine (3.7 g, 28.5 mmol) was heated at 2000C under a nitrogen atmosphere for 1 h. The mixture was cooled to rt and diluted with dichloromethane (30 mL). The mixture was washed with brine, dried (sodium sulfate) and concentrated to give a crude product, which was purified by 20 preparative HPLC Method F to give 185 mg (6 %) 3-[6-(4-isopropyl-piperazin-1 -yl)-4-methyl pyridazin-3-yl]-N,N-dimethyl-benzamide and 373 mg (12 %) of 3-[6-(4-isopropyl-piperazin-1 yl)-5-methyl-pyridazin-3-yl]-N,N-dimethyl-benzamide as the TFA salts. 3-[6-(4-isopropyl-piperazin-1 -yl)-4-methyl-pyridazin-3-yl]-N,N-dimethyl-benzamide, 25 trifluoroacetate: 'H NMR (400 MHz, D 2 0) 6 7.83 (s, 1H), 7.69-7.56 (m, 3H), 7.56 (s, 1H), 4.53 (d, 2H), 3.63 3.50 (m, 3H), 3.50-3.39 (m, 2H), 3.30-3.15 (m, 2H), 3.01 (s, 3H), 2.92 (s, 3H), 2.33 (s, 3H), 1.29 (d, 6H). HPLC (Method D): tr = 3.02 min (99 %). 30 Example 193 (General Procedure A) 3-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridazin-3-yl]-N,N-dimethylbenzamide, trifluoro acetate 170 H 3

H

3 C N C X N 0 HO N

CH

3 TEA The title compound was prepared as described in Example 197. 'H NMR (400 MHz, D 2 0) 6 8.24 (s, 1 H), 7.90 (d, 1 H), 7.81 (s, 1 H), 7.70-7.58 (m, 2H), 4.02 (d, 2H), 3.63-3.48 (m, 3H), 3.48-3.27 (m, 4H), 3.03 (s, 3H), 2.92 (s, 3H), 2.53 (s, 3H), 1.31 (d, 5 6H). HPLC (Method D): tr = 3.49 min (98 %). Example 194 (General Procedure A) 4-[6-(4-Isopropylpiperazin-1-yl)-4-methylpyridazin-3-yl]-N, N-dinethylbenzamide, trifluoro 10 acetate H -'CH 3 CH3 HN N NN N CN N O H3C N TFA

CH

3 Step 1: 4-(6-Chloro-5-methyl-pyridazin-3-yl)-N,N-dimethyl-benzamide and 4-(6-chloro-4-methyl pyridazin-3-yl)-N,N-dimethyl-benzamide. N' CH H /- NCH3 OH OH

H

3 C NC H 3 and

CH

3 1 N 1N 15 C1 N N CI NN A solution of N,N-dimethylbenzamide-4-boronic acid (7 g, 36.5 mmol), 3,6-dichloro-4-methyl pyridazine (5 g, 31 mmol) and Pd(PPh 3

)

4 (1.7 g, 1.5 mmol) in DMF (180 mL, degassed) was stirred at it for 1 h. Then sodium carbonate (12.3 g in 45 mL water, degassed) was added and the mixture was heated with stirring at 800C overnight. The mixture was filtered and the 20 filtrate was concentrated under reduced pressure. The residuel was diluted with EtOAc (100 mL), washed with brine, dried (sodium sulfate) and concentrated to give a crude product, which was purified by column chromatography on silica gel (EtOAc/petroleum ether = 1:1).

171 This afforded 2.5 g (28 %) of a mixture of 4-(6-chloro-5-methyl-pyridazin-3-yl)-N,N-dimethyl benzamide and 4-(6-chloro-4-methyl-pyridazin-3-yl)-N,N-dimethyl-benzamide, which was used directly in the next step. 5 Step 2: The mixture of isomers (1.5 g, 5.9 mmol) from the previous step and 1 -isopropyl-piperazine (3.7 g, 28.5 mmol) was heated at 2000C under a nitrogen atmosphere for 1 h. The mixture was cooled to rt and diluted with dichloromethane (30 mL). The mixture was washed with brine, dried (sodium sulfate) and concentrated to give a crude product that was purified by 10 preparative HPLC Method F to give 256 mg (8 %) of 4-[6-(4-isopropyl-piperazin-1 -yl)-4 methyl-pyridazin-3-yl]-N,N-dimethyl-benzamide and 278 mg (9 %) of 4-[6-(4-isopropyl piperazin-1 -yl)-5-methyl-pyridazin-3-yl]-N, N-dimethyl-benzamide as the TFA salts. 4-[6-(4-isopropyl-piperazin-1 -yl)-4-methyl-pyridazin-3-yl]-N,N-dimethyl-benzamide: 15 'H NMR (300 MHz, CD 3 0D) 6 7.76 (s, 1 H), 7.70-7.60 (m, 4H), 4.70-3.35 (m, 9H), 3.13 (s, 3H), 3.03 (s, 3H), 2.40 (s, 3H), 1.42 (d, 6H). HPLC (Method D): tr = 2.89 min (92 %). Example 195 (General Procedure A) 20 4-[6-(4-Isopropylpiperazin-1-yl)-5-methylpyridazin-3-yl]-N,N-dimethylbenzamide, trifluoro acetate N' CH 3 H3C N CH 3 N NN HC N TFA

CH

3 The title compound was prepared as described in Example 194. 'H NMR (300 MHz, CD 3 0D) 6 8.14 (s, 1H), 8.07 (d, 2H), 7.61 (d, 2H), 4.10-3.90 (m, 2H), 25 3.70-3.55 (m, 3H), 3.55-3.32 (m, 4H), 3.13 (s, 3H), 3.03 (s, 3H), 2.53 (s, 3H), 1.43 (d, 6H). HPLC (Method D): tr = 3.38 min (91 %). Example 196 (General Procedure A) N-{4-[6-(4-Isopropylpiperazin-1 -yl)-5-methylpyridazin-3-yl]phenyl}acetamide, trifluoroacetate 172 H N Y CH3 $ll N N

H

3 C Y N,) TFA

CH

3 The title compound was prepared as described in Example 72. 'H NMR (300 MHz, D 2 0) 6 8.10 (s, 1 H), 7.95 (dd, 2H), 7.78 (d, 2H), 4.02-3.85 (m, 2H), 3.70 3.50 (m, 3H), 3.50-3.32 (m, 4H), 2.52 (s, 3H), 2.16 (s, 3H), 1.44 (d, 6H). 5 HPLC (Method D): tr = 3.26 min (94 %). Example 197 (General Procedure A) 1'-(6-Pyridin-4-yl-pyridazin-3-yl)-[1,4']bipiperidinyl NN 10 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-pyridin-4-yl-pyridazine and 4-piperidinopiperidine. 1 H NMR (400 MHz, DMSO-d 6 ) 6 8.67 (dd, 2H), 8.04 (m, 3H), 7.40 (d, 1 H), 4.53 (d, 2H), 2.95 (t, 2H), 2.56 (m, 1 H), 2.45 (m, 4H), 1.82 (d, 2H), 1.48 (m, 6H) 1.38 (m, 2H). HPLC-MS (Method G): M+1 = 324; tr= 0.54 min. 15 Example 198 (General Procedure A) 3-(Pyridin-3-yl)-6-[(4-pyrrolidin-1 -yl)piperidin-1 -yl]pyridazine N N N NN The title compound was prepared by a similar procedure to that described in Example 1, 20 starting from 3-chloro-6-(pyridin-3-yl)-pyridazine and 4-(1 -pyrrolidinyl)piperidine. 'H NMR (400 MHz, DMSO-d) 6 9.22 (d, 1 H), 8.61 (dd,1 H), 8.39 (dt, 1 H), 8.01 (d, 1 H), 7.51 (m, 1 H), 173 7.40 (d, 1 H), 4.34 (dt, 2H), 3.09 (m, 2H), 2.56 (s, 4H), 2.33 (m, 1 H), 1.95 (m, 2H), 1.69 (m, 4H), 1.44 (m, 2H). HPLC-MS (Method G): M+1 = 310; t,= 0.38 min. 5 Example 199 (General Procedure A) 1'-(6-Pyridin-3-yl-pyridazin-3-yl)-[1,4']bipiperidinyl N N The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(pyridin-3-yl)-pyridazine and 4-piperidinopiperidine. 'H NMR (400 10 MHz, CD 3 0D) 6 9.47 (d, 1H), 9.11 (dt, 1 H), 8.93 (d, 1H), 8.40 (d, 1H), 8.15 (q, 1H), 7.94 (d, 1 H), 4.66(d, 2H), 3.66 (m, 1 H), 3.58 (d, 2H), 3.36 (t, 2H), 3.08 (t, 2H), 2.38 (d, 2H), 1.80-2.00 (m, 7H), 1.54 (m, 1H). HPLC-MS (Method G): M+1 = 324; t,= 0.55 min. 15 Example 200 (General Procedure A) 3-(Pyridin-4-yl)-6-((4-pyrrolidin-1 -yl)piperidin-1 -yl]pyridazine N N The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(pyridin-4-yl)-pyridazine and 4-(1 -pyrrolidinyl)piperidine. 1 H NMR 20 (400 MHz, CDC1 3 ) 6 8.69 (d, 2H), 7.90 (d, 2H), 7.67 (d, 1 H), 7.01 (d, 1 H), 4.47 (d, 2H), 3.12 (m, 2H), 2.67 (s, 4H), 2.40 (m, 1 H), 2.07 (d, 2H), 1.83 (s, 4H), 1.67 (m, 2H). HPLC-MS (Method G): M+1 = 310; tr= 0.46 min. Example 201 (General Procedure A) 25 4-Pyrrolidin-1 -yl-3,4,5,6-tetrahydro-2H-[1,2';5',3"]terpyridine 174 N The title compound was prepared by a similar procedure to that described in Example 1, starting from 6-chloro-[3,3']bipyridinyl and 4-(1-pyrrolidinyl)piperidine. 'H NMR (400 MHz,

CD

3 OD) 6 8.74 (d, 1 H), 8.46 (dd, 1 H), 8.39 (d, 1 H), 8.03 (dt, 1 H), 7.86 (dd, 1 H), 7.49 (q, 1 H), 5 6.95 (d, 1 H), 4.40 (d, 2H), 2.92 (m, 2H), 2.67 (t, 4H), 2.35 (m, 1 H), 2.05 (d, 2H), 1.82 (m, 4H), 1.51 (m, 2H). HPLC-MS (Method G): M+1 = 309; tr= 0.28 min. Example 202 (General Procedure A) 10 1 -Isopropyl-4-(6-phenylpyridin-3-yl)piperazine, dihydrochloride N' H3C N,

CH

3 2 HCI The title compound was prepared by a similar procedure to that described in Example 1, starting from 5-bromo-2-phenylpyridine and 1-isopropylpiperazine. 'H NMR (400 MHz,

CD

3 0D) 6 8.41 (m, 1 H), 8.13 (m, 2H), 7.90-7.85 (m, 2H), 7.63-7.55 (m, 3H), 4.3-4.1 (m, 2H), 15 3.75-3.55 (m, 3H), 3.50-3.30 (m, 4H), 1.45 (d, J = 6.8 Hz, 6H). HPLC-MS (Method G): M+1 = 282; tr= 0.76 min. Example 203 (General Procedure A) (R)-2-[6-(3,4-Dimethoxyphenyl)pyridazin-3-yl]octahydropyrido[1,2-a]pyrazine, dihydrochlo 20 ride

H

3 C O' CH3 N N'N N 2HCl N,,j 175 The title compound was prepared by a similar procedure to that described in Example 1, starting from 3-chloro-6-(3,4-dimethoxy-phenyl)-pyridazine and (R)-octahydro-pyridol[1,2-a] pyrazine, dihydrochloride. 1 H-NMR (400 MHz, CD 3 0D) 5 8.55 (d, 1H), 8.22 (d, 1H), 7.60-7.54 (m, 2H), 7.21 (d, 1H), 5 4.73-4.58 (m, 2H), 3.98 (s, 3H), 3.95 (s, 3H), 3.72-3.52 (m, 3H), 3.50-3.35 (m, 3H), 3.15-3.05 (m,1H), 2.12-2.05 (m, 1H), 2.02-1.93 (m, 3H), 1.81-1.63 (m, 2H). HPLC-MS (Method G): M+1 = 355; tr= 0.955 min. Example 204 (General Procedure B) 10 N-{3-[6-(4-Isopropylpiperazin-1-yl)pyridin-3-yl]benzyllacetamide, trifluoroacetate N N CH N

O

3

CH

3 TFA The title compound was prepared by a similar procedure to that described in Example 39, starting from 3-(6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine and acetyl chloride. 1 H NMR (300 MHz, D 2 0) 6 8.27 (d, 1H), 8.10 (s, 1H), 7.40-7.24 (m, 5H), 4.32-4.28 (d, 4H), 15 3.64-3.53 (m, 5H), 3.25 (t, 2H), 1.92 (s, 2H), 1.27 (d, 6H). HPLC (Method D): tr = 2.40 min (97 %). Example 205 (General Procedure B) N-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyll-3,3-dimethylbutyramide, trifluoroace 20 tate OH C N CH, H H 3 N N HC N TFA

CH

3 The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-(6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine and 3,3-dimethyl-butyryl chloride.

176 'H NMR (400 MHz, D 2 0) 6 8.29 (dd, 1H), 8.14 (d, 1H), 7.51 (d, 2H), 7.40-7.30 (m, 3H), 4.40 4.25 (m, 4H), 3.70-3.48 (m, 5H), 3.34-3.15 (m, 2H), 2.06 (s, 1H), 1.28 (dd, 6H), 0.86 (s, 9H). HPLC (Method D): tr = 3.38 min (97 %). 5 Example 206 (General Procedure B) N-{3-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl)-3,3-dimethylbutyramide, trifluoro acetate CH N N 3 Nr3 H 3C YN,) OH3C 3

CH

3 TFA The title compound was prepared by a similar procedure to that described in Example 39, 10 starting from 3-(6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine and 3,3-dimethyl-butyryl chloride. 1 H NMR (300 MHz, D20) 6 8.27 (d, 1H), 8.12 (s, 1H), 7.46-7.28 (m, 5H), 4.32-4.28 (d, 4H), 3.64-3.53 (m, 5H), 3.25 (t, 2H), 2.06 (s, 2H), 1.27 (d, 6H), 0.85 (s, 9H). HPLC (Method D): tr = 3.39 min (90 %). 15 Example 207 (General Procedure B) N-{4-[2-(4-Isopropylpiperazin-1-yl)pyrimidin-5-yl]benzyllisobutyramide, dihydrochloride

CH

3 N N HC N) 2 HCI

CH

3 The title compound was prepared by a similar procedure to that described in Example 39, 20 starting from 4-(6-(4-isopropylpiperazin-1 -yl)pyrimidin-5-yl]benzonitrile. Mp = 287-2890C. 'H NMR (300 MHz, CDC13) 6 13.06 (brs, 1H), 8.68 (s, 2H), 7.47-7.38 (m, 4H), 6.07 (brs, 1 H), 5.12 (d, 2H), 4.52-4.47 (m, 2H), 4.25-4.12 (m, 2H), 3.60-3.44 (m, 3H), 3.11-2.76 (m, 2H), 2.52-2.38 (m, 1 H), 1.49 (d, 6H), 1.21 (d, 6 H). 25 177 Example 208 (General Procedure B) N-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl)-2,2-dimethylpropionamide, trifluoro acetate 0 HN CH3 CH3 N N HOC N) TFA

CH

3 5 The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-(6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine and 2,2-dimethyl propionyl chloride. 1 H NMR (300 MHz, D 2 0) 6 8.29 (dd, 1H), 8.13 (d, 1H), 7.50 (d, 2H), 7.35-7.25 (m, 3H), 4.45 4.25 (m, 4H), 3.65-3.45 (m, 5H), 3.34-3.15 (m, 2H), 1.28 (d, 6H), 1.07 (s, 9H). 10 HPLC (Method D): tr = 2.84 min (98 %). Example 209 (General Procedure B) N-{3-[6-(4-Isopropylpiperazin-1 -yl)pyridin-3-yl]benzyl}-2,2-dimethylpropionamide, trifluoro acetate H13C O, H 3 N N N CH <N N0 H 3C YN,, TFA 15 CH 3 The title compound was prepared by a similar procedure to that described in Example 39, starting from 3-(6-(4-isopropylpiperazin-1 -yl)pyridin-3-yl]benzylamine and 2,2-dimethyl propionyl chloride. 1 H NMR (300 MHz, CDC13) 6 8.41 (d, 1H), 7.02 (t, 1H), 7.43-7.27 (m, 3H), 7.21-7.18 (m, 1 H), 20 6.72 (t, 1 H), 6.95-6.93 (m, 1 H), 4.49-4.46 (m, 2H), 3.78-3.62 (m, 4H), 2.90-2.65 (m, 5H), 1.17-1.10 (m, 15H). HPLC (Method D): tr = 3.10 min (98 %). Example 210 (General Procedure B) 4-[2-(4-Cyclopropylpiperazin-1 -yl)pyrimidin-5-yl]benzylamine 178 N NH 2 N_, The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-[2-(4-cyclopropyl-piperazin-1 -yl)-pyrimidin-5-yl]-benzonitrile. Mp = 150-1520C. 5 1 H NMR (300 MHz, CDC1 3 ) 6 8.55 (s, 2H), 7.45 (d, 2H), 7.39 (d, 2H), 3.91 (s, 2H), 3.86-3.83 (m, 4H), 2.72-2.68 (m, 4H), 1.69-1.61 (m, 1 H), 1.5 (brs, 2H), 0.52-0.46 (m, 4H). HPLC (Method Rx): tr = 3.29 min (99 %). Example 211 (General Procedure B) 10 N-{4-[2-(4-Cyclopropylpiperazin-1 -yl)pyrimidin-5-yl]benzyl}acetamide, dihydrochloride NCH rN N 2 HCI The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-[2-(4-cyclopropyl-piperazin-1 -yl)-pyrimidin-5-yl]-benzylamine and acetic anhydride. 15 Mp = 235-2360C. HPLC (Method Rx): tr = 7.11 min (100 %). Example 212 (General Procedure B) N N-{4-[6-(4-Isopropylpiperazin-1-yl)pyridazin-3-yl]acetamide, ditrifluoroacetate HN CH3 N N N' H3C N 2 TFA 20 CH 3 179 The title compound was prepared by a similar procedure to that described in Example 39, starting from 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-benzonitrile. 'H NMR (400 MHz, CD 3 0D) 6 8.24 (d, 1H), 7.91 (d, 2H), 7.84 (d, 1H), 7.50 (d, 2H), 4.44 (s, 2H), 3.63 (heptet, 1 H), 3.70-3.30 (broad m, 8H), 2.02 (s, 3H), 1.42 (d, 6H). 5 HPLC-MS (Method G): M+1 = 354; t,= 0.66 min. Example 213 (General Procedure F) N-[4-(4-Cyclopropyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)phenyl]acetamide, hydrochlo ride H N O N N N, HCI 10 N-[4-(3,4,5,6-Tetrahydro-2H-[1,2']bipyrazinyl-5'-yl)-phenyl]-acetamide (125 mg, 0.42 mmol) was dissolved in methanol (2 mL)and ethoxycyclopropoxy)trimethylsilane (0.11 g, 0.63 mmol) was added together with acetic acid (0.076 g, 1.26 mmol). The mixture was stirred for 5 min and sodium cyanoborohydride (0.04 g, 0.63 mmol) and water (1 mL) were added. The 15 reaction mixture was heated at 65 0 C for 1 h and then another equivalent of sodium cyano borohydride was added and stirring was continued at 650C for 1 h. The reaction mixture was evaporated in vacuo and the crystalline mixture was washed with methanol. Evaporation of the volatiles afforded a residue which after treatment with HCI in diethyl ether afforded 72 mg (46 %) of the title compound. 20 1 H-NMR (400 MHz, CD 3 0D) 6 8.85 (s, 1 H), 8.45 (s, 1 H), 7.85 (d, 2H), 7.75 (d, 2H), 4.6 (d, 2H), 3.7 (m, 2H), 3.5 (m, 4H), 2.95 (m, 1 H), 2.15 (s, 3H), 1.2 (brs, 2H), 1.05 (dd, 2H). HPLC-MS (Method G): M+1 = 338; tr = 1.51 min. Example 214 (General Procedure M) 25 2-{4-[6-(4-Isopropylpiperazin-1 -yl)pyridazin-3-yl]phenoxy}-N,N-dimethylacetamide, di hydrochloride 180 NOJ CH3 HH 3 H 3 C YN2 HCI

CH

3 Step 1: 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenol OH H3 N N

CH

3 5 4-[6-(4-isopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenol was prepared by the general proce dure I similar to that described in Example 71, starting from 3-chloro-6-(4-isopropyl-piperazin 1 -yl)-pyridazine and (4-hydroxyphenyl)boronic acid. Step 2: 10 A mixture of 4-[6-(4-isopropyl-piperazin-1-yi)-pyridazin-3-yl]-phenol (110 mg, 0.37 mmol) and 60 % sodium hydride (58 mg, 1.45 mmol) in dry DMF (5 mL) was heated at 600C for 30 min. 2-Chloro-N,N-dimethylacetamide (54 mg, 0.44 mmol) was added and heating at 600C was continued for another 20 h. The reaction mixture was evaporated to dryness and partitioned between water (10 mL) and DCM (10 mL). The organic phase was isolated, washed with 15 brine (5 mL), dried over anhydrous magnesium sulphate, and evaporated to dryness in vacuo. The residue was dissolved in hot ethyl acetate and HCIg in Et 2 0 was added to give the title compound. 'H NMR (400 MHz, DMSO-d) 6 11.29 (broad s, 1H), 8.30 (d, 1H), 8.00 (d, 2H), 7.86 (d, 1 H), 7.08 (d, 1H), 4.93 (s, 2H), 4.58 (d, 2H), 3.65(t, 2H), 3.51 (m, 3H), 3.16 (m, 2H), 3.02 (s, 3H), 20 2.85 (s, 3H), 1.32 (d, 6H). HPLC-MS (Method G): M+1 = 384; tr= 0.72 min. Example 215 (General Procedure L) Cyclohexanecarboxylic acid {4-[6-(4-cyclopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}amide, 25 trifluoroacetate 181 N O .. N N NJ TFA The title compound was prepared by a similar procedure to that described in Example 170, starting from 4-[6-(4-cyclopropyl-piperazin-1 -yl)-pyridazin-3-yl]-phenylamine and cyclohexyl carbonyl chloride. 5 'H NMR (300 MHz, CD 3 0D) 6 8.34 (d, 1H), 7.98-7.82 (m, 5H), 4.05-3.95 (m, 4H), 3.69-3.55 (m, 4H), 2.96-2.85 (m, 1 H), 2.44-2.37 (m, 1 H), 1.91-1.82 (m, 4H), 1.73 (d, 1 H), 1.59-1.19 (m, 5H), 1.09-0.99 (m, 4H). HPLC (Method D): t, = 3.90 min (98 %). 10 Example 216 N-{4-[4-Isopropyl-6-(4-isopropylpiperazin-1 -yl)pyridazin-3-yl]phenyl}acetamide, trifluoro acetate H H O CH 3 N NNN H3C N TFA

CH

3 A mixture of 3-(4-bromophenyl)-4-isopropyl-6-(4-isopropyl-piperazin-1-yl)-pyridazine (500 15 mg, 1.24 mmol), acetamide (87.8 mg, 1.49 mmol), Pd(OAc) 2 (13.9 mg, 0.062 mmol), Cs2CO3 (606 mg, 1.86 mmol) and Xantphos (53.8 mg, 0.093 mmol) in 1,4-dioxane (10 mL) was heated at reflux for 12 h. Then water (5 mL) was added. After filtration, the mixture was ex tracted with EtOAc (3 x 5 mL). The combined organic extracts were washed with brine, dried (Na 2

SO

4 ) and concentrated. The residue was purified by HPLC Method F to give 196 mg (38 20 %) of the title compound. 1 H NMR (300 MHz, CD 3 0D) 6 7.96 (s, 1 H), 7.89 (d, 2H), 7.57 (d, 2H), 4.90-3.314 (m, 9H), 3.19-3.15 (m, 1H), 2.20 (s, 3H), 1.46 (d, 6H), 1.31 (d, 6H). HPLC (Method D): tr = 3.35 min (100 %).

Claims (17)

1. A compound of the general formula 1: R ' WZl Z A 5 wherein W, X, Y, Z independent of each other is a moiety of the formula -C(R 2 )= or -N= (i.e. nitrogen), with the proviso that at least one of the symbols W, X, Y or Z must be the moiety N=; R 2 is hydrogen, halogen, cyano, C 1 . 6 -alkyl, C 1 . 6 -alkoxy, halo-C 1 . 6 -alkyl or halo-C 1 . 6 -alkoxy; 10 R' represents the following possibilities i) and ii): i) a group of the general formula -NR 3 R 4 , wherein 15 R 3 is hydrogen, C 1 . 6 -alkyl, C 2 . 6 -alkenyl or C3. 8 -cycloalkyl; and R 4 is C 1 . 6 -alkyl, C 2 . 6 -alkenyl or C 3 .- cycloalkyl, each of which are substituted with a group selected from -NR 5 R 6 and heterocyclyl; R 5 and R 6 independently represent hy drogen or C1. 6 -alkyl; or 20 ii) a group of one of the general formulas 11 to VII: a R 7 9 R )o N ) m ) M N IN NN* N R N |I I IV V 183 N )q N N N VI Vil wherein the star indicates the position of the free bond (and not a methyl group), and wherein m is 0 (zero), 1, 2 or 3; 5 n is 1, 2 or 3; o is 0 (zero), 1, 2, 3 or 4; 10 p is 0 (zero), 1 or 2; q is 1 or 2; Q represents a moiety of the formula -CH 2 - , -0-, -S- or >NR 3 , wherein R 3 is as defined 15 above; R 7 and R" independent of each other is hydrogen or C 1 . 6 -alkyl, or R 7 and R 8 can together with the nitrogen to which they are attached form a heterocyclyl group; 20 R 9 is C 1 . 6 -alkyl or C 3 - 8 -cycloalkyl, which both may be substituted with a group of the general formula -NR'R', wherein R 7 and R 8 are as defined above; R'Ois hydrogen or C 1 . 6 -alkyl; 25 R" is o hydrogen, C 1 . 8 -alkyl, C 3 . 8 -alkenyl, C3. 8 -alkynyl, C3. 8 -cycloalkyl, C 3 - 8 -cyclo alkenyl, C 3 . 8 -cycloalkyl-C 1 . 3 -alkyl, C 3 . 8 -cycloalkenyl-C 1 . 3 -alkyl or heterocyclyl, or o C 16 -alkyl or C 3 - 8 -cycloalkyl, which both are substituted with at least one sub 30 stituent selected from the group consisting of hydroxy, C 1 . 6 -alkoxy, C 1 . 6 -alkyl carbonyl, cyano, -NR 5 R 6 , -C(=0)NR 5 R 6 , arylcarbonyl, heteroarylcarbonyl, C- 184 6 -alkylsulfonyl, arylsulfonyl, heterocyclylcarbonyl, C 1 . 6 -alkoxycarbonyl, aryl-C 6 -alkoxycarbonyl, heteroaryl and heterocyclyl, which heterocyclyl may be sub stituted with C 1 . 6 -alkyl, where applicable; R 5 and R 6 are as defined above; 5 A is aryl or heteroaryl, each of which may optionally be substituted with one or more sub stituents independently selected from R 12 ; R 12 is e halogen, hydroxy, cyano, C, 6 -alkyl, C 3 s-cycloalkyl, halo-C, 6 -alkyl, C 1 e-alkoxy, 10 halo-C 1 . 6 -alkoxy, C 1 . 6 -alkylsulfonyl, C 1 6 -alkylsulfanyl, Cl 6 -alkylsulfinyl, -V (CH 2 )s-(C=0)-NR 1 3 R 14 , C 1 .- alkylcarbonyl, C 16 -alkoxycarbonyl, C 16 -alkyl carboxy, cyano-C. 6 -alkyl, hydroxy-Cl. 6 -alkyl, C 1 .- alkoxy-C 1 . 6 -alkyl, C1. 6 -alkyl carbonylamino, N-(C -alkylcarbonyl)-N-(C 1 6 -alkyl)amino, C1. 6 -alkylcarbonyl amino-C 1 . 6 -alkyl or N-(C 1 . 6 -alkylcarbonyl)-N-(Cl 6 -alkyl)amino-C 1 . 6 -alkyl; or 15 " heterocyclyl, heterocyclyl-C 1 . 6 -alkyl, heterocyclyl-C 1 . 6 -alkoxy, heterocyclyl carbonyl, C 3 . 8 -cycloalkylcarbonylamino, N-(C 3 . 8 -cycloalkylcarbonyl)-N-(C- 6 alkyl)amino, C 3 . 8 -cycloalkylcarbonylamino-C 1 . 6 -alkyl, N-(C 3 . 8 -cycloalkyl carbonyl)-N-(Cl- 6 -alkyl)amino-C 1 6 -alkyl, C 3 . 8 -cycloalkyl-C 16 -alkylcarbonyl 20 amino, N-(C 3 .- cycloalkyl-C 1 . 6 -alkylcarbonyl)-N-(C 6 -alkyl)amino, C 3 . 8 -cyclo alkyl-C 1 . 6 -alkylcarbonylamino-C 1 . 6 -alkyl, N-(C 3 . 8 -cycloalkyl-C 1 . 6 -alkylcarbonyl) N-(C 16 -alkyl)amino-C 1 . 6 -alkyl, arylcarbonylamino, aryl-C 16 -alkylcarbonylamino, arylcarbonylamino-C 1 . 6 -alkyl, aryl-C 1 6 -alkylcarbonylamino-C 6 -alkyl, hetero arylcarbonylamino, heteroarylcarbonylamino-C 1 . 6 -alkyl, heterocyclylcarbonyl 25 amino or heterocyclylcarbonylamino-C 6 -alkyl, wherein each said aryl, hetero aryl, C 3 . 8 -cycloalkyl and heterocyclyl may optionally be substituted with halo gen, hydroxy, oxo, cyano, C 1 . 6 -alkyl, C 3 - 8 -cycloalkyl, halo-C1. 6 -alkyl, C alkoxy, halo-C 6 -alkoxy, Cl 6 -alkylsulfonyl, C 1 . 6 -alkylsulfinyl, C 6 -alkylcarbonyl, C 16 -alkoxycarbonyl, C 16 -alkylcarboxy, cyano-C 1 6 -alkyl, hydroxy-C 6 -alkyl or 30 C 1 . 6 -alkoxy-Cse-alkyl; or e aryl or heteroaryl, each of which may be substituted with halogen, hydroxy, oxo, carboxy, nitro, cyano, C 1 . 6 -alkyl, C 3 - 8 -cycloalkyl, C, 6 -alkoxy, C 1 - 6 -alkyl sulfanyl, C 16 -alkylsulfonyl, C 1 . 6 -alkylcarbonyl, Cl 6 -alkylcarbonylamino, C1.6 35 alkylcarbonylamino-C 1 . 6 -alkyl, C, 6 -alkoxycarbonyl, Cl.e-alkylcarboxy, halo-C 185 6 -alkyl, halo-C1. 6 -alkoxy, hydroxy-C 1 . 6 -alkyl, C1. 6 -alkoxy-C 1 . 6 -alkyl, aryl, arylcar bonylamino, arylcarbonylamino-C 1 . 6 -alkyl, heteroaryl, heteroarylcarbonyl amino, heteroarylcarbonylamino-C 1 . 6 -alkyl or -(CH 2 )s-(C=O),-NR 13 R 1 4 ; 5 r is 0 (zero) or 1; s is 0 (zero), 1, 2 or 3; V represents a bond or moiety of the formula, -0-, -S-, -S(=0)-, -S(=0) 2 - or >NR 3 , wherein 10 R 3 is as defined above; R 13 is hydrogen, C 1 . 6 -alkyl, C 3 . 8 -cycloalkyl or C 1 . 6 -alkylcarbonyl; R 1 4 is hydrogen, C1. 6 -alkyl or C 3 . 8 -cycloalkyl with the proviso that R 14 is hydrogen when R 13 is 15 C 1 . 6 -alkylcarbonyl; or R' 3 and R' 4 can together with the attached nitrogen form a heterocyclyl group, which heterocyclyl group may be optionally substituted with halogen, hydroxy, cyano, C 1 . 6 -alkyl, C 3 8 -cycloalkyl, halo-C 1 . 6 -alkyl, C 1 .6-alkoxy, halo-C, 6 -alkoxy, C 1 . 6 -alkylcarbonyl, Cj 6 -alkoxycarbonyl, C- 6 -alkylcarboxy, cyano-C 1 . 6 -alkyl, hydroxy-C1. 6 -alkyl or aminocarbonyl; 20 and pharmaceutically acceptable salts and solvates thereof; with the following provisos a) through g): a) when R' is a group of the formula VI; W is -N=; X, Y and Z is each a moiety of the general 25 formula -C(R 2 )=; wherein R 2 is as defined above; then A cannot be imidazolyl; b) when R 1 is a group of the formula VI; q is 1; X is -C(R 2 )=; R" is branched C 4 . 6 -alkyl, branched C 4 . 6 -alkenyl, branched C 4 . 6 -alkynyl, C3. 5 -cycloalkyl, C 3 . 7 -cycloalkenyl, C 3 . 6 -cyclo alkyl-C 1 3 -alkyl or C 3 . 6 -cycloalkenyl-C 1 . 3 -alkyl; and W, Y, Z is each a moiety of the formula 30 C(R 2 )= or -N=; wherein R 2 is as defined above; then R1 2 can not be halogen, hydroxy, tri fluoromethyl, trifluoromethoxy, C 1 . 6 -alkoxy , C 1 . 6 -alkyl, C 1 . 6 -alkylsulfonyl, cyano, aryl, hetero aryl, C 38 -cycloalkyl or a group of the formula -V-(CH 2 ),-(C=O),-NR R' 4 , wherein V is a bond, r and s each is 0 (zero), and R 13 and R 14 each is hydrogen or C 1 . 6 -alkyl; 186 c) when R 1 is a group of the formula VII; m is 1, 2 or 3; X is a moiety of the formula -C(R 2 )=; and W, Y, Z is each a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as defined above; then R 1 2 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C 16 -alkoxy, C 1 . 6 -alkyl, C 1 . 6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3 . 8 -cycloalkyl or a group of the formula -V-(CH 2 ). 5 (C=O)r-NR 13 R 14 , wherein V is a bond, r and s each is 0 (zero), and R" and R 14 each is hy drogen or C 1 . 6 -alkyl; d) when R 1 is a group of the formula VI; q is 1; R" is ethyl, n-propyl or isopropyl; Y and Z is each -N=; X is a moiety of the formula -C(R 2 )=, and W is a moiety of the formula -C(R 2 )= or 10 -N=; wherein R 2 is as defined above; then R 12 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C1. 6 -alkoxy, C 1 . 6 -alkyl, C -alkylsulfonyl, C ,-alkylsulfinyl, cyano, aryl, het eroaryl, C 3 . 8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=0)-NR R , wherein r and s each is 0 (zero), and R 13 and R1 4 each is hydrogen or C 1 . 6 -alkyl; 15 e) when R' is a group of the formula VII; m is 1, 2 or 3; Y and Z is each -N=; X is a moiety of the formula -C(R 2 )=; and W is a moiety of the formula -C(R 2 )= or -N=; wherein R 2 is as de fined above; then R 12 can not be halogen, hydroxy, trifluoromethyl, trifluoromethoxy, C16 alkoxy, C 1 . 6 -alkyl, C 1 . 6 -alkylsulfonyl, cyano, aryl, heteroaryl, C- 8 -cycloalkyl or a group of the formula -(CH 2 )s-(C=0)-NR R 4 , wherein r and s each is 0 (zero), and R 1 and R" each is 20 hydrogen or C 1 . 6 -alkyl; f) when R 1 is formula VI, q is 1, X and W is each a moiety of the general formula -C(R 2 )=, wherein R 2 is as defined above , Y and Z is each -N=, R" is isopropyl, and A is phenyl, then R can not be fluoro, bromo, iodo, hydroxy, trifluoromethoxy, C 2 . 6 -alkoxy, C 1 . 6 -alkyl, C2-6 25 alkylsulfanyl, C 2 . 6 -alkylsulfinyl, C2. 6 -alkylsulfonyl, cyano, aryl, heteroaryl, C 3 5 -cycloalkyl or a group of the formula -(CH 2 )s-(C=O)r-NR R", wherein r and s each is 0 (zero), and R4 and R 14 each is hydrogen or C 1 . 6 -alkyl; and g) when X and Z is each -C(R 2 )=; and one or both of W and Y are -N=; then R 1 cannot be a 30 group of the formula 11, wherein m is 2.

2. A compound according to claim 1 with the following provisos h) - m): h) R 1 is different from possibility i), when the ring containing W, X, Y and Z is a pyridazine or a pyrimidine ring, i) R" is different from hydrogen and methyl, j) R 2 is different from cyano, k) at least one of W, 35 X, Y and Z is a moiety of the formula -C(R 2 )= wherein R 2 is as defined herein, 1) R' is not a 187 group of formula II when the ring containing W, X, Y and Z is a pyridazine ring, and m) A is different from pyrazol-1-yl when the ring containing W, X, Y and Z is a pyridazine ring.

3. The use of a compound of formula I according to any of the preceding product claims as me 5 dicament or in a pharmaceutical composition.

4. A pharmaceutical composition comprising, as an active ingredient, at least one compound according to any one of the preceding product claims together with one or more pharmaceu tically acceptable carriers or recipients, which composition preferably comprises from about 10 0.05 mg to about 1000 mg, preferably from about 0.1 mg to about 500 mg, and especially preferred from about 0.5 mg to about 200 mg, of a compound according to any one of the preceding product claims.

5. Use of a compound according to any one of the preceding product claims for the prepara 15 tion of a pharmaceutical composition for the treatment of disorders and diseases related to the histamine H3 receptor.

6. Use of a compound according to any one of the preceding product claims for the prepara tion of a pharmaceutical composition for the reduction of weight. 20

7. Use of a compound according to any one of the preceding product claims for the prepara tion of a pharmaceutical composition for the treatment of overweight or obesity.

8. Use of a compound according to any one of the preceding product claims for the prepara 25 tion of a pharmaceutical composition for the suppression of appetite or for satiety induction.

9. Use of a compound according to any one of the preceding product claims for the prepara tion of a pharmaceutical composition for the prevention and/or treatment of eating disorders such as bulimia and binge eating. 30

10. Use of a compound according to any one of the preceding product claims for the prepa ration of a pharmaceutical composition for the treatment of IGT.

11. Use of a compound according to any one of the preceding product claims for the prepa 35 ration of a pharmaceutical composition for the treatment of type 2 diabetes. 188

12. Use of a compound according to any one of the preceding product claims for the prepa ration of a pharmaceutical composition for the delaying or prevention of the progression from IGT to type 2 diabetes. 5

13. Use of a compound according to any one of the preceding product claims for the prepa ration of a pharmaceutical composition for the delaying or prevention of the progression from non-insulin requiring type 2 diabetes to insulin requiring type 2 diabetes. 10

14. Use of a compound according to any one of the preceding product claims for the prepa ration of a pharmaceutical composition for the treatment of allergic rhinitis, ulcer or anorexia.

15. Use of a compound according to any one of the preceding product claims for the preparation of a pharmaceutical composition for the treatment of Alzheimer's disease, 15 narcolepsy or attention deficit disorders.

16. A method for the treatment of any of the diseases or conditions mentioned in any of the pre ceding claims and/or in the above specification, the method comprising administering to a sub ject in need thereof an effective amount of a compound according to any of the above product 20 claims or a pharmaceutical composition according to the above claim thereon.

17. Any novel feature or combination of features described herein.