WO1992007567A1 - Imidazolidinone compounds - Google Patents

Abstract

Novel imidazolidinone derivatives are described which inhibit the production of Tumor Necrosis Factor and are useful in the treatment of disease stated mediated or exacerbated by TNF production. The compounds of the present invention are also useful as inhibitors of PDE IV and are therefore useful in the treatment of disease states in need of mediation or inhibition thereof.

Description

IMIDAZOLIDINONE COMPOUNDS

Field of Invention

The present invention relates to novel compounds, pharmaceutical compositions containing these compounds and their use in treating allergic and inflammatory diseases and for inhibiting the production of Tumor Necrosis Factor (TNF). Background of the Invention

Bronchial asthma is a complex, multifactorial disease characterized by reversible narrowing of the airway and hyperreactivity of the respiratory tract to external stimuli.

Identification of novel therapeutic agents for asthma is made difficult by the fact that multiple mediators are responsible for the development of the disease. Thus, it seems unlikely that eliminating the effects of a single mediator will have a substantial effect on all three components of chronic asthma. An alternative to the "mediator approach" is to regulate the activity of the cells responsible for the pathophysiology of the disease. One such way is by elevating levels of cAMP (adenosine cyclic 3',5^!- monophosphate). Cyclic AMP has been shown to be a second messenger mediating the biologic responses to a wide range of hormones, neurotransmitters and drugs; Krebs Endocrinology Proceedings of the 4th International Congress Excerpta Medica, pgs 17- 29, 1973). When the appropriate agonist binds to specific cell surface receptors, adenylate cyclase is activated which converts Mg+2-ATP to cAMP at an accelerated rate.

Cyclic AMP modulates the activity of most, if not all, of the cells that contribute to the pathophysiology of extrinsic (allergic) asthma. As such, an elevation of cAMP would produce beneficial effects including: 1) airway smooth muscle relaxation, 2) inhibition of mast cell mediator release, 3) suppression of neutrophil de-granulation, 4) inhibition of basophil degranulation, and 5) inhibition of monocyte and macrophage activation. Hence, compounds that activate adenylate cyclase or inhibit PDE should be effective in suppressing the inappropriate activation of airway smooth muscle and a wide variety of inflammatory cells. The principal cellular mechanism for the inactivation of cAMP is hydrolysis of the 3'-phosphodiester bond by one or more of a family of isozymes referred to as cyclic nucleotide phosphodiesterases (PDEs). It has now been shown that a distinct cyclic nucleotide phosphodiesterase (PDE) isozyme, PDE IV, is responsible for cyclic AMP breakdown in airway smooth muscle and inflammatory cells. (Torphy, "Phosphodiesterase IsozymesiPotential Targets for Novel Anti-asthmatic Agents" in New Drugs for Asthma, Barnes, ed. IBC Technical Services Ltd. (1989)). Research indicates that inhibition of this enzyme not only produces airway smooth muscle relaxation, but also suppresses degranulation of mast cells, basophils and neutrophils along with inhibiting the activation of monocytes and neutrophils. Moreover, the beneficial effects of PDE IV inhibitors are markedly potentiated when adenylate cyclase activity of target cells is elevated by appropriate hormones or autocoids, as would be the case in vivo. Thus PDE IV inhibitors would be effective in the asthmatic lung, where levels of prostaglandin E2 and prostacyclin (activators of adenylate cyclase) are elevated. Such compounds would offer a unique approach toward the pharmacotherapy of bronchial asthma and possess significant therapeutic advantages over agents currently on the market The compounds of this invention also inhibit the in vivo production of

Tumor Necrosis Factor (TNF), a serum glycoprotein. Excessive or unregulated TNF production is implicated in mediating or exacerbating a number of diseases including rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis and other arthritic conditions; sepsis, septic shock, endotoxic shock, gram negative sepsis, toxic shock syndrome, adult respiratory distress syndrome, cerebral malaria, chronic pulmonary inflammatory disease, silicosis, pulmonary sarcoisosis, bone resorption diseases, reperfusion injury, graft vs. host reaction, allograft rejections, fever and myalgias due to infection, such as influenza, cachexia secondary to infection or malignancy, cachexia, secondary to acquired immune deficiency syndrome (AIDS), AIDS, ARC (AIDS related complex), keloid formation, scar tissue formation, Crohn's disease, ulcerative colitis, or pyresis.

AIDS results from the infection of T lymphocytes with Human Immunodeficiency Virus (HIV). At least three types or strains of HIV have been identified, i.e., HIV-1, HIV-2 andHIV-3. As a consequence of HIV infection, T-cell mediated immunity is impaired and infected individuals manifest severe opportunistic infections and/or unusual neoplasms. HIV entry into the T lymphocyte requires T lymphocyte activation. Other viruses, such as HIV-1, HTV-2 infect T lymphocytes after T Cell activation and such virus protein expression and/or replication is mediated or maintained by such T cell activation. Once an activated T lymphocyte is infected with HIV, the T lymphocyte must continue to be maintained, in an activated state to permit HIV gene expression and or HIV replication. Monokines, specifically TNF, are implicated in activated T-cell mediated HIV protein expression and/or virus replication by playing a role

SUBSTITUTE SHEET in maintaining T lymphocyte activation. Therefore, interference with monokine activity such as by inhibition of monokine production, notably TNF, in an HTV-infected individual aids in limiting the maintenance of T cell activation, thereby reducing the progression of HIV infectivity to previously uninfected cells which results in a slowing or elimination of the progression of immune dysfunction caused by HIV infection.

Monocytes, macrophages, and related cells, such as kupffer and glial cells, have also been implicated in maintenance of the HIV infection. These cells, like T-cells, are targets for viral replication and the level of viral replication is dependent upon the activation state of the cells. [See Rosenberg et al.. The Immunopathόgenesis of HTV Infection, Advances in Immunology, Vol. 57, (1989)]. Monokines, such as TNF, have been shown.to activate HIV replication in monocytes and/or macrophages [See Poli, et al.. Proc. Natl. Acad. Sci., 87:782-784 (1990)], therefore, inhibition of monokine production or activity aids in limiting HIV progression as stated above for T-cells.

TNF has also been implicated in various roles with other viral infections, such as the cytomegalia virus (CMV), influenza virus, and the herpes virus for similar reasons as those noted.

The ability to control the adverse effects of TNF is furthered by the use of the compounds which inhibit TNF in mammals who are in need of such use. There remains a need for compounds which are useful in treating TNF mediated disease states which are exacerbated or caused by the excessive and/or unregulated production of TNF.

Summary of the Invention

This invention relates to the novel compounds of Formula (I), as shown below, having Tumor Necrosis Factor inhibitory activity. This invention also relates to the pharmaceutical compositions comprising a compound of Formula (I), or pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier or diluent.

This invention also relates to a method of inhibiting TNF production in a mammal, including humans, which method comprises administering to a mammal in need of such treatment, an effective TNF inhibiting amount of a compound of Formula (I).

This method may be used for the prophylactic treatment or prevention of certain TNF mediated disease states amenable thereto.

This invention also relates to a method of treating a human afflicted with a human immunodeficiency virus (HTV), which comprises administering to such human an effective TNF inhibiting amount of a compound of Formula (I).

The compounds of Formula (I) are also useful in the treatment of additional viral infections, where such viruses are sensitive to upregulation by TNF or

SUBSTITUTE SHEET will elicit TNF production in vivo. The viruses contemplated for treatment herein are those which are sensitive to inhibition, such as by decreased replication, directly or indirectly, by the TNF inhibitors of Formula (I). Such viruses include, but are not limited to; HIV-1, HIV-2 and HIV-3 as noted above, Cytomegalovirus (CMV), Influenza, and the Herpes family of viruses, such as Herpes Simplex & Herpes Zoster.

This invention also relates to the novel compounds and pharmaceutical compositions, of Formula (la), a sub-genus of the compounds of Formula (I) having

TNF activity but also are useful in the mediation or inhibition of phosphodiesterase IV

(PDE IV). The invention also relates to a method of inhibiting phosphodiesterase IV in a mammal, including humans, which comprises administering to an mammal in need thereof an effective amount of a compound of Formula (la), as shown below.

The invention further provides a method for the treatment of allergic and inflammatory disease which comprises administering to a mammal in need thereof, an effective amount of a compound of Formula (la).

The invention also provides a method for the treatment of asthma which comprises administering to an a mammal in need thereof, an effective amount of a compound of Formula (la).

The compounds of Formula (I) are represented by the structure:

wherein:

R! is - (CRoRlO)n- (C(0)0)_r -(CR9 lθ)m-R8- -(CRoRlθ)n- (C(0)NR6)r-(CR9RlO)m-R8, or- (CR9Rio)_n- (0)_s -(CR9Riθ)m-R8 wherein the alkyl moieties may be optionally substituted with one or more halogens; n is a number having a value of 0 to 4; m is a number having a value of 0 to 2; r is a number having a value of 0 or 1; s is a number having a value of 0 or 1;

R9 and Rio are independently selected from hydrogen or a Ci-2 alkyl; R8 is hydrogen, methyl, hydroxyl, tetrahydrofuran, tetrahydropyran, tetrahydrothiophene, tetrahydrothiopyran, C3-6 cycloalkyl, or a C .-6 cycloalkyl containing one or two unsaturated bonds, wherein the cycloalkyl and heterocyclic moieties may be optionally substituted by 1 to 3 methyl groups or one ethyl group;

SUBSTITUTE SHEET provided that a) when r is 1, n is 1 to 4; or b) when s is 1, n is 2 to 4; or c) when Rs is hydroxyl, r is 1, and n is 1 to 4, then m is 2; or d) when R^~ is hydroxyl, and r or s is 0, then the sum of n + m is 2 to 6; or e) when m is 0, r is 1 in -(CR9Rιo)_n- (C(0)0)r -(CR9Rιo)m-R8- then n is 1 to 4; or f) when Rg is a 2-tetrahydropyran or 2-tetrahydrothiopyran, 2-tetrahydrofuran or

2-tetrahydrothiophene, and r or s is 0, then the sum of n + m is 1 to 6; or g) when R_ is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or

2-tetrahydrothiophene, n is 1 to 4, and r is 1, then m must be 1 to 2; or h) when _ is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or 2-tetrahydrothiophene, n is 2 to 4, and s is 1, then m must be 1 to 2; X is YR2, halogen, nitro, NR6R7, or formyl amine; Y is O or S(0)_m-; m¹ is a number having a value of 0 to 2;

R2 is -CH3 or -CH2CH3 optionally substituted by 1 or more halogens; R3 is H, CH3, CN, CH2F, CHF2, or CF3; R4 is H, C1-C4 alkyl, OH, OCH3, OCH2CH3, or OAc; R5 is H, OH, -(CH2)qAr, or Cj.g alkyl wherein the (CH2)_qAr or C g alkyl group is optionally substituted one or more times by F, Br, Cl, -NO2, -NR5R7,

-CO2R6- -OR6, -OC(0)R6, C(0)R6, CN, -C(0)-NR6R7, -C(S)-NR6R7, -NR6-C(0)-NR6R7, - NR6-C(S)-NR6R7, - NR6-C(0)-R6, - NR6-C(S)-R6, -NR6-C(0)-OR6, C(=NR6)-NR6R7, -C(=NCN)-NR6R7, -C(=NCN)-SR6, -NR6-C(=NCN)-SR6 , - NR6-C(=NCN)-NR6R7, -C(=NR6R7)SR6,

-NR6-S(0)₂-R6, - S(0)_m'-R6, -NR6SO2-CF3, - NR₆C(0)-C(0)-NR6R7- -NR6-C(0)-C(0)-OR6, 1-imidazolyl, or l-(NR6)-2-imidazolyl ;

Ar is 2-, 3- or 4-pyridyl, pyrimidyl, pyrazyl, imidazolyl, morpholino, 4- or 5- thiazolyl, triazolyl, 2- or 3- thienyl, 2-thiaphene, or phenyl; Rβ and R7 are independently hydrogen, or C1. alkyl optionally substituted by one or more halogens; q is a number having a value of 0 to 2; and the pharmaceutically acceptable salts thereof.

Detailed Description of the Invention

The compounds of Formula (la) are represented by the structure:

STITUTE SHEET

wherein

Rl is -CH2-C3 cyclic alkyl, -CH2-C5-6 cyclic alkyl, C4-6 cyclic alkyl, tetrahydrofuran, cyclopentenyl,-Ci-7 alkyl optionally substituted by 1 or more fluorines,

-(CH2)2-4 OH, -(CH2)n-C(0)0(CH2)m-CH3, - (CH2)p-0-(CH2)mCH3, aU of which may be optionally substituted by one to three methyl groups or one ethyl group; m is a number having a value of 0 to 2; n is a number having a value of 1 to 3; p is a number having a value of 2 or 3;

Xis YR2;

Yis O or S;

R2 is -CH3 or CH2CH3 optionally substituted by 1 or more fluorines; R3 is H, CH3, CN, CH2F, CHF2 or CF3;

R4 is H, Cl-4 alkyl, OH, OCH3, OCH2CH3, or OAc;

R5 is H, OH, -(CH2)q Ar, Ci-6 alkyl; wherein Ar and Cl-6 alkyl may be unsubstituted or substituted by one or more of the following:

F,Br, Cl,NO2,NR6R7, CO2R6. -NH-C(=NCN)-SCH3, -NHC(0)- NR6R7,-C(0)NR6R7,-NHC(0)CH3,-NH-(=NCN)-NR6R7.-NHC(0)C(0> NR6 7, -NHSO2CH3,-S(0)_mCH3,-NHC(0)C(0)-OR6,-OR6,-CN,-C(=NR6)-NR6R7,

Ar is 2-, 3- or 4-pyridyl, pyrimidyl, pyrazyl, imidazolyl, morpholino, or phenyl;

R and R7 are independently hydrogen, or Cι_4 alkyl ; q is a number having a value of 0 to 2; or a pharmaceutically acceptable salt thereof.

Another aspect of the present invention is the novel compounds of

Formula (H), also a sub-genus of Formula (I) having activity as an inhibitor of TNF.

BSTITUTE SHEET The compounds of Formula (II) are represented by the structure:

wherein: Ri, n, m, r, s, q, R8, R3 , R4 , R5, Ar, Rg, and R7 are as defined for

Formula (I);

Xl is halogen, nitro, NR6R7, or formyl amine; and pharmaceutically acceptable salts thereof.

When Rl for the compounds of Formula (I) and (II) is an alkyl substituted by 1 or more halogens, the halogens are preferably fluorine and chlorine, more preferably a Ci-4 alkyl substituted by 1 or more fluorines, more preferably 1 or more times by fluorine. The most preferred chain length is one or two carbons, and most preferred is a -CF3, CH2F, -CHF2, -CF2CHF2, CH2CF3, or -CH2CHF2 moiety. More preferred are those compounds in which Ri is cyclopentyl,

- -CF3^C,^H -²C-H0F2, or. C-H3^c.^H THhe Ri te.rm^~0 contains the moiety (CR9R10) wherein the R9 and Rio are independently hydrogen or alkyl. This allows for branching of the individual methylene units as (CR9Rιo)n or (CR9Rιo)mJ each repeating methylene unit is independent of the other, e.g. (CR9Rιo)n wherein n is 2 can be -CH2CH(CH3)-, for instance. The individual hydrogen atoms of the repeating methylene unit or the branching hydrocarbon can be substituted by fluorine independent of each other to yield, for instance, the preferred Rl substitutions, as noted above.

Preferred Ri groups for the compounds of Formula (la) are -CH2-C3 cyclo- alkyl, -CH2-C5-6 cycloalkyl, C4-6 cycloalkyl, tetrahydrofuran, cyclopentenyl, -

Cl-7 alkyl optionally substituted by 1 or more fluorines, and -(CH2)2-4 OH. When Rl is a C₁-₇ alkyl optionally substituted by fluorine the more preferred groups are -CF3, - CH2F, CHF2, -CF2CHF2, CH2CF3, or -CH2CHF2. Preferred X groups for both Formulas (I) and (la) are those wherein X is

YR2, Y is oxygen. Preferred R2 groups for the compounds of both Formula (I) and (II), and (la) where applicable is a Cl-2 alkyl optionally substituted by 1 or more halogens.

TUTE SHEET The halogens atoms arc prcferably fluorine and chlorine, more preferably fluorine. More preferred R2 groups those wherein R2 is methyl, or the fluoro-substituted alkyls, specifically a Cl-2 alkyl, such as a -CF3, CHF2, or -CH2CHF2 moiety. Most preferred are the CHF2 and CH3 moieties. Preferred R5 groups are the optionally substituted -(CH2)qAr moiety, wherein q is preferably 1, or an optionally substituted Ci-6 alkyl, more preferably when R5 is an alkyl and more preferred when R5 is a C3-5 alkyl . Preferred substituent groups on the alkyl and aryl moieties are F, Br, Cl, NO2, NR6R7, CO2R6- -NH- C(=NCN)-SCH3, -NHC(0)-NR6R7, -C(0)NR6R7, -NHC(0)CH3, -NH-(=NCN)-NR6R7,

-NHC(0)C(0)-NR6R7, -NHSO2CH3, -S(0)_mCH3, -NHC(0)C(0)-OR6, -OR6, -

More preferred substituent groups are -NH2, -N(CH3)2,-S(0)_mCH3, - NH-C(0)-CH₃, -CO2CH3, OCH3, C0₂H, Nθ2,-NH-C(=NCN)-SCH₃, -NH-

C(=NCN)-NH₂, -NH-C(0)-NH₂, -NR-C(0)-C(0)-OR₆₎ or NH-C(0)-C(0)-NR6R7. Preferably, the Ar moiety is phenyl.

Preferred R4 substituents for the compounds of Formulas (I), (la) and QI) are H, Cl-2 alkyl or OCH3. Preferred are those compounds of Formula (I) and (la) wherein R5 is an optionally substituted -(CH2)qAr, q is 0 or 1 or an optionally substituted C3-5 alkyl; Ri is -CH2-C3 cyclic alkyl, -CH2-C5-6 cyclic alkyl, C4-6 cyclic alkyl, tetrahydrofuran, cyclopentenyl, -Cl-7 alkyl optionally substituted by 1 or more fluorines, and -(CH2)2-4 OH; R2 is methyl or fluro substituted alkyl, R3 is CN, CHF2, CF3, or H; R4 is H, Ci- 4 alkyl or OCH3; Y is oxygen.

More preferred compounds are those Ri, R2, and Y are as described above, and R5 is Ar is optionally substituted -(CH2)qAr, q is 1 and Ar is phenyl; R3, is H, CN, methyl or CHF2 and R4 is H or Ci-4 alkyl. The optional substituents are selected from -NH-C(0)-CH₃, -NH-C(=NCN)-SCH₃, -NH-C(=NCN)-NH2, -NH-C(0)-NH₂, -

NH₂, -N(CH₃)₂, -NH-C(0)-C(0)-NH2, or -NHC(0)C02CH3 group.

Most preferred are those compounds wherein Rl is cylopentyl, methyl or CF2H, R3 is H, CN or CH3, R4 is hydrogen, X is YR2, Y is oxygen , R2 is CF2H or methyl, andRs

SUBSTITUTE SHEET is benzyl substituted by a -NH-C(0)-CH₃, -NH-C(=NCN)-SCH₃, -NH-C(=NCN)- NH2, -NH-C(0)-NH₂, -NH₂, -N(CH₃)₂, -NH-C(0)-C(0)-NH2, or - NHC(0)C02CH3 group.

Especially preferred are the following compounds: l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-3-methyl-2- imidazolidinone;

4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(4-dimethylaminobenzyl)-2- imidazolidinone;

4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone; l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone S-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone

S-(-)-l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; S-(-)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

S-(-)-l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)- 1 -(4- Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone;

S-(-)-l-(4-Oxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; R-(+ )- l-(4-Oxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone;

S-(-)-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone; l-(4-Acetamido-3-pyridylmethyl)-4-(3-cyclopentyloxy-4- methoxyphenyi)-2-imidazolidinone;

SUBSTITUTE SHEET S-(-)-4-(3-Cyclopentyloxy* -memoxyphenyl)-l-(2,4-diaminobenzyl)-2- imidazolidinone;

S-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone; R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diaminobenzyl)-

2-imidazolidinone; or

R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone.

Another aspect are the novel intermediates used herein, in particular

Formulas (5) and (6). Preferred exemplified compounds of Formula (5) are (2R)- and

(2S)-l-Benzyloxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)- menthyloxycarbonylamino]ethane.

The compounds of the present invention may contain one or more asymmetric carbon atoms and may exist in racemic and optically active forms. All of these compounds are contemplated to be within the scope of the present invention. By the term "Ci.γalkyl" or "alkyl" groups as used herein is meant to include both straight or branched chain radicals of 1 to 7 carbon atoms, unless the chain length is limited thereto, including, but not limited to methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, and the like.

By the term "alkenyl" as used herein is meant to include, but not limited to vinyl, 1-prσpenyl, 2-propenyl, 2-propinyl or 3-methyl-2-propenyl.

By the term "cycloalkyl" or "cycloalkyl alkyl" as used herein is meant to include groups of 3-7 carbon atoms, such as cyclopropyl, cyclopropylmethyl, cyclopentyl orcyclohexyl.

By the term "aryl" or "aralkyl", unless specified otherwise, as used herein is meant an aromatic ring or ring system of 6-10 carbon atoms, preferably monocycle, such as phenyl, benzyl, phenethyl or naphthyl.

By the term "halo" as used herein is meant all halogens, i.e., chloro, fluoro, bromo and iodo.

By the term "l-(NR6)-2-imidazolyl or 1-imidazolyl" or is meant

By the term "inhibiting the production of IL-l" or "inhibiting the production of TNF" is meant

SUBSTITUTE SHEET a) a decrease of excessive in vivo IL-1 or TNF levels, respectively, in a human to normal levels or below normal levels by inhibition of the in vivo release of IL- 1 by all cells, including but not limited to monocytes or macrophages; b) a down regulation, at the translational or transcription level, of excessive in vivo IL-1 or TNF levels, respectively, in a human to normal levels or below normal levels; or c) a down regulation, by inhibition of the direct synthesis of IL- 1 or TNF levels as a postranslational event.

By the term "TNF mediated disease or disease states" is meant any and all disease states in which TNF plays a role, either by production of TNF itself, or by TNF causing another cytokine to be released, such as but not limited to IL-1, or IL-6. A disease state in which IL-1, for instance is a major component, and whose production or action, is exacerbated or secreted in response to TNF, would therefore be considered a disease state mediated by TNF. As TNF-β (also known as lymphotoxin) has close structural homology with TNF-α (also known as cachectin) and since each induces similar biologic responses and binds to the same cellular receptor, both TNF-α and TNF- β are inhibited by the compounds of the present invention and thus are herein referred to collectively as "TNF" unless specifically delineated otherwise. Preferably TNF-α is inhibited.

By the term "cytokine" as used herein is meant any secreted polypeptide that affects the functions of cells, and is a molecule which modulates interactions between cells in the immune or inflammatory response. A cytokine includes, but is not limited to monokines and lymphokines regardless of which cells produce them. For instance, a monokine is generally referred to as being produced and secreted by a mononuclear cell, such as a macrophage and/or monocyte but many other cells produce monokines, such as natural killer cells, fibroblasts, basophils, neutrophils, endothelial cells, brain astrocytes, bone marrow stromal cells, epideral keratinocytes, and β- lymphocytes. Lymphokines are generally referred to as being produced by lymphoctye cells. Examples of cytokines for the present invention include, but are not limited to, Interleukin-1 (IL-1), Interleukin-6

(EL-6), Interleukin-8 (IL-8), Tumor Necrosis Factor-alpha (TNF-α) and Tumor Necrosis Factor beta (TNF-β).

The inhibition of a cytokine, contemplated by the present invention, for use in the treatment of a HIV-infected human, must be a cytokine which is implicated in (a) the initiation and/or maintenance of T cell activation and/or activated T cell-mediated HTV gene expression and/or replication, and/or (b) any cytokine-mediated disease associated problem such as cachexia or muscle degeneration. The cytokine specifically desired to be inhibited is TNF-α.

All of the compounds of Formula (I) are useful in the method of inhibiting the production of TNF, preferably by macrophages, monocytes or macrophages and monocytes in a human in need thereof. All of the compoimds of Formula (la) are useful in the method of inhibiting PDE IV and in treatment of disease states mediated thereby.

The mammal is preferably a human, afflicted with a disease state selected from endotoxic shock, adult respiratory distress syndrome, cachexia secondary to infection or malignancy, cachexia secondary to acute immune deficiency syndrome (AIDS), AIDS, reperfiision injury, pulmonary inflammatory disease, cerebral malaria, graft vs. host reaction, bone resorption diseases, rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis, eczema, psoriasis, sunburn, conjunctivitis, or pyresis.

METHODS OF PREPARATION:

Preparation of the compounds of Formula (I) can be carried out by one of skill in the art according to the procedures outlined in the Examples, infra. The preparation of any remaining compounds of Formula (I) not described therein may be prepared by the analogous processes disclosed herein which comprise: For compounds wherein R3 is other than CN and X is other than Br, I,

NO2 , amine, formyl amine or S(0)m' when m' is 1 or 2, reacting a compound of the Formula (2)

wherein Ri represents Ri as defined in relation to a compound of Formula (I) or a group convertible to Ri and X represents X as defined in relation to a compound of Formula (I) or a group convertible to X, with trimethylsilyl cyanide and a suitable catalyst, such as anhydrous zinc iodide, either neat or in the presence of a suitable non-reacting solvent, such as a halocarbon, at ambient temperature under an inert atmosphere. Upon complete formation of the intermediate trimethylsilyl cyanohydrin, the solvent, if present, is removed and the residue is reacted with the amine (NH2R4) , in which R4 represents R4 as defined in relation to a compound of Formula (0 or a group convertible to R4, in a suitable solvent, such as an alcohol, at about 40°C under an inert atmosphere in a sealed vessel to provide a compound of the Formula (3)

SUBSTITUTE SHEET

which may be converted to an appropriate acid salt form, such as a hydrochloride. Alternatively, compounds of Formula (3) may be prepared by a Strecker synthesis in which a compound of Formula (2) is reacted with sodium cyanide and the amine as its hydrochloride salt in an appropriate non-reacting solvent, such as an alcohol, at ambient temperature. Reaction of a compound of Formula (3) or its salt with a suitable alkyl or aralkyl haloformate, such as ethyl, benzyl or menthyl chloroformate, in a non-reacting solvent, such as methylene chloride, in the presence of an appropriate acid scavenger, such as saturated aqueous sodium bicarbonate, provides a compound of the Formula (4) in which Rg is alkyl, optionally substituted benzyl, or (-)-menthyl.

Reduction of the nitrile of a compound of Formula (4), wherein R_ is not optionally substituted benzyl, with, for example, hydrogen and a catalyst, such as Raney nickel catalyst in the presence of excess ammonia, provides a compound of Formula (5) in which R5 is H.

Cyclization of a compound of Formula (5) wherein R5 is H in the presence of an appropriate base, such as aqueous sodium hydroxide, in an appropriate solvent, such as an alcohol or dimethyl sulfoxide (DMSO), then provides a compound of Formula (I) wherein R5 is H and R3 is other than CN.

Alternatively, these compounds may be obtained by reduction of the nitrile of a compound of the Formula (3) with an appropriate reductant, such as lithium aluminum hydride in a non-reacting solvent, such as ethyl ether, THF, or hydrogen in

TITUTE SHEET the presence of a suitable catalyst, such as a noble metal or Raney nickel, in an alcoholic solvent to provide a diamine of the Formula (6) in which R5 is H

Reaction of a diamine of Formula (6) in which R5 is H, with phosgene in a solvent, such as toluene, at reduced temperature in the presence of an acid scavenger, such as saturated aqueous sodium bicarbonate, then provides these compounds of Formula (I) wherein R5 is H and R3 is other than CN; alternatively, use of N,N'- carbonyldϋmidazole or l,l-carbonyl-di-l,2,4-triazole in an appropriate solvent avoids the use of phosgene and acid scavenger to provide these compounds in comparable quantities.

Alternatively, selective protection of the α-NH in a compound of the Formula (6) wherein R5 is H, and R3 is not CN, with, for example, a t-butyloxy carbonyl or benzyloxy carbonyl group, followed by imine formation with the appropriate aldehyde and imine or imminium ion reduction as described below, followed by α-N protecting group removal, provides a compound of Formula (6) in which R5 is other than H and R3 is other than CN.

Reaction of the diamine of the compound of Formula (6) when R5 is other then H, as described above for the compound of Formula (6) when R5 is H, then provides the compound of Formula (I), in which R5 is other then H. For compounds of Formula (I) wherein R5 is OH are prepared by oxidation of the corresponding Formula (5) compound where R5 is H to an aldehyde oxime with, e.g., sodium tungstate and hydrogen peroxide at 0°C followed by reduction of the oxime intermediate with, e.g., sodium cyanoborohydride in presence of acid to give the corresponding Formula (5) compound wherein R5 is hydroxyl. Compounds of Formula (I) wherein R3 is CF3, CHF2 or CH2F, are prepared from the corresponding Formula (2) compounds using the methods described below. The Formula (2) compounds where R3 is CF3 are obtained by the method of Shono et al.. J. Ore. Chem., Vol. 56, pages 204 (1991) electrochemically from the Formula (2) compounds where R3 is H. Formula (2) compounds where R3 is CF3 or CHF2, are obtained by treatment of the Formula (2a) compound with a metalling agent at -78°C followed by trifluoroacetic acid or difluoroacetic acid by the method of Nad et al., Izvest, (1959) page formula (2a) compound with a metalling agent at -78 °C followed by trifluroacetic

SUBSTITUTE SHEET acid or difluroacetic acid by the method of Nad et al., Izvest, (1959) page 71; Chem.

Abstract., Vol. 53, No. 14877; and Vol. 53, No. 17933 (1959).

Formula (2a)

Formula (2) compound where R3 is CH2F are obtained by treatment of the Formula (2) compounds where R3 is CH3 according to the method of Rozen et al., Synthesis (6) 665, (1985).

Formula (2) compounds where X is R2S and R3 is H are prepared by alkylation of 3-hydroxy 4-nitrobenzaldehyde with the desired Ri-halide, where Rl is as described above, followed by treatment with sodium SR2 in DMF. Formula (2) compounds wherein X is F or Cl and R3 is H are prepared by alkylation of the (2-fluoro or chloro)-5-methyl phenol with the desired Ri-halide, followed by formation of the benzyl bromide with N-bromo succinimide and subsequent transformation to the required aldehyde with 2-nitropropane and sodium ethoxide in ethanol. Novel Formula (2) compounds where R3 is CH3 can be made by addition of a methyl metal to the Formula (2) compounds where R3 is hydrogen, followed by oxidation, e.g. with pyridinium dichromate.

For compounds of Formula (I) wherein RiO and X are as described in Formula (I) are prepared by alkylation of the corresponding Formula (2) compounds where either both of Rl and R2 (where X is YR2) are hydrogen with a base, e.g. a metal carbonate, metal hydroxide, metal hydride, and an alkylating agent Q-L, where Q is Rl or R2 as described above and L is an appropriate leaving group known in the art, e.g. Cl, Br, I, tosyl, mesyl, or triflyl or with a fluorinated ethylene, e.g. tetrafluoroethylene. Alternatively the Formula (I) compounds may be prepared from other

Formula (I) compounds where Ri and/or R2 are protecting groups, such as benzyl or methoxymethyl, ethoxymethyl or acetonide, and are removed by methods well known in the art and subsequently alkylated as described above for the Formula (2) compounds. For compounds of Formula (I) wherein X is amine, monoakylamine or formylamine, such alkylation is performed on Formula (2) or protected R1/R2 Formula (I) compounds, where X is nitro or a protected amine, e.g., a mono-or di-N-t- butoxycarbonyl or a mono- or di-N-benzyloxycarbonyl, and the protecting group removed subsequently by methods known to those skilled in the art

For those compounds of the Formula (I) in which R3 is other than CN, when X is other than Br, I, NO2, amine, formyl amine or S(0)_m' and m' is 1 or 2, and

ET R5 is other than H, reaction of an amine of the Formula (5) wherein R5 is H with a suitably substituted aryl or alkyl aldehyde in a suitable solvent, such as chloroform at reflux temperature, followed by suitable acid salt formation, such as a hydrochloride or acetate, and reduction of the iminium salt with, for example, sodium cyanoborohydride in methanol, provides a compound of the Formula (5) in which R3 is other than CN and R5 is other than H; alternatively nobel metal catalytic reduction of the imine or iminium function may also be employed. For most of these compounds, cyclization as described above provides compounds of Formula (I) in which R5 is other than H. In the case of certain compounds of Formula (5) which contain a base-sensitive functionality in R5, such as a nitro group, conversion to a base stable functionality, such as an amine, is conducted prior to cyclization; such amines may then be functionalized as desired.

For those compounds of Formula (I) in which R3 is CN, and X is other than Br, I, NO2 or formyl amine, a sequence beginning with reaction of a compound of the Formula (2) wherein R3 is H with a lithium halide and a silyl halide in an appropriate solvent followed by reduction with an appropriate reductant, such as a siloxane, provides a compound of the Formula (7) wherein Xi is a halide. Alternatively, reduction of a compound of the Formula (2) wherein R3 is H with a suitable reductant, such as sodium borohydride, provides a compound of the Formula (7) wherein Xi is OH. Reaction of such a compound of the Formula (7) with, for example, phosphorous trichloride, thionyl chloride, phosphorous tribromide, cupric bromide or carbon tetrabromide and triphenylphosphine, also provides a compound of the Formula (7) wherein Xi is a halide;

halide displacement by cyanide provides a compound of the Formula (8) wherein R3 and R91S H

which is allowed to react with a strong base, such as LD A or an alkyl lithium or lithium hexamethyldisilazide, at reduced temperature under an inert atmosphere followed by reaction with, for example, trimethylsilyl isocyanate and appropriate workup to produce a compound of Formula (8) wherein R3 is CONH2 and R9 is H; or followed by reaction with for example an alkyl or aryl haloformate, such as methyl chloroformate, to produce

TUTE SHEET a compound of Formula (8) wherein R3 is COORs and R9 is H; this COORg group of such a compound may be transformed either at this stage or at a later stage to a CONH2 group by any of the standard techniques well known to those skilled in the art. Alternatively, a compound of Formula (8) wherein R3 is COOR8 and R9 is H may also be obtained by reaction of a compound of Formula (8) wherein R3 and R9 are H with a metal hydride, such as sodium or potassium hydride, at ambient or elevated temperature under an inert atmosphere in the presence of an alkyl or aryl dicarbonate, for example methyl dicarbonate. Also a compound of Formula (2) wherein R3 is H may be homologated to a compound of the Formula (7) wherein Xi is COOR4 by any number of known processes, such as reaction with a methyl methyl sulfinylmethyl sulfide and a base, such as sodium hydroxide, followed by treatment with, for example, alcoholic acid; generation of an anion of a compound of Formula (7) wherein Xi is COOR4 with a suitable base, followed by reaction with, for example, cyanogen chloride or 2- chlorobenzyl thiocyanate, provides a compound of Formula (8) wherein R3 is COOR4 and R9 is H.

Generation of a third anion with the appropriate base in an appropriate solvent followed by reaction with, e.g. 2,4,6-triisopropyl-benzenesulfonyl azide or other electrophilic source of azide, produces a compound of the Formula (8) wherein R3 is CONH2 and R9 is N3. Reduction of both the azido and nitrile moieties by, for example, hydrogenation with a noble metal or Raney nickel catalyst provides a compound of the Formula (6) wherein R4 is H and R3 is CONH2. Cyclization of this diamine as described above followed by amide dehydration, with for example, rrifluoroacetic anhydride provides a compound of the Formula (I) wherein R4 and R5 are H and R3 is CN. Alternatively, for a compound of the Formula (8) wherein R3 is CONH2 and R9 is N3, selective reduction of the azido moiety to an amine, using e.g., catalytic hydrogenation with 10% palladium on carbon and one equivalent of acetic acid or alternatively tiiphenyl phosphine in a suitable solvent such as tetrhydrofuran/water, followed by reaction with a suitable alkyl or aralkyl haloformate as described above produces a compound of the Formula (4) wherein R4 is H and R3 is CONH2. Nitrile reduction as described above provides a compound of the Formula (5) wherein R4 and R- are H and R3 is CONH2. Cyclization of the ring and dehydration of the R3 amide to a nitrile then provides a compound of the Formula I wherein R4 and R5 are H and R3 is

CN. Alternatively, the ami o moiety of a compound of the Formula (5) wherein R4 and R5 are H and R3 is CONH2 may be suitably protected, e.g. with a carbobenzyloxy or t-butyloxycarbonyl group, prepared as known in the art, dehydration

ITUTE SHEET of the R3 amide to the nitrile is conducted, and the amine deprotected, by methods well known to those skilled in the art, to provide a compound of the Formula (5) wherein R4 and R5 are H and R3 is CN. The amine moiety of such a compound of Formula (5) may be homologated as described above to provide a compound of the Formula (5) wherein R- is other than H. Cyclization followed by any appropriate functional group manipulations (such as reductions, acylations, deprotections, oxidations, etc.) then provides a compound of the Formula (I) wherein R3 is CN, R4 is H and R5 is other than H.

Compounds of Formula (I) may be prepared from other Formula (T) compounds and functionally modified, as known in the art, e.g. where R4 is O-acetate, by acetylation from R4 as hydroxyl. Compounds where R5 is (CH2)qAr or C2-6 alkyl substituted by: NO2 from the NH2 derivative by oxidation, e.g. with a peracid; C(0)NR6R7 from the -CO2CH3 by heating with or without catalytic metal cyanide, e.g. NaCN, and HNR6 7 in CH3OH; -OC(0)R6 from the -OH with e.g.,ClC(0)R6 in pyridine; -NR6-C(S)NR6R7 from -NHRβ with an alkylisothiocyante or thiocyanic acid;

NR6C(0)OR6 from -NHR6 with the alkyl chloroformate; -NR6C(0)NR6R7 from the - NHR6 by treatment with an isocyanate, e.g. HN=C=0 or R6N=C=0; -NR6-C(0)R6 from the -NHR6 by treatment with C1-C(0)R6 in pyridine; -C(=NR6)NR6R7 from - C(NR6R7)SR6 with H3NR6⁺OAc" by heating in alcohol; -C(NR6R7)SR6 from - C(S)NR6R7 with R6-I in an inert solvent, e.g. acetone; -C(S)NR6R7 where Rβ or R7 is not hydrogen from C(S)NH2 with HNR6R7, C(=NCN)-NR6R7 from -C(=NR6R7)- SR6 with NH2CN by heating in anhydrous alcohol, alternatively from C(=NH)-NR6R7 by treatment with Br-CN and NaEtO- in EtOH; NR6-C(=NCN)SR6 from NHR6 by treatment with (ReS)2C=NCN; -NR6SO2R6 from NHR6 by treatment with CISO2R6 by heating in pyridine; -NR_$C(S)R6 from -NR6C(0)R6 by treatment with Lawesson's reagent [2,4-bis(4-methoxyphenyl)-l,3,2,4-dithiadiphosphetane-2,4-disulfide]; - NR6SO2CF3 from NHR6 with triflic anhydride and base; NR6C(0)-C(0)-OR6 from - NHRβ with, e.g. methyloxalyl chloride and a base such as triethylamine; -NR6C(0)-C(0)-NR6R7 from -NR6C(0)-C(0)-OR6 with HNR6R7; l-(NR6)-2- imidazolyl from -C(=NH)NHR6 by heating with 2-chloroacetaldehyde in chloroform.

For compounds wherein X is S(0)m'-Ci-6 alkyl, and m is 1 or 2 the final compound is made from the -S-Ci-6 alkyl moiety by oxidizing the intermediate -S-alkyl product with, e.g. a peracid such as 3-chloroperbenzoic acid, under conditions well known those skilled in the art, after the CONH2 moiety in synthesis step (c) is dehydrated to the cyano moiety. For compounds wherein X is Br, I, NO2, amine or formyl amine synthesis of these compounds is accomplished by any of the steps described above using a suitably protected amine. Such protecting groups are known to those skilled in the art

SUBSTITUTE SHEET and are readily disclosed in Greene, T., Protective Groups in Organic Synthesis. Wiley Publishers, NY (1981), the contents of which are hereby incorporated by reference.

In particular, for Compounds of Formula (1) wherein X is formyl amine are formed at the last step, by formylating a compound wherein X is NH2, obtained by removal of a protecting group from the amine functionality. Use of the deprotected amine in many instances allows for appropriately acylating the moiety to the NHCHO moiety, or oxidizing it to the NO2 moiety; diazotization and displacement by methods well known to those skilled in the art produces the desired Br or I moiety. For instance, compounds of Formula CO wherein X is Br or I may be prepared using the techniques of PCT/US91/04795 on a similarly deprotected amine, diazotization of the amine, and diazonium displacement; or for compounds of Formula (I) wherein X is NO2 may be prepared using the techniques of PCT/US91/04795 on a similarly deprotected amine by oxidation of the amine to the nitro group.

METHODS OF TREATMENT

In order to use a compound of the Formula (I) or a pharmaceutically acceptable salt thereof for the treatment of humans and other mammals it is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition. The compounds of Formula (I) or a pharmaceutically acceptable salt thereof can be used in the manufacture of a medicament for the prophylactic or therapeutic treatment of any disease state in a human, or other mammal, which is exacerbated or caused by TNF production by such human's cell, such as but not limited to monocytes and/or macrophages, especially caused by excessive or unregulated TNF production. The compounds of Formula (I) are administered in an amount sufficient to inhibit TNF production such that it is regulated down to normal levels, or in some case to subnormal levels, so as to ameliorate or prevent the disease state. Abnormal levels of TNF, for the present invention, constitute levels of 1) free (not cell bound) TNF, greater than or equal to 1 picogram per ml; 2) any cell associated TNF; or 3) the presence of TNF mRNA above basal levels in cells or tissues in which TNF is produced.

The compounds of Formula (la), or a pharmaceutically acceptable salt thereof can be used in the manufacture of a medicament for the prophylatic or therapeutic treatment of any disease state, in a human, or other mammal, which is mediated by inhibition of PDE IV, such as but not limited to asthma, allergic or inflammatory diseases. The compounds of Formula (la) are administered in an amount sufficient to treat such a disease in a human or other mammal.

UBSTITUTE SHEET No unacceptable toxicological effects are expected when compounds of the invention are administered in accordance with the present invention.

The compounds of Formula (I) may be used in the treatment of any disease states mediated by excessive or unregulated TNF production, such as but not limited to rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis and other arthritic conditions; sepsis, septic shock, endotoxic shock, gram negative sepsis, toxic shock syndrome, adult respiratory distress syndrome, cerebral malaria, chronic pulmonary inflammatory disease, silicosis, pulmonary sarcoisosis, bone resorption diseases, reperfiision injury, graft vs. host reaction, allograft rejections, fever and myalgias due to infection, such as influenza, cachexia secondary to infection or malignancy, cachexia, secondary to acquired immune deficiency syndrome (AIDS), AIDS, ARC (AIDS related complex), keloid formation, scar tissue formation, Crohn's disease, ulcerative colitis, pyresis, AIDS and other viral infections, such as cytomegalia virus (CMV), influenza virus, and the herpes family of viruses. The compounds of Formula (I) may also be used topically as well in the treatment or prophylaxis of inflammatory topical disease states mediated or exacerbated by excessive TNF production respectively, such as for rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis and other arthritic conditions, inflamed joints, eczema, psoriasis or other inflammatory skin conditions such as sunburn; inflammatory eye conditions including conjunctivitis; pyresis, pain and other conditions associated with inflammation.

The compounds of Formula (I) may also be used in association with the veterinary field for treatment of TNF mediated diseases such as viral infections. Examples of such viruses include but are not limited to, feline immunodeficiency virus (FTV) or other retroviral infection such as equine infectious anaemia virus, caprine arthritis virus, visna virus, maedi virus and other lentiviruses.

It further appears that among the cytokines, while TNF production precedes and augments the function of D -1 and other cytokines, there is no clear data on how the relationship among these molecules contributes to inflammation-related disease states. The present invention attributes many of the biological disease states attributable to interleukin-1 (IL-1) activity as being attributable to that of TNF activity as well. A comprehensive listing of IL-1 activities can be found in Dinarello, J. Clinical Immunology.5 (5), 287-297 (1985). It should be noted that some of these effects have been described by others as indirect effects of IL-1. The myriad of known biological activities of IL-1 include the activation of T helper cells, induction of fever, stimulation of prostaglandin or collagenase production, neutrophil chemotaxis, induction of acute phase proteins and the suppression of plasma iron levels. These disease states are also

SUBSTITUTE SHEET considered appropriate disease states of TNF activity and hence compounds of Formula (I) are also useful in their treatment as well, and the use of the compounds of Formula (I) should not be considered solely limited to the specifically described TNF mediated disease states herein. The compounds of Formula (I) should be efficacious in an B -1 mediated disease state as TNF and B -1 act in a synergistic manner. TNF as well mediates the release, in some instances, of IL-1, therefore a reduction in the levels of TNF may be useful in the treatment of a disease state wherein IL-1 is a major component. The present invention relates therefore, to an effective, TNF production inhibiting amount of a compound of Formula (I) or a pharmaceutically acceptable salt thereof is useful in treating, prophylactically or therapeutically, any disease state in a human which is exacerbated or caused by excessive or unregulated IL-1 production, i.e., where IL-1 is a major component, by such human's monocytes and/or macrophages.

The method of treatment and monitoring for an HIV-infected human manifesting immune dysfunction or cytokine-mediated disease associated problems is taught in Hanna, WO 90/15534, December 27, 1990. In general, an initial treatment regimen can be copied from that known to be effective in interfering with TNF activity for other TNF mediated disease states by the compounds of Formula (1). Treated individuals will be regularly checked for T cell numbers and T4 T8 ratios and/or measures of viremia such as levels of reverse transcriptase or viral proteins, and/or for progression of πionokine-mediated disease associated problems such as cachexia or muscle degeneration.

If no effect is seen following the normal treatment regimen, then the amount of the monokine activity interfering agent administered is increased, e.g., by fifty percent per week.

The compounds of Formula (I) may be administered orally (when active by this route), topically, parenterally or by inhalation in conventional dosage forms prepared by combining such agent with standard pharmaceutical carriers according to conventional procedures in an amount sufficient to produce the desired therapeutic activity for treatment of a TNF mediated disease state or in the case of a compound of Formula (la) in their use as a PDE IV inhibitor. In order to use a compound of the Formula (I) or a pharmaceutically acceptable salt thereof for the treatment of humans and other mammals it is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition,

The pharmaceutical composition of the present invention will comprising an effective, non-toxic amount of a compound of Formula (I) and a pharmaceutically acceptable carrier or diluent. The compounds of Formula (I) are administered in conventional dosage forms prepared by combining a compound of Formula (I) in an

SHEET amount sufficient.to produce TNF production inhibiting activity, respectively, with standard pharmaceutical carriers according to conventional procedures. These procedures may involve mixing, granulating and compressing or dissolving the ingredients as appropriate to the desired preparation. The pharmaceutical carrier employed may be, for example, either a solid or liquid. Exemplary of solid carriers are lactose, terra alba, sucrose, talc, gelatin, agar, pectin, acacia, magnesium stearate, stearic acid and the like. Exemplary of liquid carriers are syrup, peanut oil, olive oil, water and the like. Similarly, the carrier or diluent may include time delay material well known to the art, such as glyceryl monostearate or glyceryl distearate alone or with a wax.

Compounds of Formula (J) and their pharmaceutically acceptable salts (when possible), some of which are orally active, can be employed in a wide variety of pharmaceutical forms. The preparation of a pharmaceutically acceptable salt will be determined by the nature of the compound itself, and can be prepared by conventional techniques readily available to one skilled in the art. Thus, if a solid carrier is used, the preparation can be tableted, placed in a hard gelatin capsule in powder or pellet form or in the form of a troche or lozenge. The amount of solid carrier will vary widely but preferably will be from about 25 mg to about 1 gram. When a liquid carrier is used, the preparation will be in the form of a syrup, emulsion, soft gelatin capsule, sterile injectable liquid such as an ampule or nonaqueous liquid suspension. Where the composition is in the form of a capsule, any routine encapsulation is suitable, for example using the aforementioned carriers in a hard gelatin capsule shell. Where the composition is in the form of a soft gelatin shell capsule any pharmaceutical carrier routinely used for preparing dispersions or suspensions may be considered, for example aqueous gums, celluloses, silicates or oils and are incorporated in a soft gelatin capsule shell. A syrup formulation will generally consist of a suspension or solution of the compound or salt in a liquid carrier for example, ethanol, glycerine or water with a flavouring or colouring agent.

The amount of a compound of Formula (I) required for therapeutic effect on topical administration will, of course, vary with the compound chosen, the nature and severity of the condition and the animal undergoing treatment, and is ultimately at the discretion of the physician.

By systemic administration is meant oral, intravenous, intraperitoneal and intramuscular administration. By topical administration is meant non-systemic administration and includes the application of a compound externally to the epidermis, to the buccal cavity

SUBSTITUTE SHEET and instillation of such a compound into the ear, eye and nose, and where the compound does not significantly enter the blood stream.

The term 'parenteral' as used herein includes intravenous, intramuscular, subcutaneous intranasal, intrarectal, intravaginal or intraperitoneal administration. The subcutaneous and intramuscular forms of parenteral administration are generally preferred. Appropriate dosage forms for such administration may be prepared by conventional techniques.

Typical parenteral compositions consist of a solution or suspension of the compound or salt in a sterile aqueous or non-aqueous carrier optionally containing a parenterally acceptable oil, for example polyethylene glycol, polyvinylpyrrolidone, lecithin, arachis oil, or sesame oil. The daily dosage regimen for inhibition of TNF production, via parenteral administration is suitably about 0.001 mg Kg to 40 mg/Kg, for example about 0.001 mg/Kg to 40 mg Kg, of a compound of the Formula (I) or a pharmaceutically acceptable salt thereof calculated as the free base. The compounds of Formula (I) may be administered orally. Each dosage unit for oral administration contains suitably from 1 mg to 100 mg, and preferably from 10 mg to 30 mg of a compound of Formula (I) or a pharmaceutically acceptable salt thereof calculated as the free base.

The daily dosage regimen for oral administration is suitably about .001 mg/kg to lOOmg kg, preferably 0.01 mg Kg to 40 mg Kg, of a compound of Formula

(I) or a pharmaceutically acceptable salt thereof calculated as the free base. The active ingredient may be administered from 1 to 6 times a day, sufficient to exhibit activity.

The compounds of Formula (I) may also be administered by inhalation. By "inhalation" is meant intranasal and oral inhalation administration. Appropriate dosage forms for such administration, such as an aerosol formulation or a metered dose inhaler, may be prepared by conventional techniques. The daily dosage regimen for a compound of Formula (I) for intranasal administration and oral inhalation is suitably about 10 to about 1200 mg.

Typical compositions for inhalation are in the form of a solution, suspension or emulsion that may be administered as a dry powder or in the form of an aerosol using a conventional propellant such as dichlorodifluoromethane or trichlorofluoromethane.

Preferably the composition is in unit dosage form, for example a tablet, capsule or metered aerosol dose, so that the patient may administer to himself a single dose.

The compounds of Formula (I) may also be administered topically. Thus, the compounds of Formula (I) may be administered topically in the treatment or prophylaxis of inflammatory topical disease states mediated or exacerbated by excessive TNF production, respectively, such as rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis and other arthritic conditions, inflamed joints, eczema, psoriasis or other inflammatory skin conditions such as sunburn; inflammatory eye conditions including conjunctivitis; pyresis, pain and other conditions associated with inflammation.

A suitable dose of a TNF production inhibiting compound of Formula (T) is from about .01 mg to about 100 mg of base for topical administration, the most preferred dosage being about .01 mg to about 30 mg, for example, .003 mg to 10 mg administered two or three times daily.

While it is possible for an active ingredient to be administered alone as the raw chemical, it is preferable to present it as a pharmaceutical formulation. The active ingredient may comprise, for topical administration, from 0.001% to 10% w/w, e.g. from 1% to 2% by weight of the formulation although it may comprise as much as 10% w/w but preferably not in excess of 5% w/w and more preferably from 0.1 % to 1% w/w of the formulation.

The formulations of the present invention comprise an active ingredient together with one or more acceptable carriers) therefor and optionally any other therapeutic ingredients). The carrier(s) must be 'acceptable' in the sense of being compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.

Formulations suitable for topical administration include liquid or semi- liquid preparations suitable for penetration through the skin to the site of inflammation such as liniments, lotions, creams, ointments or pastes, and drops suitable for administration to the eye, ear or nose.

Drops according to the present invention may comprise sterile aqueous or oily solutions or suspensions and may be prepared by dissolving the active ingredient in a suitable aqueous solution of a bactericidal and or fungicidal agent and/or any other suitable preservative, and preferably including a surface active agent. The resulting solution may then be clarified by filtration, transferred to a suitable container which is then sealed and sterilized by autoclaving or maintaining at 98-100°C.for half an hour. Alternatively, the solution may be sterilized by filtration and transferred to the container by an aseptic technique. Examples of bactericidal and fungicidal agents suitable for inclusion in the drops are phenylmercuric nitrate or acetate (0.002%), benzalkonium chloride (0.01%) and chlorhexidine acetate (0.01%). Suitable solvents for the preparation of an oily solution include glycerol, diluted alcohol and propylene glycol.

BSTITUTE SHEET Lotions according to the present invention include those suitable for application to the skin or eye. An eye lotion may comprise a sterile aqueous solution optionally containing a bactericide and may be prepared by methods similar to those for the preparation Of drops. Lotions or liniments for application to the skin may also include an agent to hasten drying and to cool the skin, such as an alcohol or acetone, and/or a moisturizer such as glycerol or an oil such as castor oil or arachis oil.

Creams, ointments or pastes according to the present invention are semi- solid formulations of the active ingredient for external application. They may be made by mixing the active ingredient in finely-divided or powdered form, alone or in solution or suspension in an aqueous or non-aqueous fluid, with the aid of suitable machinery, with a greasy or non-greasy basis. The basis may comprise hydrocarbons such as hard, soft or liquid paraffin, glycerol, beeswax, a metallic soap; a mucilage; an oil of natural origin such as almond, corn, arachis, castor or olive oil; wool fat or its derivatives, or a fatty acid such as steric or oleic acid together with an alcohol such as prolylene glycol or macrogols. The formulation may incorporate any suitable surface active agent such as an anionic, cationic or non-ionic sulfactant such as sorbitan esters or polyoxyethylene derivatives thereof. Suspending agents such as natural gums, cellulose derivatives or inorganic materials such as silicaceous silicas, and other ingredients such as lanolin, may also be included. It will be recognized by one of skill in the art that the form and character of the pharmaceutically acceptable carrier or diluent is dictated by the amount of active ingredient, with which it is to be combined, the route of administration and other well- known variables.

It will be recognized by one of skill in the art that the optimal quantity and spacing of individual dosages of a compound of Formula (I) or a pharmaceutically acceptable salt thereof will be determined by the nature and extent of the condition being treated, the form, route and site of administration, and the particular patient being treated, and that such optimums can be determined by conventional techniques. It will also be appreciated by one of skill in the art that the optimal course of treatment, i.e., the number of doses of a compound of Formula (I) or a pharmaceutically acceptable salt thereof given per day for a defined number of days, can be ascertained by those skilled in the art using conventional course of treatment determination tests.

UTILITY EXAMPLES Example A

Inhibitory Effect of compounds of Formula (I) on in vitro TNF production by Human Monocytes The inhibitory effect of compounds of Formula (I) on in vitro TNF production by Human Monocytes can be determined by the protocol as described in Badger et al.. EPO published Application 0411 754 A2, February 6, 1991, and in Hanna, WO 90/15534, December 27, 1990. The compounds of Formula ⁽ ) displayed an IC50 value of 0.01- to about >3.0 for Inhibition of LPS-Induced Human Monocyte TNF Production in the above noted assay. For instance, 4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone demonstrated an IC50 of .2μM in the in-vitro assay system described above.

UTILΠΎ EXAMPLE B

MODEL A Two models of endotoxin shock have been utilized to determine in vivo TNF activity for the compounds of Formula (1). The protocol used in these models is described in Badger et al.. EPO published Application 0411754 A2, February 6, 1991, and in Hanna, WO 90/15534, December 27, 1990.

4-(3-cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone demonstrated a positive in-vivo response of about 57 % reduction in serum levels of TNF which were induced by the injection of endotoxin.

The data shown herein demonstrate that the compounds of the present invention inhibit TNF production in a mammal. Therefore, the compounds of Formula Q) are useful in inhibiting the production of tumor necrosis factor (TNF) by monocytes or macrophages in a human.

UΠLΓΓY MODEL B The phosphodiesterase inhibitory activity and selectivity of the compounds of

Formula (la) can be determined using a battery of five distinct PDE isozymes. The tissues used as sources of the different isozymes are as follows: 1) PDE la, canine trachealis; 2) PDE lb, porcine aorta; 3) PDE Ic, guinea-pig heart; 4) PDE HI, guinea-pig heart; and 5) PDE IV, human monocyte. PDEs la, lb, Ic and III are partially purified using standard chromatographic techniques (Toiphy and Cieslinski, Mol. Pharmacol.37:

206-214, 1990). PDE IV is purified to kinetic homogeneity by the sequential use of anion-exchange followed by heparin-Sepharose chromatography (White et al.. FASEB J. 4: A1987 1990).

Phosphodiesterase activity is assayed as described in the protocol of Torphy and Qeslinski, Mol. Pharmacol. 37: 206-214, 1990. ICso's for compounds of

Formula (la) range from 0.1 μM to 30 μM.

SUBSTITUTE SHEET UTILΠΎ MODEL C The ability of selected PDE IV inhibitors to increase cAMP accumulation in intact tissues is assessed using U-937 cells, a human monocyte cell line that has been shown to contain a large amount of PDE IV. To assess the activity of PDE IV inhibition in intact cells, nondifferentiated U-937 cells (approximately 10-5 cells reaction tube) were incubated with various concentrations (0.01-100 μM) of PDE inhibitors for one minute and lμM prostaglandin E2 for an additional four minutes. Five minutes after initiating the reaction, cells were lysed by the addition of 17.5% perchloric acid, the pH was neutralized by the addition of 1M potassium carbonate and cAMP content was assessed by RIA . A general protocol for this assay is described in Brooker et al., Radioimmunassay of cyclic AMP and cyclic GMP., Adv. Cyclic Nucleotide Res., 10:1-33, 1979. ECso's for compounds of Formula (la) range from 0.3 μM to >10 μM.

S YNTHETIC EXAMPLES

The following examples are illustrative and are not limiting of the compounds of this invention.

EXAMPLE 1 4-(3-Cvclopentyloxy-4-methoxyphenyl^')-2-imidazolidinone

A) 2-Amino-2-(3-cvclopentyloxy-4-methoxyphenyl)acetonitrile hydrochloride.

A mixture of 3-cyclopentyloxy-4-methoxybenzaldehyde (10.0 g, 45.4 mmol), trimethylsilylcyanide (7.6 ml, 57 mmol) and a trace of anhydrous zinc iodide under an argon atmosphere was stirred at room temperature. After 30 min, a cold solution of anhydrous ammonia in methanol (6.2 M, 36 ml, 223 mmol) was added and the mixture was heated in a sealed reaction vessel at 40°C for 3 hours. The vessel was vented and the liquids were removed in vacuo. The resulting oil was redissolved in methanol, concentrated hydrochloric acid (5 ml, 60 mmol) and ether were added to produce a solid, which was washed well with ether and dried to produce the hydrochloride salt of 2- amino-2-(3-cyclopentyloxy-4-methoxyphenyl)acetonitrile as an off-white powder (11.8 g, 92%): m.p. 164-166°C (dec).

Analysis Calc. for C14H ₈N2θ2.HCl : C 59.47, H 6.77, N 9.91; found: C 59.30, H 6.91, N 9.87.

SUBSTITUTE SHEET B) 2-Ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxy-phenvDacetonitιile. 2-Amino-2-(3-cyclopentyloxy-4-methoxyphenyl)acetonitrile hydrochloride (2.83 g, 10 mmol) was suspended in saturated aqueous sodium bicarbonate (25 ml) and methylene chloride (25 ml) was added. The mixture was stirred vigorously under an argon atmosphere until all solid dissolved and then ethyl chloroformate (1.9 ml, 19.9 mmol) was added in one portion. Additional ethyl chloroformate (0.5 ml, 5.2 mmol) was added at 1, 2 and 3 hours. After 4 hours, the mixture was partitioned, the methylene chloride was washed with dilute hydrochloric acid and dried (potassium carbonate). Recrystallization from ether/hexanes provided a solid of the title compound (3.0 g, 93%): m.p. 100-101°C.

Analysis Calc. for C17H22N2O4: C 64.13,

H 6.97, N 8.80; found: C 63.89, H 7.04, N 8.72. .

C) 2-Ethoxycarbonylamino-2-(3-cvclopentyloxy-4-methoxyphenyl)ethylamine. 2-Ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)acetonitrile (3.0 g,9.4 mmol) and concentrated ammonium hydroxide (2.5 ml) were added to a suspension of Raney nickel (3.0 ml of 50% suspension in water, washed three times with ethanol) in ethanol (70 ml). The mixture was hydrogenated at 60 psi for 3 hours, diluted with methylene chloride, filtered through celite and evaporated. The residue was partitioned between methylene chloride and dilute aqueous hydrochloric acid and the organic layer was discarded. The aqueous layer was basified with saturated aqueous sodium carbonate, extracted with methylene chloride and dried (potassium carbonate). Solvent evaporation provided 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4- methoxyphenyl)ethylamine (3.0 g, 100%): m.p.79-84°C. Analysis Calc. for C17H26N2O4 -1/8 H₂0: C 62.89, H 8.15, N 8.63; found: C

62.70, H 8.17, N 8.47.

D) 4-(3-C clopentyloxy-4-methoxyphenyl)-2-imidazolidinone.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)- ethylamine (40 mg, 0.12 mmol) in ethanol (1 ml) and aqueous sodium hydroxide (2.5

N, 0.5 ml) under an argon atmosphere was heated at reflux for 5 hours. The mixture was cooled and partitioned between ether and water. The ether layer was washed with dilute acid, dried (potassium carbonate) and evaporated to a solid of 4-(3- cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone (16 mg,48%): m.p. 116-118°C. Analysis Calc. for C15H20N2O3: C 65.20,

H 7.30, N 10.14; found: C 65.04, H 7.19, N 10.28.

SUBSTITUTE SHEET EX AMPLE 2 l-(-4-AminobenzylV4-(3-cvclopentyloxy-4-methoxypheny -2-imidazolidinone

A) 2-Ethoxycarbonylamino-2-(3-cvclopentyloxy-4-methoxyphenyl)-l-(4- nitrobenzylamino^'.ethane.

A solution of 2-ethoxycarbonylammo-2-(3-cyclopentyloxy-4-memoxyphenyl)ethylamine (1.25 g, 3.9 mmol), prepared as in Example 1, and 4-nitrobenzaldehyde (0.59 g, 3.9 mmol) in chloroform under an argon atmosphere was heated at reflux for 2 hours. The mixture was cooled, the solvent was removed in vacuo and a solution of anhydrous hydrochloric acid in ether (1.0 M, 4 ml) was added. The solution was evaporated to dryness, the residue was redissolved in absolute methanol and sodium cyanoborohydride (0.25 g, 4.0 mmol) was added. The mixture was stirred at room temperature for 2 hours, partitioned between methylene chloride and saturated sodium bicarbonate and the organic layer dried (potassium carbonate). The residue was purified by flash chromatography, eluting with ether to provide a solid of 2- ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(4- nitrobenzylamino)ethane. (0.7 g, 40%): m.p. 112-113°C.

B) l-(4-Aminobenzyl)-4-(3-cvclopentyloxy-4-methoxyphenyl)-2-imidazolidinone.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(4- nitro-benzylamino)ethane (0.4 g, 0.9 mmol) in acetic acid (2.5 ml) and water (2.5 ml) was treated with an aqueous solution of titanium trichloride (20%, 4.5 ml). After 15 min, concentrated ammonium hydroxide (6 ml) and 9:1 methylene chloride/methanol were added and the mixture was filtered through a glass fiber filter. The methylene chloride layer was separated and dried (sodium sulfate). The solvent was evaporated The residue (0.31 g) in ethanol (10 ml) and aqueous sodium hydroxide (2.5 M, 5 ml) was heated at reflux for 5 hours. The mixture was cooled, partitioned between methylene chloride and water and the aqueous layer extracted with both methylene chloride and ether. The combined organic layers were dried (potassium carbonate) and evaporated The residue was purified by recrystallization from methylene chloride/ether to provide a solid of l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone (0.22 g, 66%): m.p. 127-128°C. Analysis Calc. for C22H27N3O3: C 69.27,

H 7.13, N 11.02; found: C 69.51, H 7.23, N 11.16.

SUBSTITUTE SHEET EXAMPLE 3 4-G-([ clor)entyloxy* -methoxyphenyl)-l-f4-dimethylaminobenzylV2-imidazolidinone.

A) 2-Ethoxycarbonylamino-2-(3-cvclopentyloxy-4-methoxy-phenyl -l-(4- dimethylaminobenzylamino^'ethane.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4- methoxyphenyl)ethylamine, prepared as in Example 1, (0.725 g, 2.25 mmol) and 4- dimethylamino-benzaldehyde (0.34 g, 2.25 mmol) in chloroform under an argon atmosphere was heated at reflux for 2 hours and the solvent was removed by distillation. Additional chloroform (10 ml) was added and reflux was continued for an additional hour. The mixture was cooled, the solvent was removed in vacuo. the residue was redissolved in tetrahydrofuran (15 ml) and a solution of anhydrous hydrochloric acid in ether (1.0 M, 5 ml) was added. The solution was evaporated to dryness, the residue was redissolved in absolute methanol (10 ml), cooled to 0°C and sodium cyanoborohydride (0.28 g, 4.5 mmol) was added. The mixture was allowed to warm to room temperature and stirred overnight. The colorless mixture was partitioned between methylene chloride and 10% sodium hydroxide and the organic layer dried (potassium carbonate). The residue was purified by flash chromatography, eluting first with ether and then with 5% methanol/ether to provide a solid of the title compound (0.82 g, 80%): m.p. 94-96°C.

B) 4-(3-Cvclopentyloxy-4-methoxyphenyl^')-l-(4-dimethylaminobenzyπ-2- imidazolidinone.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(4- dimethylaminobenzylamino)ethane (0.40 g, 0.88 mmol) in ethanol (10 ml) and aqueous sodium hydroxide (2.5 M, 1 ml) was heated at reflux under an argon atmosphere for 6 hours. The mixture was cooled, partitioned between methylene chloride and water and the aqueous layer extracted with methylene chloride. The organic layer was dried (potassium carbonate) and evaporated. The residue was purified by flash chromatography, eluting with 2% methanol/methylene chloride, and the resulting solid was purified by recrystallization from chloroform/ether to provide a solid of the title compound (0.29 g, 80%): m.p. 171-172°C.

Analysis Calc. for C24H31N3O3 • 3/8 H2O: C 69.25, H 7.69, N 10.09; found: C 69.29, H 7.50, N 9.95.

SUBSTITUTE SHEET EXAMPLE4 l-(4-Acetamidobenzyl)-4-(3-cvclopentyloxy-4-methoxyphenylV2-imidazolidinone

A) l-(4-Acetamidobenzylamino)-2-(3-cyclopentyloxy-4-methoxyphenylV2- (ethoxycarbonylamino)ethane.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)ethylamine prepared as in Example 1 (0.725 g, 2.25 mmol) and 4-acetamidobenzaldehyde (0.37 g, 2.25 mmol) in chloroform (15 ml) under an argon atmosphere was heated at reflux for 3 hours and the solvent was removed by distillation. Additional chloroform (10 ml) was added and reflux was continued for an additional hour. The mixture was cooled, the solvent was removed in vacuo. the residue was redissolved in tetrahydrofuran (15 ml) and a solution of anhydrous hydrochloric acid in ether (1.0 M, 2.5 ml) was added. The solution was evaporated to dryness, the residue was redissolved in absolute methanol (10 ml), cooled to 0°C and sodium cyanoborohydride (0.28 g, 4.5 mmol) in methanol (5 ml) was added The mixture was allowed to warm to room temperature and stirred overnight The colorless mixture was partitioned between methylene chloride and 10% sodium hydroxide and the organic layer dried (potassium carbonate). The residue was purified by flash chromatography, eluting with 3% methanol/methylene chloride to provide a foam of the title compound (0.84 g, 80%).

B) l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone.

A solution of 2-ethoxycarbonylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(4- acetamidobenzylamino)ethane (0.08 g, 0.17 mmol) in ethanol (3 ml) and aqueous sodium hydroxide (2.5 M, 0.2 ml) was heated at reflux under an argon atmosphere for

48 hours. The mixture was cooled, partitioned between methylene chloride and water and the aqueous layer extracted with methylene chloride. The organic layer was dried (potassium carbonate) and evaporated. The residue was purified by flash chromatography, eluting with a gradient of 2-5% methanol/chloroform, and the resulting solid was purified by recrystallization from chloroform/ether to provide a solid of the title compound (0.05 g, 65%): m.p. 191°C. Analysis Calc. for C24H29N3O4: C 68.06,

H 6.90, N 9.92; found: C 67.90, H 7.21, N 9.86.

EXAMPLE 5 l-(4-Aminobenzyl)-4-(3-cvclopentyloxy-4-methoxyphenyl^')-3-methyl-2-imidazolidinone

UBSTITUTE SHEET A) 2-(3-Cvclopentyloxy-4-methoxyphenylV2-methylaminoacetonitrile hydrochloride.

A mixture of 3-cyclopentyloxy-4- methoxybenzaldehyde (5.5 g, 25 mmol), trimethylsilyl-cyanide (4.2 mL, 31.3 mmol) and a trace of anhydrous zinc iodide under an argon atmosphere was stirred at room temperature. After 30 min, a cold solution of anhydrous methylamine in methanol (5 M, 25 mL, 125 mmol) was added and the mixture was heated in a sealed reaction vessel at 40°C for 3 hours. The vessel was vented and the liquids were removed in vacuo. The resulting oil was redissolved in methanol, concentrated hydrochloric acid (2.3 mL, 27 mmol) and ether were added to produce a solid, which was washed well with ether and dried to produce the hydrochloride salt as an off-white powder (6.5 g, 85%): m.p. 123 - 127°C (dec). Analysis Calc. for CwHi ^O^HCl: C 59.47, H 6.77,

N 9.91; found : C 59.30, H 6.91, N 9.87.

B) 2-Ethoxycarbonylmethylamino-2-(3-cvclopentyloxy-4- methoxyphenyDacetonioile.

2-(3-cyclopentyloxy-4-memoxyphenyl)-2-memylaminoacetonitrile hydrochloride (2.0 g, 6.7 mmol) was suspended in saturated aqueous sodium bicarbonate (15 mL) and methylene chloride (25 mL) was added The mixture was stirred vigorously under an argon atmosphere until all solid dissolved and then ethyl chloroformate (1.35 mL, 14 mmol) was added in one portion. After 3 h at room temperature, the mixture was partitioned, the methylene chloride was dried (potassium carbonate) and the solvent removed in vacuo to provide an oil (2.6 g, 100%).

C) 2-Ethoxycarbonylmethylamino-2-(3-cvclopentyloxy-4- methoxyphenyl^'.ethylamine.

2-Ethoxycarrx)nyl-methylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)acetonitrile (2.4 g, 7.2 mmol) and concentrated ammonium hydroxide (2 mL) were added to a suspension of Raney nickel (2.4 mL of 50% suspension in water, washed three times with ethanol) in ethanol (70 mL). The mixture was hydrogenated at 60 psi for 3 h, diluted with methylene chloride, filtered through celite and evaporated to an oil. The residue was partitioned between methylene chloride and dilute aqueous hydrochloric acid and the organic layer was discarded. The aqueous layer was basified with saturated aqueous sodium carbonate, extracted with methylene chloride and dried (potassium carbonate). Solvent evaporation provided the amine (3.0 g, 100%); m.p.79 - 84°C. Analysis Calc. for C17H26N2O4 »l/8 H2O:

C 62.89, H 8.15, N 8.63; found : C 62.70, H 8.17, N 8.47.

SUBSTITUTE SHEET D) 2-Ethoxycarbonylmethylamino-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(4- nitrobenzylaminotethane.

A solution of 2-ethoxycarbonylmethylamino-2-(3-cyclopentyloxy-4- methoxyphenyl)ethylamine (1.88 g, 5.6 mmol) and 4-nitrobenzaldehyde (0.89 g, 5.9 mmol) in chloroform (25 mL) under an argon atmosphere was heated at reflux for 6 h. ^* The mixture was cooled, the solvent was removed in vacuo and a solution of anhydrous hydrochloric acid in ether (1 M, 5.7 mL) was added. The solution was evaporated to dryness, the residue was redissolved in absolute methanol (25 mL) and sodium cyanoborohydride (0.71 g, 11.3 mmol) was added. The mixture was stirred at room temperature for 2 h, partitioned between ethyl acetate and ten percent aqueous sodium hydroxide and the organic layer dried (sodium sulfate). The residue was purified by flash chromatography, eluting with 50% hexanes/ethylacetate to provide the amine (1.11 g, 42%).

E) l-(4-Aminobenzyl)-4-(3-cvclopentyloxy-4-methoxyphenyl)-3-methyl-2- imidazolidinone.

A solution of 2-ethoxycarbonylmethylamino-2-(3-cyclopentyloxy-4-methoxy- phenyl)-l-(4-nitrobenzylamino)ethane (1.11 g, 2.4 mmol) in acetic acid (6.5 mL) and water (6.5 mL) was treated with an aqueous solution of titanium trichloride (20%, 12.2 mL). After 30 min, concentrated ammonium hydroxide (16 mL) and 97:3 methylene chloride/methanol were added and the mixture was filtered through a glass fiber filter. The methylene chloride layer was separated and dried (sodium sulfate). The solvent was evaporated. The residue (0.99 g, 2.1 mmol) in ethanol (55 mL) and aqueous sodium hydroxide (2.5 M, 2.6 mL) was heated at reflux for 48 h. The mixture was cooled, partitioned between ethyl acetate and water and the aqueous layer extracted with both ethyl acetate and ether. The combined organic layers were dried (sodium sulfate) and evaporated. The residue was purified by flash chromatography, eluting with 10% ether/methylene chloride, followed by recrystallization from methylene chloride/ether, to provide a solid of l-(4-aminobenzyl)-l-4-(3-cyclopentyloxy-4-methoxyphenyl)-3- methyl-2-imidazolidinone (0.7 g, 88%): m.p. 143°C.

Analysis Calc. for C23H29N3O3 : C 69.85,

H 7.39, N 10.62; found : C 69.82, H 7.46, N 10.52.

EXAMPLES 6 and 7 (2RV and (2S> 1 -Benzyloxycarbonylamino-2-(3-cvclopentyloxy-4-methoxyphenyl')-2- r(-)-menthyloxycarbonylamino1ethane

STITUTE SHEET A) 2-(3-Cvclopentyloxy-4-methoxyphenylV2-rf-Vmenthyloxycarbonyl- aminolacetonitrile

A solution of 2-amino-2-(3-cyclopentyloxy-4-methoxyphenyl)acetonitrile hydrochloride (as prepared in Example 1, part A) (39 g, 137.9 mmol) in methylene chloride (450 mL) was treated with saturated aqueous sodium bicarbonate (350 mL) and stirred under argon until the amine had dissolved. To the mixture was added (-)- menthyl chloroformate (44.4 mL, 206.9 mmol) and the mixture was stiired vigorously for 18 h. The organic layer was separated, dried (potassium carbonate) and evaporated. The product was recrystallized from methylene chloride and hexanes, washing the filtered solid with 9:1 hexanes/ether (34.7 g, 59%): m.p. 124 - 141 Q The mother liquor was evaporated and purified by flash chromatography, eluting with 6:1:2 hexanes/ether/methylene chloride, to provide a solid (21.2 g, 36%): m.p. 114 - 125°C. Analysis Calc. for C25H36N2θ4'l/10H2θ : C 69.77, H 8.48, N 6.51; found : C 70.14, H 8.41, N 6.66.

B) 2-(3-Cvclopentyloxy-4-methoxyphenylV2-r(-^'.-menthyloxycarbonyl- aminolethylamine

A solution of 2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)- menthyloxycarbonyl-amino]acetonitrile (27.5 g, 64.2 mmol) in hot ethanol (650 mL) was treated with Raney nickel (28 mL of a 50% suspension washed three times with ethanol) and concentrated ammonium hydroxide (30 mL). The mixture was hydrogenated at 50 psi for 2 h and filtered through celite washing with methylene chloride. The solvent was evaporated in vacuo to provide a solid (27.5 g, 99%). Analysis Calc. for C25H40N2O4 : C 69.41, H 9.32, N 6.48; found : C 68.21, H 9.73, N 5.06.

C) l-Benzyloxycarbonylamino-2-(3-cvcIopentyloxy-4-methoxyphenyl)-2-r(-)- menthyloxycarbonylaminolethane

To a solution of 2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)- menthyloxycarbonylamino]ethylamine (27.2 g, 62.9 mmol) in methylene chloride (500 mL) was treated with triethylamine (9.2 mL, 66.2 mmol) under an argon atmosphere, and cooled to 0°C. Over a period of 10 min, benzyl chloroformate (9.1 mL, 63.7 mmol) was added, and the reaction was stirred for 16 h, slowly coming to room temperature. The mixture was partitioned between methylene chloride and dilute hydrochloric acid. The organic extracts were dried (magnesium sulfate) and evaporated Purification by flash chromatography, eluting with 97:3 methylene

SUBSTITUTE SHEET chloride/ether, provided a solid which was recrystallized from methylene chloride/ether/hexanes to provide a solid (27.1 g, 76%): m.p. 154-164°C. D) (2R)- and (2S)-l-Benzyloxycarbonylamino-2-(3-cvclopentyloxy-4- methoxyphenyl')-2-rM-menthyloxycarbonylamino1ethane Diastereomeric separation of l-benzyloxycarbonylamino-2-(3-cyclopentyloxy-

4-methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane was accomplished with preparative HPLC conditions using a JY-100 chromatospac apparatus equipped with a 8cm x 100cm column packed with 1.8 kg YMC sperical silica gel (15-30μ). The mobile phase of 95:5 methylene chloride/ether eluted at a flow rate of 200 mL/min and a load of 13 g per run. The total amount of mixed sample run was 51 g (54% 2R, 46% 2S). Refractive index detection of the eluting product was employed Recovery of the 2R-isomer was 25.2 g (92%); 99.9% HPLC, and recovery of the 2S-isomer was 20.7 g (88%); 99.3% HPLC: m.p. (2R): 178-179°C; (2S): 167-169⁰Q Analysis Calc. for C33H46N2O6 : C 69.94, H 8.18, N 4.94; found : 2R: C 69.95, H 8.19, N 4.92; 2S: C 69.55, H 7.89, N 4.84. 2R: [α]^⁵ (0.5, methanol) = -67.2^©

2S: [α]^⁵ (0.5, methanol) = +9.2

EXAMPLE 8 R-(- -4-(3-Cyclopehtyloxy-4-methoxyphenyl -2-imidizolidinone

A) (2RV2-(3-Cyclopentyloxy-4-methoxyphenyD-2-r(-^')-menthyloxycarbonyl- aminolethylamine

A solution of (2R)-l-benzyloxycarbonylamino-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane ( 293 mg, 0.52 mmol) in methanol (20 mL) was treated with 10% palladium on carbon (306g) and ammonium formate (168 mg, 2.6 mmol). The reaction was allowed to stir at 50-55°C for 0.5 h, basified with concentrated ammonium hydroxide and then filtered through Celite. The solvent was removed in vacuo and the residue was partitioned between 95:5 methylene chloride/methanol and water. The organic extracts were dried (sodium sulfate) and evaporated to a white solid (222 mg, 99%).

B) R-C-'j^G-Cyclopentyloxy-^-methoxyphenylVΣ-imif-iaznli innnft A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)- menthyloxycarbonylaminojethylamine (149 mg, 0.34 mmol) in dimethylsulfoxide (3 mL) was treated with 10% aqueous sodium hydroxide (0.15 L, 0.41 mmol) and stirred

TUTE SHEET imder an argon atmosphere for 1.5 h. The mixture was diluted with ethyl acetate and the pH was adjusted to - 6 with ammonium chloride. The aqueous phase was extracted with ethyl acetate, and the combined organic extracts were washed five times with water. The organic extracts were dried (sodium sulfate) and evaporated. Purification by flash chromatography, eluting with 97:3 methylene chloride/methanol, provided a white solid (70 mg, 74%): m.p. 135-137°C. Analysis Calc. for C15H20N2O3 : C 65.20, H 7.30, N 10.14; found : C 65.26, H 7.39, N 10.14. [α]^⁵ (1.13, methanol) = -25.2⁰ EXAMPLE 9

S-(+ *4-(3-(_ clopentyloxy-4-methoxyphenyl^'.-2-imidiazolidinone

A) (2SV2-(3-Cyclopentyloxy-4-methoxyphenyl^';-2-r(-Vmenthyloxy- carbonylaminolethylamine A solution of (2S)-l-benzyloxycarbonyIamino-2-(3-cyclopentyloxy-4-methoxy- henyl)-2-[(-)-menthyloxycarbonylamino]ethane (1.65 g, 2.91 mmol) in methanol (100 mL) was treated with 10% palladium on carbon (1.65 g) and ammonium formate (1.0 g, 15.8 mmol). The reaction was allowed to stir at 50-55°C for 0.25 h and then filtered through Celite. The solvent was removed in vacuo and the residue was partitioned between 95:5 methylene chloride/methanol and 95:5 water/concentrated ammonium hydroxide. The organic extracts were dried (sodium sulfate) and evaporated to a white solid (1.21 g, 96%).

B) S-W-4-(3-(_ clopentyloxy-4-methoxyphenylV2-imida7.n1idιnnnft A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyl- oxycarbonylamino]ethylamine (147.3 mg, 0.34 mmol) in dimethylsulfoxide (3 mL) was treated with 10% aqueous sodium hydroxide (0.15 mL, 0.41 mmol) and stirred under an argon atmosphere for 1.5 h. The mixture was diluted with ethyl acetate and the pH was adjusted to - 6 with ammonium chloride. The aqueous phase was extracted with ethyl acetate, and the combined organic extracts were washed 5 times with water.

The organic extracts were dried (sodium sulfate) and evaporated. Purification by flash chromatography, eluting with 97:3 methylene chloride/methanol, provided a white solid (80.4 mg, 84%): m.p. 134-136⁰C.

Analysis Calc. for Cl5H20N2θ3^«5/4H2θ : C 60.28, H 6.75, N 9.37; found : C 60.35, H 6.60, N 9.42.

[α]_β ⁵ (1.30, methanol) = +22⁰

SUBSTITUTE SHEET EXAMPLE 10 S-(-Vl-(4-AminobenzvD-4-(3-cvclopentyloxy-4-methoxyphenyl)-2-imidazolidinone

(A) (2S)-l-(4-Nitrobenzylamino)-2-(3-cvclopentyloxy-4-methoxyphenyl)-2-r(-)- menthyloxycarbonylaminolethane

A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyloxyc- arbonylamino]ethylamine (553 mg, 1.27 mmol) and 4-nitrobenzaldehyde (202 mg, 1.33 mmol) in chloroform (10 mL) under an argon, atmosphere was stirred for 8 h at reflux and for 18 h at room temperature. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (10 mL) and methanol (15 mL). Sodium cyanoborohydride (242 mg, 3.85 mmol) was added and the solution was stirred for 0.5 h. Addition of acetic acid (150 μL, 2.5 mmol) was followed by stirring at room temperature for 2 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride/methanol and water several times, and the organic extracts were dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 25:75 ethyl acetate/hexanes, provided a yellow solid (293 mg, 41%): m.p. 76-77.5⁰C.

B) (2S -l-(4-AminobenzylaminoV2-(3-cvclopentyloxy-4-methoxyphenyl^')-2-r(-'r- menthyloxycarbonylaminolethane

A solution of (2S)-l-(4-nitrobenzylamino)-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-(-)-menthyloxycarbonylamino]ethane (270 mg, 0.5 mmol) in methanol (1.5 mL) was treated with acetic acid (1.45 mL), water (1.45 mL) and titanium trichloride (2.6 mL of a 20% aqueous solution). The reaction was stirred for

15 min, at which time water (1.45 mL) and concentrated ammonium hydroxide (3.5 mL) were added. The reaction was diluted with 1:1:2 aqueous sodium carbonate/methanol methylene chloride (100 mL) and stirred for 1 h. The mixture was filtered through Celite, washing well with 5%methanol/methylene chloride and evaporated. The residue was partitioned between water and methylene chloride, and the organic extracts were dried (potassium carbonate) and evaporated to provide a yellow solid (237 mg, 93%): m.p. 74-75°C.

C) S-(-Vl-f4-Aminobenzyl^')-4-(3-cvclopentyloxy-4-methoxyphenyl)-2- imidazolidinone

A solution of (2S)-l-(4-aminobenzylamino)-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane (232 mg, 0.43 mmol) in

HEET dimethylsulfoxide (5 mL) was treated with 10% sodium hydroxide (210 μL, 0.54 mmol) and stirred for 1 h under an argon atmosphere at 80-85°C. The reaction mixture was cooled and extracted twice with ethyl acetate. The organic extracts were washed 5 times with water, dried (potassium carbonate) and evaporated Purification by flash chromatography, first eluting with 7:3 ethyl acetate/hexanes, then a second column, eluting with 98.5:1.5 methylene chloride/methanol, provided a off-white solid (119 mg, 63%): m.p. 72-74^θQ

Analysis Calc. for C22H27N3O3-4/4H2O : C 68.46, H 7.18, N 10.89; found : C 68.35, H 7.07, N 10.52. [α]^⁵ (0.99, methanol) = -85°

EXAMPLE 11 R-f+Vl-(4-Aminobenzy -4-(3-cyclopentyloxy-4-memoxyphenylV2-imidazohdinone

A) (2RVl-(4-NitrobenzylaminoV2-(3-cyclopentyloxy-4-methoxyphenylV2-r(- - menthyloxycarbonylaminolethane

A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyl- oxycarbonylamino]ethylamine (843 mg, 1.95 mmol) and 4-nitrobenzaldehyde (311 mg, 2.04 mmol) in chloroform (15 mL) under an argon atmosphere was stirred for 18 h at reflux. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (10 mL) and methanol (10 mL). Sodium cyanoborohydride (371 mg, 5.8 mmol) was added and the solution was stirred for 1 h. Addition of acetic acid (225 μL, 3.7 mmol) was followed by stirring at room temperature for 48 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride/methanol and water several times, and the organic extracts were dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 3:7 ethyl acetate hexanes, provided a yellow solid (704 mg, 64%): m.p.62-64°C.

B) (2RVl-(4-Aminobenzylamino-2-(3-cyclopentyloxy-4-methoxyphenyl^'.-2-f(-V menthyloxycarbonylaminolethane

A solution of (2R)-l-(4-nitrobenzylamino-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane (683 mg, 1.2 mmol) in methanol (5 mL) was treated with acetic acid (4.5 mL), water (4.5 mL) and titanium trichloride (7.8 mL of a 20% aqueous solution). The reaction was stirred for 15 min, at which time water (4.5 mL) and concentrated ammonium hydroxide (10.5 mL) were added. The reaction was diluted with 1:1:2 aqueous sodium

BSTITUTE SHEET carbonate/methanol/methylene chloride (300 mL) and stirred for 1.5 h. The mixture was filtered through Celite, washing well with 5% methanol/methylene chloride and evaporated. The residue was partitioned between water and methylene chloride, and the organic extracts were dried (potassium carbonate) and evaporated to provide a yellow solid (625 mg, 97%): m.p. 71-73⁰Q

C) R-(* )-l-(4-Aminobenzyl -4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone

A solution of (2R)-l-(4-aminobenzylamino)-2-(3-cyclopentyloxy-4-methoxy- phenyl)-2-[(-)-menthyloxycarbonylamino]ethane (615 mg, 1.2 mmol) in dimethylsulfoxide (3 mL) was treated with 10% sodium hydroxide (600 μL, 2.5 mmol) and stirred for 2 h under an argon atmosphere at 85-90°C. The reaction was cooled, water added and extracted twice with ethyl acetate. The organic extracts were washed 5 times with water, dried (potassium carbonate) and evaporated Purification by flash chromatography, first eluting with 98.5: 1.5 methylene chloride/methanol, then a second column, eluting with 98:2 methylene chloride/methanol, provided a yellow solid (310 mg, 68%): m.p. 71-73°C. Analysis Calc. for C22H27N3θ3«5/8H2θ : C 67.28, H 7.25, N 10.70; found : C

67.24, H 7.02, N 10.34. [α]p⁵ (1.12, methanol) = +80°

EXAMPLE 12 S-(- -l-(4-BenzylpyridylV4-f3-cyclopentyloxy-4-methoxyphenyl')-2-imidazolidinone

A) (2S -l-(4-Benzylpyridylamino -2-(3-cyclopentyloxy-4-methoxyphenyl)-2- r(- -menthyloxycarbonylaminolethane

A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyl- oxycarbonylamino]ethylamine (444 mg, 1.03 mmol) and 4-pyridine-carboxaldehyde (105 μL, 1.08 mmol) in chloroform (10 mL) under an argon atmosphere was stirred for 4.5 h at reflux and then allowed to stir at room temperature for 18 h. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (8 mL) and methanol (5 mL). Sodium cyanoborohydride (198 mg, 3.1 mmol) was added and the solution was stirred for 0.5 h. Addition of acetic acid (120 μL, 2.1 mmol) was followed by stirring at room temperature for 2 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride/methanol and water, and the organic layer was dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 98:2 methanol/methylene chloride, provided the product (353 mg, 66%).

B) S-(- 1 -(4-Benzylpyridyl)-4-f 3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone

A solution of (2S)-l-(4-benzylpyridylamino)-2-(3-cyclopentyloxy-4-methoxy- phenyl)-2-[(-)-menthyloxycarbonylamino]ethane (322 mg, 0.62 mmol) in dimethylsulfoxide (5 mL) was treated with 10% sodium hydroxide (300 μL, 0.74 mmol) and stirred for 0.5 h under an argon atmosphere at 100-105°C. The reaction was cooled and extracted twice with ethyl acetate. The organic extracts were washed 5 times with water, dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 97.5:2.5 methylene chloride/methanol, provided a pale yellow solid (162 mg, 71%), which was triturated with ether and dried (143 mg): m.p.l46-147⁰C. Analysis Calc. for C2lH25N3θ3«3/8H2θ : C 67.40, H 6.94, N 11.23; found : C

67.71, H 6.82, N 11.05. [α]p⁵ (0.95, methanol) = -64.6⁰

EXAMPLE 13 R-(+Vl- 4-Benzylρyridyl)* -(3-cyclopentyloxy-4-methoxyphenyl)-2-mιiά^zolidinone

A) (2R)-l-(4-BenzylpyridylaminoV2-(3-cyclopentyloxy-4-methoxyphenyl)-2-ff-)- menthyloxycarbonylaminolethane

A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyl- oxycarbonylaminojethylamine (358 mg, 0.83 mmol) and 4-pyridinecarboxaldehyde (85 μL, 0.87 mmol) in chloroform (8 mL) under an argon atmosphere was stirred for 6 h at reflux and then allowed to stir at room temperature for 18 h. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (5 mL) and methanol (5 mL). Sodium cyanoborohydride (161 mg, 2.5 mmol) was added and the solution was stirred for 1 h. Addition of acetic acid (95 μL, 1.7 mmol) was followed by stirring at room temperature for 18 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride/methanol and water, and the organic layer was dried (potassium carbonate) and evaporated. Purification by flash chromatography, first eluting with 97:3 methanol/methylene chloride, followed by a second separation using flash chromatography, eluting with 98:2 methanol/methylene chloride, provided the product (120 mg, 28%).

SUBSTITUTE SHEET B) R-(+Vl-(4-Benzylpyridyl)-4-(3-cvclopentyloxy-4-methoxyphenylV2- ■mi--.a7.n1iriinr.nft

A solution of (2R)-l-(4-benzylpyridylamino)-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane (112 mg, 0.21 mmol) in dimethylsulfoxide (3 mL) was treated with 10% sodium hydroxide (110 μL, 0.26 mmol) and stirred for 1 h under an argon atmosphere at 80-85°C. The reaction was cooled, water added and extracted twice with ethyl acetate. The organic extracts were washed 5 times with water, dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 97:3 methylene chloride/methanol, provided a white solid (41 mg, 52%): m.p. 135-137⁰Q

Analysis Calc. for C2lH25N3θ3^«0.55Siθ2 : C 60.33, H 6.03, N 10.05; found : C 60.32, H 6.14, N 9.92.

EXAMPLE 14 S-(-Vl-(4-Acetamidobenzy -4-(3-cvclopentyloxy-4-methoxyphenyl)-2- ^•imiria nliriinnnp.

A) S-(-V 1 -(4-Acetamidobenzyl'. -4-(3-cvclopentyloxy-4-methoxyphenyl'.-2- imiria7n1ι^*ri.nr.n.*i To S-(-)- l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone (50 mg, 0.13 mmol) was added a solution of acetic anhydride (37 μL, 0.39 mmol) and pyridine (one-half drop) in methylene chloride (1 mL) and the mixture was stirred at ambient temperature for 0.5 h under an argon atmosphere. The reaction mixture was purified by flash chromatography, eluting with 98:2 methylene chloride/methanol, to provide a white solid (51 mg, 93%): m.p. 98-100°C.

Analysis Calc. for C24H29N3θ4^«l/2H2θ : C 66.65, H 6.99, N 9.72; found : C

66.94, H 6.89, N 9.58.

[α]_β ⁵ (0.90, methanol) = -72.9°

EXAMPLE 15

R-(+'.-l-(4-Acetamidobenzyl'.-4-G-cyclopentyloxy-4-methoxyphenylV2- imidazolidinone

R-(* Vl-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imiria7.n1iriinnnp.

To R-(+)-l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone (50 mg, 0.13 mmol) was added a solution of acetic anhydride (37 μL, 0.39 mmol) and pyridine (one-half drop) in methylene chloride (1 mL).and the mixture was stirred at ambient temperature for 0.5 h under an argon atmosphere. The reaction mixture was purified by flash chromatography, eluting with 98:2 methylene chloride/methanol, to provide a white solid (51 mg, 93%): m.p. 99-102 Q Analysis Calc. for C24H29N3θ4'l 2H2θ : C 66.65, H 6.99, N 9.72; found : C

66.89, H 6.60, N 9.38.

[α]p⁵ (0.99, methanol) = +75.6°

EXAMPLE 16 S-f-Vl-f4-OxamidobenzyD-4-(3-cyclopentyloxy-4-me oxyphenylV2-imidazolidinone

S-f-Vl-(4-Oxamidobenzyl -4-(3-cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone

To a solution of S-(-)-l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone (76 mg, 0.2 mmol) in methylene chloride (1.5 mL) at 0°C under an argon atmosphere was added triethylamine (0.03 mL, 0.22 mmol) and methyl oxalyl chloride (0.04 mL, 0.22 mmol). After 0.5 h, aqueous ammonium chloride was added, the mixture was poured into water and extracted three times with methylene chloride. The organic extracts were dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 4:1 ethyl acetate/hexanes, provided a white foamy solid (89 mg, 93%): m.p.77-80°C. This methyl oxamate (89 mg, 0.19 mmol) in methanol (1 mL) in a pressure tube under an argon atmosphere was cooled to -78°C and anhydrous ammonia (3 mL) was condensed into the tube. The tube was sealed and the mixture was allowed to come to ambient temperature. After 20 h, the tube was cooled to -78°C, unsealed and allowed to come to ambient temperature under a stream of argon. The residue was dissolved, filtered and evaporated. Trituration with methylene chloride provided a white solid (79 mg, 91%): m.p. 191-193⁰Q

Analysis Calc. for C24H28N4O5-O.6H2O : C 62.22, H 6.35, N 12.09; found : C 62.25, H 6.22, N 11.97. [α]p⁵ (0.99, dimethylsulfoxide) = -47.7°

EXAMPLE 17 R-(+Vl-f4-Oxan_tidobenzyD-4-(3-cyclopentyloxy-4-m

R-f+Vl-(4-Oxamidobenzyl^-(3-cyclopentyloxy-4-memoxyphenvD-2-imidazoHdinone To R-(+)-l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone (51 mg, 0.13 mmol) at 0°C under an argon atmosphere was added a solution of triethylamine (0.02 mL, 0.14 mmol) in methylene chloride (0.5 mL) and a solution of methyl oxalyl chloride (0.014 mL, 0.14 mmol) in methylene chloride (0.5 mL). After 0.5 h, aqueous ammonium chloride was added, the mixture was poured " into water and extracted three times with methylene chloride. The organic extracts were dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 3:1 ethyl acetate/hexanes, provided a sticky white solid (58 mg, 96%); m.p. 127-131°C. This methyl oxamate (58 mg, 0.12 mmol) in methanol (1 mL) in a pressure tube under an argon atmosphere was cooled to -78°C and anhydrous ammonia (2 mL) was condensed into the tube. The tube was sealed and the mixture was allowed to come to ambient temperature. After 18 h, the tube was cooled to -78°C, unsealed and allowed to come to ambient temperature under a stream of argon. The residue was dissolved, filtered and evaporated. Trituration with methylene chloride provided a white solid (35 mg, 61%): m.p. 192-193⁰Q

Analysis Calc. for C24H28N4θ5«l/3H2θ : C 62.88, H 6.30, N 12.22; found :

C 63.23, H 6.27, N 11.78. [α]^⁵ (0.99, dimethylsulfoxide) = +49.1°

EXAMPLE 18 R-f+Vl-('4-FormamidobenzylV4-(3-cyclopentyloxy-4-methoxypheny -2- imidazolidinone

R-f- '.-l-(4-Formamidobenzyl')-4-(3-cyclopentyloxy-4-methoxyphenylV2- imidazolidinone Acetic formic anhydride was prepared by heating a mixture of acetic anhydride (5.0 mL, 53 mmol) and formic acid (2.1 mL, 56 mmol) at 40-45°C for

3 h. To acetic formic anhydride (37 μL, 0.39 mmol) at 0°C under an argon atmosphere was added dropwise a solution of R-(+)-l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone (66 mg, 0.17 mmol) in dry tetrahydrofuran (1.5 mL), the mixture was allowed to warm to ambient temperature and stirred for 18 h. The reaction mixture was partitioned between methylene chloride and aqueous sodium bicarbonate, the organic extracts were washed with water, dried and evaporated. Purification by flash chromatography, eluting with 98:2 methylene chloride/methanol, provided a white solid (57 mg, 82%): m.p. 92-95°C.

Analysis Calc. for C23H27N3O4 : C 67.46, H 6.65, N 10.26; found : C 67.09, H 6.64, N 10.06.

[α]p⁵ (0.90, methanol) = +89.3°

SUiSTITUTE SHEET EXAMPLE 19 S-(-Vl-(4-Formamidobenzyl)-4-(3-cvclopentyloxy-4-methoxyphenylV2- imiria7nliriinnnp.

S-M-l-(4-FormamidobenzylV4-(3-cvclopentyloxy-4-methoxyphenylV2- imidazolidinone Acetic formic anhydride was prepared by heating a mixture of acetic anhydride (5.0 mL, 53 mmol) and formic acid (2.1 mL, 56 mmol) at 40-45°C for 3 h. To acetic formic anhydride (25 μL, 0.27 mmol) at 0°C under an argon atmosphere was added dropwise a solution of S-(-)-l-(4-aminobenzyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone (65 mg, 0.17 mmol) in dry tetrahydrofuran (1.5 mL), the mixture was allowed to warm to ambient temperature and stirred for 18 h. The reaction mixture was partitioned between methylene chloride and aqueous sodium bicarbonate, the organic extracts were washed with water, dried and evaporated. Purification by flash chromatography, eluting with 98:2 methylene chloride/methanol, provided a foamy white solid (43 mg, 62%): m.p. 103-106°C.

Analysis Calc. for C23H27N3O4-1.1H20 : C 64.35, H 6.86, N 9.79; found : C

64.72, H 6.53, N 9.31.

[α]^⁵ (0.90, methanol) = -90.6°

EXAMPLE 20 l-(4-Acetamido-3-pyridylmethyl^')-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imiria7n1iriinnn_t

A) l-(4-Acetamido-3-pyridylmethylamino^'>-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone

A solution of (2R,2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)- menthyloxycarbonylaminojethylamine (409 mg, 0.95 mmol) and4-pyridine- carboxaldehyde (155 mg, 0.95 mmol) in chloroform (15 mL) under an argon atmosphere was stirred for 4 h at reflux and cooled. The solvent was removed in vacuo and a portion of the residue (195 mg, 0.34 mmoles) was redissolved in tetrahydrofuran (2 mL) and methanol (2 mL). Sodium cyanoborohydride (65 mg, 1.0 mmol) was added and the solution was stirred for 0.5 h. Addition of acetic acid (40 μL, 0.7 mmol) was followed by stirring at room temperature for 1 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride/methanol and water, and the organic layer was dried (potassium carbonate) and evaporated Purification by flash

SUBSTITUTE SHEET chromatography, first eluting with 3:97 methanol/methylene chloride, provided the amine (128 mg, 65%): m.p. 78-81 Q

B) l-(4-Amino-3-pyridylmethyl -4-(3-cvclopentyloxy-4-methoxyphenyl)-2- imidazolidinone

A solution of l-(4-acetamido-3-pyridylmethylamino)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone (121 mg, 0.21 mmol) in dimethylsulfoxide (3 mL) was treated with 10% sodium hydroxide (0.42 mL, 1.05 mmol) and stirred for 2.5 h under an argon atmosphere at 90-95°C. The reaction was cooled, water added and extracted twice with ethyl acetate. The organic extracts were washed 5 times with water, dried (potassium carbonate) and evaporated. Purification by flash chromatography, eluting with 96:4 methylene chloride/methanol, provided a white solid (63 mg, 79%): m.p. 69-71°C. Analysis Calc. for C2lH26N4θ3»0.5H2θ : C 64.43, H 6.95, N 14.31; found : C 64.30, H 6.86, N 14.05.

C) l-(4-Acetamido-3-pyridylmethyl)-4-(3-cvclopentyloxy-4-methoxyphenylV2- imidazolidinone

A solution of l-(4-amino-3-pyridylmethyl)-4-(3-cyclopentyloxy-4-methoxy- henyl)-2-imidazolidinone (36 mg, 0.09 mmol) in pyridine (2 mL) was treated with a solution of acetyl chloride (0.0075 mL, 0.11 mmol) in methylene chloride (0.5 mL) and the mixture was stirred for 1 h under an argon atmosphere at ambient temperature. An additional aliquot of acetyl chloride (0.0075 mL, 0.11 mmol) in methylene chloride (0.5 mL)was added and stirring was continued for 1.5 h. Water was added and the mixture was extracted three times with methylene chloride. The organic extracts dried (sodium sulfate) and evaporated. Purification by flash chromatography, eluting with 96:4 methylene chloride/methanol, provided an off-white solid (39 mg, 99%): m.p. 184- 187°C. the solid was triturated with methylene chloride and ether to provide a white solid (10 mg). Analysis Calc. for C23H28N4O4-O.65H2O : C 63.33, H 6.77, N 12.84; found : C

63.34, H 6.52, N 12.44.

EXAMPLE 21 S-(-')-4-(3-Cvclopentyloxy-4-methoxyphenyl)-l-(2.4-diaminobenzyl^,.-2- imiria7n1iriinnnft

SUBSTITUTE SHEET A) (2S -2-(3-Cvclopentyloxy-4-methoxyphenyl)-l-(2.4-Dinitrobenzylamino)-2-r(- Vmenthyloxycarbonylaminolethane

A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyloxycarbonyl- amino]ethylamine, obtained as described above from (2S)-l-benzyloxycarbonylamino- 2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane (2.00 g, 3.53 mmol), and 2,4-dinitrobenzaldehyde (762 mg, 3.88 mmol) in chloroform (40 mL) under an argon atmosphere was stirred for 5 h at reflux. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (38 mL) and methanol (40 mL) under an argon atmosphere. Sodium cyanoborohydride (664 mg, 10.6 mmol) was added and the solution was stirred for 1 h. Addition of acetic acid (404 μL, 7.1 mmol) was followed by stirring at room temperature for 72 h . Aqueous sodium bicarbonate was added, and the mixture was evaporated to dryness. The residue was partitioned between methylene chloride and water, and the organic extract was dried (sodium sulfate) and evaporated in vacuo. Purification by flash chromatography, eluting with from 40 to 60% ethyl acetate in hexane, provided a semi-solid (1.7 g, 79%).

B) (2S)-2-(3-Cvclopentyloxy-4-methoxyphenylVl-(2.4-diaminobenzylamino'.-2- K-Vmenthyloxycarbonylaminolethane

A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(2,4- dinitrobenzyl)-2-[(-)-menthyloxycarbonylamino]ethane (1.7 g, 2.8 mmol) in methanol

(16.6 mL) containing acetic acid (16.6 mL), was treated with water (16.6 mL) and titanium trichloride (35 mL of a 20% aqueous solution). The reaction was stirred for 90 min, chilled in an ice bath and a solution of water (24 mL) and concentrated ammonium hydroxide (47 mL) were added. The reaction was diluted with 5% sodium carbonate/methanol/methylene chloride (1:1:2) and stirred for 1 h. The mixture was separated and the aqueous phase extracted with methylene chloride. The organic extract was dried (potassium carbonate) and evaporated in vacuo. Purification by flash chromatography, eluting the product with chloroform (saturated with ammonium hydroxide and dried) provided a solid (1.04 g, 68%): m.p. 150-154°C.

C) S-(- -4-(3-Cyclopentyloxy-4-methoxyphenylVl-(2.4-diaminobenzyl)-2- imidazolidinone

A solution of (2S)-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diamino- benzylamino)-2-[(-)-menthyloxycarbonylamino]ethane (1.0 g, 1.81 mmol) in dimethylsulfoxide (8 mL) was treated with 10% sodium hydroxide (1.0 mL, 2.5 mmol) and stirred for 3 h under an argon atmosphere at 80-85°C. The reaction mixture was cooled, partitioned between cold water and ethyl acetate, and the organic extract was

SUBSTITUTE SHEET washed with water, dried (sodium sulfate) and evaporated in vacuo. Purification by flash chromatography, eluting the product with chloroform (saturated with ammonium hydroxide and dried) containing 0.5 to 2% methanol, provided a granular resin (459 mg, 64%): [α]^⁵ (0.609, methanol) = -83.6°. Analysis Calc. for C22H28N4O3 : C 66.65, H 7.12, N 14.13; found : C 66.40, H 7.04, N 13.96.

EXAMPLE.22 S-(-V4-(3-Cyclopentyloxy*-4-methoxyphenylM-(2.4-diacetamidobenzyl)-2- imidazolidinone.

To a solution of S-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- cttaminobenzyl)-2-imidazolidinone (240 mg, 0.605 mmol) in anhydrous pyridine (5 ml) was added acetic anhydride (340 μL, 3.60 mmol) and.the mixture was stirred at ambient temperature for 18 h under an argon atmosphere. The reaction mixture was concentrated in vacuo, and the residue partitioned between cold 3N HCl and ethyl acetate. The organic extract was washed with water, 5% aqueous sodium bicarbonate, water, dried over sodium sulfate and concentrated in vacuo. Purification by flash chromatography .eluting the product with chloroform (saturated with ammonium hydroxide and dried) containing 1 to 2% methanol, provided a resin (180 mg, 62%): [α]p⁵ (0.600, methanol) = -61°.

Analysis Calc. for C26H32N4θ5«l/4H2θ : C 64.38, H 6.75, N 11.55; found : C 64.61, H 6.77, N 11.38.

EXAMPLE 23 R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2.4-diaminobenzyl)-2- imidazolidinone

A) (^,2RV2-(3- clopentyloxy-4-methoxyphenylVl-f2.4-dinitrobenzylamino^'.-2-r(- Vmenthyloxycarbonylaminolethane A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-[(-)-menthyloxy- carbonylaminojethylamine, obtained as described above from (2R)-1- benzyloxycarbonyl-amino-2-(3-cyclopentyloxy-4-methoxyphenyl)-2-((-)- menthyloxycarbonylamino)ethane (2.00 g, 3.53 mmol), and 2,4-dinitrobenzaldehyde (762 mg, 3.88 mmol) in chloroform (40 mL) under an argon atmosphere was stirred for 5 h at reflux. The solvent was removed in vacuo and the residue was redissolved in tetrahydrofuran (10 mL) and methanol (15 mL). Sodium cyanoborohydride (665

EET mg, 10.6 mmol) was added and the solution was stirred for 1 h. Addition of acetic acid (405 μL, 7.1 mmol) was followed by stirring at room temperature for 72 h under an argon atmosphere. Aqueous sodium bicarbonate was added, and the solution was evaporated to dryness. The residue was partitioned between methylene chloride and water, and the organic extract was dried (sodium sulfate) and evaporated in vacuo. Purification by flash chromatography, eluting with from 30 to 50% ethyl acetate in hexane, provided an orange solid (1.25 g, 62%), mp 119-125°C.

B) (2R)-2-(3-Cvclopentyloxy-4-methoxyphenylVl-(2.4-diaminobenzylamino -2- r(-Vmenthyloxycarbonylamino1ethane A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(2,4-dinitro- benzylamino)-2-[(-)-menthyloxycarbonylamino]ethane (1.2 g, 2.0 mmol) in methanol (12 mL) containing acetic acid (12 mL), was treated with water (10 mL) and titanium trichloride (20.8 mL of a 20% aqueous solution). The reaction was stirred for 60 min, chilled in an ice bath and a solution of water (12 mL) and concentrated ammonium hydroxide (28 mL) were added. The reaction was diluted with 5% sodium carbonate/methanol/methylene chloride (1:1:2) and stirred for 1 h. The mixture was separated, the aqueous phase extracted with methylene chloride containing 5% methanol and the combined organic extracts were washed with water, dried (potassium carbonate), and evaporated in vacuo. Purification by flash chromatography, eluting with chloroform (saturated with ammonium hydroxide and dried) provided a tan solid

(0.59 g, 54%): m.p. 139-143°C.

C) R-r+')-4-r3-Cyclopentyloxy-4-methoxyphenv -l-(2.4-diaminobenzyl'.-2- imidazolidinone A solution of (2R)-2-(3-cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diaminobenzylamino)-2-[(-)-menthyloxycarbonylamino]ethane (0.59 g, 1.07 mmol) in dimethylsulfoxide (4 mL) was treated with 10% sodium hydroxide (0.53 mL, 1.3 mmol) and stirred for 3.5 h under an argon atmosphere at 80-85°C. The reaction mixture was cooled, partitioned between cold water and ethyl acetate, and the organic extract was washed with water, dried (potassium carbonate) and evaporated in vacuo.

Purification by flash chromatography, eluting the product with chloroform (saturated with ammonium hydroxide and dried) containing 1 to 2% methanol, provided a resin (352 mg, 83%): [α]^⁵ (0.564, methanol) = +84θ.

Analysis Calc. for C22H28N4O3 : C 66.65, H 7.12, N 14.13; found : C 66.43, H 7.03, N 14.11.

SUBSTITUTE SHEET EXAMPLE 24 R-('+)-4-(3-Cvclopentyloxy-4-methoxyphenv -l-(2.4-diacetamidobenzyl)-2- imidazolidinone.

To a solution of R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diaminobenzyl)-2-imidazolidinone (176 mg, 0.44 mmol) in anhydrous pyridine (4 ml) was added acetic anhydride (250 μL, 2.64 mmol) and the mixture was stirred at ambient temperature for 18 h under an argon atmosphere. The reaction mixture was concentrated in vacuo, and the residue partitioned between cold 3N HCl and ethyl acetate. The organic extract was washed with water, 2% aqueous sodium carbonate, water, dried over sodium sulfate and concentrated in vacuo. Purification by flash chromatography,eluting the product with chloroform (saturated with ammonium hydroxide and dried) containing 1 to 2% methanol, provided a resin (140 mg, 66%): [α]p⁵ (0.591, methanol) = 59°.

Analysis Calc. for C26H32N4θ5^«l/4H2θ : C 64.38, H 6.75, N 11.55; found : C 64.20, H 6.70, N 11.43.

By the methods given above, the following compounds may be prepared: Example No. Compound

25 l-(4-Cyanobenzyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone

26 l-(4-Amidinobenzyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)2-imidazolidinone

27 4-(3-Cyclopentyloxy-4-methylphenyl)- 1-[4-(2- imidazo)benzyl]-2-imidazolidinone 28 4-(3-Cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone

29 4-(3-Cyclopentyloxy-4-methoxyphenyl)- l-[4-(l- imidazo)benzyl]-2-iιnidzolidinone

30 4-(3-[4-Butoxy]-4-methoxyphenyl)-2-imidazolidinone

EXAMPLE 31 Formulations for pharmaceutical use incorporating compounds of the present invention can be prepared in various forms and with numerous excipients. Examples of such formulations are given below. Inhalant Formulation

A compound of Formula (I), (lμg to 100 mg) is aerosolized from a metered dose inhaler to deliver the desired amount of drug per use. Tablets/Ingredients Per Tablet

1. Active Ingredients

(cpd. of Formula Q 40 mg

2. Corn Starch 20 mg

3. Alginic Acid 20 mg

4. Sodium Alginate 20 mg

5. Mg Stearate 2_ mg

101.3 mg EXAMPLE 32 A pharmaceutical composition for parenteral administration is prepared by dissolving an appropriate amount of a compound of Formula (I) in polyethylene glycol with heating. This solution is then diluted with water for injection (to 100ml). The solution is then sterilized by filtration through a 0.22 micron membrane filter and sealed in sterile containers.

The above description fully discloses the invention including preferred embodiments thereof. Modifications and improvements of the embodiments specifically disclosed herein are within the scope of the following claims. Without further elaboration, it is believed that one skilled in the are can, using the preceding description, utilize the present invention to its fullest extent Therefore the Examples herein are to be construed as merely illustrative and not a limitation of the scope of the present invention in any way. The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows.

SUBSTITUTE SHEET

Claims

CLAIMS:What is claimed is

1. A compound of the formula:

wherein:

Ri is - (CR9RlO)n- (C(0)0)_r -(CR9Rιo)_m-R8-

-(CR9Rl0)n-(C(O)NR6)r(CR9Rl0)m-R8, or - (CR9Rlθ)n- (0)_s -(CR9Rl0)m-R8 wherein the alkyl moieties may be optionally substituted with one or more halogens; n is a number having a value of 0 to 4; m is a number having a value of 0 to 2; r is a number having a value of 0 or 1; s is a number having a value of 0 or 1;

R9 and Rio are independently selected from hydrogen or a Cl-2 alkyl; Rg is hydrogen, methyl, hydroxyl, tetrahydrofuran, tetrahydropyran, tetrahydrothiophene, tetrahydrothiopyran, C3-6 cycloalkyl, or a C4-6 cycloalkyl containing one or two unsaturated bonds, wherein the cycloalkyl and heterocyclic moieties may be optionally substituted by 1 to 3 methyl groups or one ethyl group; provided that a) when r is 1, n is 1 to 4; or b) when s is 1, n is 2 to 4; or c) when Rg is hydroxyl, r is 1, and n is 1 to 4, then m is 2; or d) when Rg is hydroxyl, and r or s is 0, then the sum of n + m is 2 to 6; or e) when m is 0, r is 1 in -(CR9Riθ)n- (C(0)0)r -(CR9Riθ)m-R8- then n is 1 to 4; or f) when Rg is a 2-tetrahydropyran or 2-tetrahydrothiopyran, 2-tetrahydrofuran or

2-tetrahydrothiophene, and r or s is 0, then the sum of n + m is 1 to 6; or g) when Rg is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or 2-tetrahydrothiophene, n is 1 to 4, and r is 1, then m must be 1 to 2; or h) when Rg is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or 2-tetrahydrothiophene, n is 2 to 4, and s is 1, then m must be 1 to 2; X is YR2, halogen, nitro, NR6R7, or formyl amine; Y is O or S(0)_m'; m' is a number having a value of 0 to 2;

HEET R2 is -CH3 or -CH2CH3 optionally substituted by 1 or more halogens; R3 is H, CH3, CN, CH2F, CHF2, or CF3; R4 is H, C1-C4 alkyl, OH, OCH3, OCH2CH3, or OAc; R5 is H, OH, -(CH2)qAr, or C . alkyl wherein the (CH2)qAr or Cι_6 alkyl group is optionally substituted one or more times by F, Br, Cl, -NO2, -NR R-j, -CO2R6- -OR6, -OC(0)R6, C(0)R6, CN, -C(0)-NR6R7, -C(S)-NR6R7, -NR6-C(0)-NR6R7, -NR6-C(S)-NR6R7- - NR6-C(0)-R6, - NR6-C(S)-R6, -NR6-C(0)-OR6, C(=NR6)-NR6R7, -C(=NCN)-NR6R7- -C(=NCN)-SR6, -NR6-C(=NCN)-SR6 , -NR6-C(=NCN)-NR6R7. -C(=NR6R7)SR6, -NR6-S(0)2-R6, -S(0)_m--R6, -NR6SO2-CF3, - NR6C(0)-C(0)-NR6R7- -NR6-C(0)-C(0)-OR6, 1-imidazolyl, or l-(NR6)-2-imidazolyl ;

Ar is 2-, 3- or 4-pyridyl, pyrimidyl, pyrazyl, imidazolyl, morpholino, 4- or 5- thiazolyl, triazolyl, 2- or 3- thienyl, 2-thiaphene, or phenyl;

Rg and R7 are independently hydrogen, or Cι_4 alkyl optionally substituted by one or more halogens; q is a number having a value of 0 to 2; and the pharmaceutically acceptable salts thereof.

2. The compound according to Claim 1 wherein the halogens are fluorine.

3. The compound according to Claims 1 or 2 wherein X is YR2.

4. The compound according to Claim 3 wherein Y is oxygen.

5. The compound according to Claims 1, 2 or 3 wherein R5 is H, optionally substituted -(CH2)qAr, or optionally substituted Ci-6 alkyl.

6. The compotmd according to Claims 1 to 5 wherein Ri is cyclopentyl,

-CF3, CH2F, -CHF2, -CF2CHF2, CH2CF3, or -CH2CHF2 or CH3.

7. The compound according to Claim 6 wherein R2 is methyl, -CF3, CF2H, or -CH2CHF2.

8. The compound according to Claim 7 wherein R4 is hydrogen, methyl or methoxy; and R3 is CN, CHF2, CF3, or H.

BSTITUTE SHEET

9. The compound according to Claim 5 wherein R5 is H, or optionally substituted -(CH2)qAr.

10. The compound according to Claim 8 or 9 wherein Ar is a phenyl or substituted phenyl and q is 1.

11. The compound according to Claim 10 wherein the optional substituents are selected from Br, Cl, NO2, NR6R7, CO2R6- -NH-C(=NCN)-SCH3, -NHC(0)-NR6R7, -C(0)NR6R7- -NHC(0)CH3, -NH-(=NCN)-NR6R7,

-NHC(0)C(0)-NR6R7. -NHSO2CH3, -S(0)_mCH3, -NHC(0)C(0)-OR6, -OR6,

12. The compound according to Claim 11 wherein the optional substituents are selected from -NH2, -N(CH3)2,-S(0)mCH3, -NH-C(0)-CH3, -CO2CH3, OCH3, CO2H, N0₂, -NH-C(=NCN)-SCH₃, -NH-C(=NCN)-NH₂, -NH-C(0)-NH₂, -NH-C(0)-C(0)-OR6, or NH-C(0)-C(0)-NR₆R7.

13. The compound according to Claim 1 which is 4-(3-Cyclopentyloxy-

4-methoxyphenyl)-2-imidazolidinone.

14. The compound according to Claim 1 which is l-(4-Aminobenzyl-4- (3-cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone.

15. The compound according to Claim 1 wherein the compound is selected from l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-3-methyl-2- imidazolidinone;

4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(4-dimethylaminobenzyl)-2- imidazolidinone;

4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone; l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone

S-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone S-(-)- l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

S-(-)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

S-(-)-l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; R-(*+-)-l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-

2-imidazolidinone;

S-(-)-l-(4-Oxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Oxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone;

S-(-)-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone; l-(4-Acetamido-3-pyridylmethyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone;

S-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diaminobenzyl)-2- imidazolidinone;

S-(-)-4-(3-Cycloχ)entyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone;

R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diaminobenzyl)- 2-imidazolidinone; or

R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone.

SUBSTITUTE SHEET

16. A method of inhibiting the production of tumor necrosis factor (TNF) in an animal in need thereof, which comprises administering to such animal an effective, TNF production inhibiting amount of a compound according to Claim 1.

17. The method of claim 16 wherein X is YR2.and the halogens are all fluorine.

18. The method of claim 17 wherein Y is oxygen, and R5 is H, optionally substituted -(CH2)qAr, or optionally substituted Ci-6 alkyl.

19. The method of claim 18 wherein Ri is cyclopentyl, CH3,

, or halo substituted alkyl; R2 is methyl or halosubstituted alkyl.

20. The method of claim 19 wherein q is 1, Ar is a phenyl optionally substituted by -NH2, -N(CH3)2, - S(0)_mCH3, -NH-C(0)CH3, NHC(0)NH2, CO2CH3, OCH3, NO2, -NHC(=NCN)NH2, -NHC-(=NCN)SCH3, - NHC(0)-C(0)- OCH3, -NHC(0)-C(0)-NH2 or COOCH3.

21. The method of claim 16 wherein the compound is selected from l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-3-methyl-2- imidazolidinone; 4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(4-dimethylaminobenzyl)-2- imidazolidinone;

4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone; l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; R-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone

S-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-2-imidazolidinone S-(-)-l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Aminobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

SUBSTITUTE SHE T S-(-)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Benzylpyridyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone; S-(-)-l-(4-Acetamidoben^l)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(+)-l-(4-Acetamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinone;

S-(-)-l-(4-Oxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(*+-)-l-(4-Qxamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-2- imidazolidinone;

R-(* )-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)- 2-imidazolidinpne; . S-(-)-l-(4-Formamidobenzyl)-4-(3-cyclopentyloxy-4-methoxyphenyl)-

2-imidazolidinone; l-(4-Acetamido-3-pyridylmethyl)-4-(3-cyclopentyloxy-4- methoxyphenyl)-2-imidazolidinone;

S-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diaminobenzyl)-2- imidazolidinone;

S-(-)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone;

R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4-diaminobenzyl)- 2-imidazolidinone; or R-(+)-4-(3-Cyclopentyloxy-4-methoxyphenyl)-l-(2,4- diacetamidobenzyl)-2-imidazolidinone.

22. The method of Claim 16 wherein the inhibition of TNF mediates the disease states of septic shock, endotoxic shock, gram negative sepsis, or toxic shock syndrome.

23. The method of Claim 16 wherein the inhibition of TNF mediates the disease states of cachexia secondary to AIDS, or cachexia secondary to cancer, acute immune deficiency syndrome (AIDS), AIDS Related Complex (ARC) or any other disease state associated with an HIV infection, or a viral infection selected from the group consisting of influenza, or CMV.

SUBSTITUTE SHEET

24. The method of Claim 16 wherein the inhibition of TNF mediates the disease states of adult respiratory distress syndrome, asthma, chronic pulmonary inflammatory diseases, Crohn's disease, ulcerative colitis, bone resoφtion, or graft vs. host reaction.

25. A pharmaceutical composition comprising an effective amount of a compound according to Claim 1 and a pharmaceutically acceptable carrier or diluent

26. A compound of the formula:

wherein

Rl is -CH2-C3 cyclic alkyl, -CH2-C5-6 cycloalkyl, C4-6 cycloalkyl, tetrahydrofuran, cyclopentenyl, -Ci-7 alkyl optionally substituted by 1 or more fluorines, -(CH2)2-4 OH, -(CH2)n-C(0)0(CH2)_m-CH3, - (CH2)p-0-(CH2)mCH3, all of which may be optionally substituted by one to three methyl groups or one ethyl group; m is a number having a value of 0 to 2; n is a number having a value of 1 to 3; p is a number having a value of 2 or 3;

X is YR2;

Yis O orS;

R2 is -CH3 or CH2CH3 optionally substituted by 1 or more fluorines; R3 is H, CH3, CN, CH2F, CHF2 or CF3;

R4 is H, C1-4 alkyl, OH, OCH3, OCH2CH3, or OAc; R5 is H, OH, -(CH2)q Ar, Cl-6 alkyl; wherein Ar and Cl-6 alkyl may be unsubstituted or substituted by one or more of the following:

F,Br,Cl,Nθ2,NR6R7, CO2R6, -NH-C(=NCN)-SCH3, -NHC(O)- NR6R7,-C(0)NR6R7,-NHC(0)CH3, -NH-(=NCN)-NR6R7--NHC(0)C(0)-

NR6R7, -NHSO2CH3,-S(0)_mCH3, -NHC(0)C(0)-OR6,-OR6,-CN, -C(=NR6)-NR6R7,

BSTITUTE SHEET

Ar is 2-, 3- or 4-pyridyl, pyrimidyl, pyrazyl, imidazolyl, morpholino, or phenyl;

Rg and R7 are independently hydrogen, or Cι_4 alkyl ; q is a number having a value of 0 to 2; or a pharmaceutically acceptable salt thereof.

27. The compound according to Claim 26 wherein Ri is

7 alkyl, -Ci-4 alkyl OH, or a C4-C5 cyclic alkyl optionally substituted by one to three methyl groups or one ethyl group.

28. A pharmaceutical composition comprising an effective amount of a compound according to Claim 26 and a pharmaceutically acceptable carrier or diluent

29. A method of inhibiting PDE IV which comprises administering to a mammal in need thereof, an effective amount of a compound according to Claim 27 sufficient to inhibit PDE IV.

30. The method according to Claim 29 wherein the inhibition of PDE IV mediates the disease state of asthma, or an allergic or inflammatory disease.

31. A method of treating asthma which comprises administering to a mammal in need thereof, an effective amount to inhibit PDE IV of a compound according to Claims 13 or 14.

32. A method of inhibiting PDE IV which comprises administering to a mammal in need thereof, an effective amount to inhibit PDE IV of a compound according to Claims 13, 14, or 15.

33. A process of making a compound of Formula (I):

SUBSTITUTE SHEET

wherein:

Ri is - (CR9RlO)n- (C(0)0)_r -(CR9Rlθ)m-Rδ- -(CR9Rlθ)n- (C(0)NR6)r -(CR9Rl0)m-R8, or - (CR9Rlθ)n- (0)_s -(CR9Rlθ)m-R8 wherein the alkyl moieties may be optionally substituted with one or more halogens; n is a number having a value of 0 to 4; m is a number having a value of 0 to 2; r is a number having a value of 0 or 1 ; s is a number having a value of 0 or 1; R9 and Rio are independently selected from hydrogen or a Cl-2 alkyl;

Rg is hydrogen, methyl, hydroxyl, tetrahydrofuran, tetrahydropyran, tetrahydrothiophene, tetrahydrothiopyran, C3-6 cycloalkyl, or a C4-6 cycloalkyl containing one or two unsaturated bonds, wherein the cycloalkyl and heterocyclic moieties may be optionally substituted by 1 to 3 methyl groups or one ethyl group; provided that a) when r is 1, n is 1 to 4; or b) when s is 1, n is 2 to 4; or c) when Rg is hydroxyl, r is 1, and n is 1 to 4, then m is 2; or d) when R8 is hydroxyl, and r or s is 0, then the sum of n + m is 2 to 6; or e) when m is 0, r is 1 in -(CR9Rlθ)n- (C(0)0)r -(CR9RlO)m-R8, then n is 1 to

4; or f) when Rg is a 2-tetrahydropyran or 2-tetrahydrothiopyran, 2-tetrahydrofuran or

2-tetrahydrothiophene, and r or s is 0, then the sum of n + m is 1 to 6; or g) when Rg is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or 2-tetrahydrothiophene, n is 1 to 4, and r is 1, then m must be 1 to 2; or h) when Rg is a 2-tetrahydropyran, 2-tetrahydrothiopyran, 2-tetrahydrofuran or 2-tetrahydrothiophene, n is 2 to 4, and s is 1, then m must be 1 to 2; X is YR2» halogen, nitro, NR6R7, or formyl amine; Y is O or S(0)_m'; m' is a number having a value of 0 to 2;

R2 is -CH3 or -CH2CH3 optionally substituted by 1 or more halogens;

R₃ is H, CH3, CN, CH2F, CHF2, or CF3;

R4 is H, C1-C4 alkyl, OH, OCH3, OCH₂CH₃, or OAc;

SUBSTITUTE SHEET R5 is H, OH, -(CH2 q^Ar« ^{or c}l-6 --ty- wherein the (CH2)_qAr or C . alkyl group is optionally substituted one or more times by F, Br, Cl, -NO2, -NRg , -CO2R6, -ORg, -OC(0)R6, C(0)R6, CN, -C(0)-NRgR7, -C(S)-NRgR7, -NRg-C(0)-NRgR7, -NRg-C(S)-NRgR7, - NRg-C(0)-Rg, - NR6-C(S)-R6, -NR6-C(0)-0R6, C(=NRg)-NRgR7, -C(=NCN)-NRgR7, -C(=NCN)-SR6, -NRg-C(=NCN)-SRg , -NRg-C(=NCN)-NRgR7, -C(=NRgR7)SRg, -NR6-S(0)2-R6, -S(0)_m'-R6, -NR6SO2-CF3, - NRgC(0)-C(0)-NRgR₇, -NR6-C(0)-C(0)-OR6, 1-imidazolyl, or l-(NR6)-2-imidazolyl ;

Ar is 2-, 3- or 4-pyridyl, pyrimidyl, pyrazyl, imidazolyl, moφholino, 4- or 5- thiazolyl, triazolyl, 2- or 3- thienyl, 2-thiaphene, or phenyl;

Rg and R7 are independently hydrogen, or Cι_4 alkyl optionally substituted by one or more halogens; q is a number having a value of 0 to 2; and the pharmaceutically acceptable salts thereof;

which process comprises

A. Oxidizing a compound of Formula (5)

wherein Ri, X, R3, R4, Rg are as defined for Formula (I), and R5 is H to an aldehyde oxime followed by reduction of the oxime to yield the corresponding Formula (5) compound wherein R5 is hydroxyl; followed by cyclization with a base and solvent to provide a compound of Formula (I) wherein R5 is H and R3 is other than CN; or

B . Reacting a compound of Formula (5), as described above, wherein R5 is H with an aldehyde followed by acid salt formation and reduction of the resulting iminium salt to provide a compound of Formula (5) wherein R3 is other than CN, R5 is other than H, followed by cyclization with base to yield a compound of Formula (I) wherein R3 is other than CN, R5 is other than H and X is other than Br, I, NO2, amine, formylamine, or S(0)m' and m is 1 or 2; or

TE SHEET C. Cyclizing a compound of Formula (5), as described above, wherein R4 and R5 are H and R3 is CONH2; followed by dehydration of the R3 amide to a nitrile provides a compound of Formula (I) wherein R4 and R5 are H and R3 is CN; or

D. Reacting a suitably protected amino moiety of Formula (5) wherein R4 and R5 • are H and R3 is CONH2, dehydrating the R3 amide to a nitrile, deprotecting the amine functionality to provide a compound of Formula (5) wherein R4 and R5 are H and R3 is CN; followed by cyclization to provide a compound of Formula ( ) wherein R4 is hydrogen, R5 is other then H and R3 is CN; or

F . Homologating the deprotected amine functionality of Formula (5) produced in step E. above; followed by cyclization to provide a compound of Formula (I) wherein R4 is hydrogen, R5 is other then H and R3 is CN;

F. Reacting a compound of Formula (6)

with phosgene in a solvent hi the presence of an acid scavenger to provide a compound of Formula (I) wherein R5 is H and R3 is other than CN; or

G . Reacting a compound of Formula (6) with N,N'-carbonyldiimidazole or 1 , 1 ,- carbonyldi-l,2,4-triazole in solvent to yield a compound of Formula (I) wherein R5 is H and R3 is other than CN; or

H . Reacting a compound of Formula (6) wherein R4 is H and R3 is CONH2 by cyclization followed by amide dehydration to provide a compound of Formula (I) wherein R4 and R5 are H and R3 is CN; or

I. Reacting a compound of the Formula (6), as described above, wherein the α-NH is protected, R5 is H, and R3 is not CN, followed by imine formation with the appropriate aldehyde, followed by imine or imminium ion reduction and deprotection of the α-NH, to provide a compound of Formula (6) in which R5 is other than H and R3 is other than CN; followed by any of steps F. to H. above to yield a compound of Formula (I).

EET

34. A compound of the formula

wherein

Rl, X, R3, R4, R5 and Rg are as defined for Formula (I).

35. The compounds according to Claim 33 which are: (2R)-l-Benzyloxycarbonylaπ_ino-2-(3-cyclopentyloxy-4- methoxyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane; or (2S)-l-Benzyloxycarbonylamino-2-(3-cyclopentyloxy-4- methojcyphenyl)-2-[(-)-menthyloxycarbonylamino]ethane.

36. A compound of the formula:

wherein X, Rl, R4, R3, and R5 are as defined for Formula (I).

SUBSTITUTE SHEET