NL193246C - Process for the preparation of imazobenzodiazepines and their salts. - Google Patents
Process for the preparation of imazobenzodiazepines and their salts. Download PDFInfo
- Publication number
- NL193246C NL193246C NL8201208A NL8201208A NL193246C NL 193246 C NL193246 C NL 193246C NL 8201208 A NL8201208 A NL 8201208A NL 8201208 A NL8201208 A NL 8201208A NL 193246 C NL193246 C NL 193246C
- Authority
- NL
- Netherlands
- Prior art keywords
- formula
- nitro
- chlorophenyl
- liters
- methylene chloride
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- 150000003839 salts Chemical class 0.000 title claims description 7
- 238000002360 preparation method Methods 0.000 title claims description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 36
- 150000001875 compounds Chemical class 0.000 claims description 26
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- -1 6- (o-chlorophenyl) 1 H, 4H-imidazo [1,2-a] [1,4] benzodiazepin-1-one Chemical compound 0.000 claims description 5
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 4
- 125000005843 halogen group Chemical group 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- PVOAHINGSUIXLS-UHFFFAOYSA-N 1-Methylpiperazine Chemical compound CN1CCNCC1 PVOAHINGSUIXLS-UHFFFAOYSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 150000007522 mineralic acids Chemical class 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- IZYKFSZYKIUTTE-UHFFFAOYSA-N 5-(2-chlorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepine-2-thione Chemical compound C12=CC([N+](=O)[O-])=CC=C2NC(=S)CN=C1C1=CC=CC=C1Cl IZYKFSZYKIUTTE-UHFFFAOYSA-N 0.000 claims description 2
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004471 Glycine Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 125000001316 cycloalkyl alkyl group Chemical group 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- 125000004194 piperazin-1-yl group Chemical group [H]N1C([H])([H])C([H])([H])N(*)C([H])([H])C1([H])[H] 0.000 claims description 2
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- SPEUIVXLLWOEMJ-UHFFFAOYSA-N 1,1-dimethoxyethane Chemical compound COC(C)OC SPEUIVXLLWOEMJ-UHFFFAOYSA-N 0.000 claims 8
- 125000004182 2-chlorophenyl group Chemical group [H]C1=C([H])C(Cl)=C(*)C([H])=C1[H] 0.000 claims 8
- QQUIWIVTEWQHKA-UHFFFAOYSA-N 3h-1,4-benzodiazepine Chemical compound C1=NCC=NC2=CC=CC=C21 QQUIWIVTEWQHKA-UHFFFAOYSA-N 0.000 claims 3
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 3
- IBYCDDNFZLAIAO-UHFFFAOYSA-N 2,4-dihydroimidazo[1,2-a][1,4]benzodiazepin-1-one Chemical compound C1N=CC2=CC=CC=C2N2C(=O)CN=C21 IBYCDDNFZLAIAO-UHFFFAOYSA-N 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims 2
- 239000008346 aqueous phase Substances 0.000 claims 2
- 239000012071 phase Substances 0.000 claims 2
- VFTOHJFKIJLYKN-UHFFFAOYSA-N 7-nitro-9h-fluoren-2-ol Chemical group [O-][N+](=O)C1=CC=C2C3=CC=C(O)C=C3CC2=C1 VFTOHJFKIJLYKN-UHFFFAOYSA-N 0.000 claims 1
- 239000012043 crude product Substances 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims 1
- 235000017557 sodium bicarbonate Nutrition 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 2
- KLNFAMGHSZQYHR-UHFFFAOYSA-N imidazo[4,5-i][1,2]benzodiazepine Chemical class C1=CC=NN=C2C3=NC=NC3=CC=C21 KLNFAMGHSZQYHR-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- IVLIBVDZIYFXBZ-UHFFFAOYSA-N 1-(cyclopropylmethyl)piperazine Chemical compound C1CNCCN1CC1CC1 IVLIBVDZIYFXBZ-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002921 anti-spasmodic effect Effects 0.000 description 1
- 239000002249 anxiolytic agent Substances 0.000 description 1
- 230000000949 anxiolytic effect Effects 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 239000000812 cholinergic antagonist Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000147 hypnotic effect Effects 0.000 description 1
- YZTJYBJCZXZGCT-UHFFFAOYSA-N phenylpiperazine Chemical group C1CNCCN1C1=CC=CC=C1 YZTJYBJCZXZGCT-UHFFFAOYSA-N 0.000 description 1
- 239000000932 sedative agent Substances 0.000 description 1
- 230000001624 sedative effect Effects 0.000 description 1
- 230000002936 tranquilizing effect Effects 0.000 description 1
- 238000007056 transamidation reaction Methods 0.000 description 1
- 238000005891 transamination reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Plural Heterocyclic Compounds (AREA)
Description
1 1932461 193246
Werkwijze voor de bereiding van imidazobenzodiazepinen en hun zoutenProcess for the preparation of imidazobenzodiazepines and their salts
De uitvinding heeft betrekking op een werkwijze voor de bereiding van verbindingen met de algemene formule 1 van het formuleblad, waarin R, een waterstofatoom, een halogeenatoom, een nitrogroep of een 5 trifluormethylgroep en R2 een waterstofatoom of een halogeenatoom voorstelt, en R3 en R4 tezamen met het stikstofatoom, waaraan zij gebonden zijn, een 4-alkylpiperazin-1-yl, 4-(cycloalkyl-alkyl)piperazin-1-yl-, 4-fenylpiperazin-1-yl- of piperidinogroep vormen en hun additiezouten met anorganische of organische zuren, uitgaande van een verbinding met formule 2 van het formuleblad, waarin R1 en R2 de eerdergenoemde betekenissen bezitten, onder toepassing van een dialkylketaal van een N-formylamine.The invention relates to a process for the preparation of compounds of the general formula 1 of the formula sheet, wherein R 1 represents a hydrogen atom, a halogen atom, a nitro group or a trifluoromethyl group and R 2 represents a hydrogen atom or a halogen atom, and R 3 and R 4 together with the nitrogen atom to which they are attached form a 4-alkylpiperazin-1-yl, 4- (cycloalkyl-alkyl) piperazin-1-yl, 4-phenylpiperazin-1-yl or piperidino group and their addition salts with inorganic or organic acids, starting from a compound of formula 2 of the formula sheet, wherein R 1 and R 2 have the aforementioned meanings, using a dialkyl ketal of an N-formylamine.
10 De werkwijze voor de bereiding daarvoor is beschreven in het Franse octrooischrift no. 2.300.569 ten name van aanvraagster. Zoals vermeld is in dit octrooischrift, bezitten de verbindingen met de algemene formule 1 sedatieve, hypnotische, anxiolytische, tranquilliserende, krampwerende en myorelaxerende eigenschappen.The process for its preparation is described in French Patent No. 2,300,569 in the name of the Applicant. As stated in this patent, the compounds of the general formula 1 have sedative, hypnotic, anxiolytic, tranquilizing, antispasmodic and myorelaxing properties.
Wanneer R3 en R4 elk een methylgroep betekenen kan een verbinding volgens formule 1 worden bereid 15 door 8-R,-1,2-dihydro-6-(R2-fenyl)-1 H,4H-imidazo[1,2-a][1,4J-benzodiazepine-1 -on (formule 2) te laten reageren in een watervrij organisch oplosmiddel, in aanwezigheid van een stikstofbase zoals triethylamine, met een dimethylformamide-dialkylacetaal. Door transamineren kunnen de methylgroepen van R3 en R4 vervangen worden door bijv. een N-methylpiperazine, een piperidine, een N-(cyclopropyl-methyl)piperazine of een N-fenylpiperazinegroep.When R3 and R4 each represent a methyl group, a compound of formula 1 can be prepared by 8-R, -1,2-dihydro-6- (R2-phenyl) -1H, 4H-imidazo [1,2-a] [1,4J-Benzodiazepine-1-one (Formula 2) to react in an anhydrous organic solvent, in the presence of a nitrogen base such as triethylamine, with a dimethylformamide dialkyl acetal. By transamination, the methyl groups of R3 and R4 can be replaced by, for example, an N-methylpiperazine, a piperidine, an N- (cyclopropyl-methyl) piperazine or an N-phenylpiperazine group.
20 De nieuwe werkwijze volgens de uitvinding maakt het mogelijk om de verbindingen met formule 1 te bereiden met goede opbrengsten door eerst het dimethylformamide-dialkylacetaal te transamineren en vervolgens de imidazobenzodiazepine met formule 2 te substitueren.The new method according to the invention makes it possible to prepare the compounds of formula 1 with good yields by first transaminating the dimethylformamide dialkylacetal and then substituting the imidazobenzodiazepine of formula 2.
Volgens de werkwijze der uitvinding wordt de omzetting van de uitgangsverbinding met formule 2 in de verbinding met formule 1 in één trap uitgevoerd, en is de opbrengst aan de verbinding met formule 1 met 25 betrekking tot de uitgangsverbinding met formule 2 hoger dan bij de in het Franse octrooischrift 2.300.569 beschreven werkwijze, waarbij de uitgangsverbinding met formule 2 onderworpen wordt aan twee reactie-trappen. Bijvoorbeeld bedraagt de totale opbrengst van de onderhavige werkwijze uitgaande van 7-nitro-1,3-dihydro-5(o-chloorfenyl)-2H-[1,4]-benzodiazepine-2-thion (de uitgangsverbinding van trap A van het hierna volgende voorbeeld) ter verkrijging van het eindproduct van dit voorbeeld 79,8%, terwijl de werkwijze 30 volgens het Franse octrooischrift 2.300.569 slechts een opbrengst van 39,5% van hetzelfde product uitgaande van hetzelfde thion levert.According to the process of the invention, the conversion of the starting compound of formula 2 into the compound of formula 1 is carried out in one step, and the yield of the compound of formula 1 with respect to the starting compound of formula 2 is higher than in the French Patent 2,300,569 describes the process wherein the starting compound of formula 2 is subjected to two reaction steps. For example, the total yield of the present process starting from 7-nitro-1,3-dihydro-5 (o-chlorophenyl) -2H- [1,4] benzodiazepine-2-thione (the starting compound of Step A of the following following example) to obtain the final product of this example 79.8%, while the method of French patent 2,300,569 yields only a yield of 39.5% of the same product starting from the same thion.
De uitvinding zoals in de aanhef is omschreven wordt daardoor gekenmerkt, dat men een verbinding met formule 2 van het formuleblad, waarin R, en R2 de eerdergenoemde betekenissen bezitten, laat reageren met een amine met de formule 3 van het formuleblad, waarin alk een alkylgroep met 1-3 koolstofatomen 35 voorstelt en R3 en R4 de eerdergenoemde betekenissen bezitten, in een organisch oplosmiddel onder vorming van de gewenste verbinding met formule 1, die men eventueel omzet in een zout. Opgemerkt wordt, dat transamidering van diethylacetaal van dimethylformamide met bijv. piperidine door langzaam verhitten van beide verbindingen op 190°C bekend is uit Chem. Abstr. 55, 18763 b-e (1961).The invention as described in the preamble is characterized in that a compound of formula 2 of the formula sheet, in which R 1 and R 2 have the aforementioned meanings, is reacted with an amine of the formula 3 of the formula sheet, in which alk is an alkyl group with 1-3 carbon atoms and R3 and R4 have the aforementioned meanings, in an organic solvent to form the desired compound of formula 1, which is optionally converted into a salt. It is noted that transamidation of diethyl acetal of dimethylformamide with e.g. piperidine by slowly heating both compounds to 190 ° C is known from Chem. Abstr. 55, 18763 b-e (1961).
Onder voorkeursuitvoeringsomstandigheden van de werkwijze der uitvinding wordt de reactie van de 40 verbinding met formule 2 met de verbinding met formule 3 uitgevoerd in een organisch oplosmiddel zoals methyleenchloride en in aanwezigheid van triethylamine.Under preferred operating conditions of the process of the invention, the reaction of the compound of formula 2 with the compound of formula 3 is carried out in an organic solvent such as methylene chloride and in the presence of triethylamine.
De additiezouten van de verbindingen met formule 1 met zuren kunnen bereid worden door de verbindingen met formule 1 te laten reageren met een stoechiometrische hoeveelheid van een anorganisch of organisch zuur. De reactie wordt bij voorkeur uitgevoerd in een organisch oplosmiddel of een mengsel van 45 organische oplosmiddelen zoals methanol, ethanol of methyleenchloride.The addition salts of the compounds of formula 1 with acids can be prepared by reacting the compounds of formula 1 with a stoichiometric amount of an inorganic or organic acid. The reaction is preferably carried out in an organic solvent or a mixture of 45 organic solvents such as methanol, ethanol or methylene chloride.
Zoals vermeld in het Franse octrooischrift 2.300.569 kunnen de verbindingen met formule 2 bereid worden uit een verbinding met formule 4 van het formuleblad, waarin R, en R2 de eerdergenoemde betekenissen bezitten, door reactie met glycine ter vorming van een verbinding met formule 5 van het formuleblad, waarin R, en R2 de eerdergenoemde betekenissen bezitten, die men dehydrateert ter vorming 50 van de gewenste verbinding met formule 2.As stated in French Pat. No. 2,300,569, the compounds of formula 2 can be prepared from a compound of formula 4 of the formula sheet, wherein R 1 and R 2 have the aforementioned meanings, by reaction with glycine to form a compound of formula 5 of the formula sheet wherein R 1 and R 2 have the aforementioned meanings which are dehydrated to form the desired compound of formula 2.
De dehydratatie kan met voordeel uitgevoerd worden met behulp van een carbodiimide zoals dicyclo-hexylcarbodiimide.Dehydration can advantageously be carried out using a carbodiimide such as dicyclohexylcarbodiimide.
Wanneer de verbindingen met formule 3 niet bekend zijn, kunnen ze bereid worden door reactie van een verbinding met formule 6 van het formuleblad, waarin R3 en R4 de eerdergenoemde betekenissen bezitten, 55 met een alkylketaal van dimethylformamide.When the compounds of formula 3 are not known, they can be prepared by reacting a compound of formula 6 of the formula sheet, wherein R 3 and R 4 have the aforementioned meanings, 55 with an alkyl ketal of dimethylformamide.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8106171 | 1981-03-27 | ||
FR8106171A FR2502621B1 (en) | 1981-03-27 | 1981-03-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
NL8201208A NL8201208A (en) | 1982-10-18 |
NL193246B NL193246B (en) | 1998-12-01 |
NL193246C true NL193246C (en) | 1999-04-02 |
Family
ID=9256708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL8201208A NL193246C (en) | 1981-03-27 | 1982-03-23 | Process for the preparation of imazobenzodiazepines and their salts. |
Country Status (17)
Country | Link |
---|---|
JP (1) | JPS57169483A (en) |
AU (1) | AU549222B2 (en) |
CA (1) | CA1175823A (en) |
CH (1) | CH651565A5 (en) |
DE (1) | DE3211243A1 (en) |
DK (1) | DK153404C (en) |
ES (1) | ES509284A0 (en) |
FI (1) | FI71152C (en) |
FR (1) | FR2502621B1 (en) |
GB (1) | GB2095674B (en) |
HU (1) | HU185092B (en) |
IT (1) | IT1147917B (en) |
MA (1) | MA19416A1 (en) |
NL (1) | NL193246C (en) |
PT (1) | PT74669B (en) |
SE (2) | SE8200271L (en) |
ZA (1) | ZA821141B (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872090A (en) * | 1972-07-12 | 1975-03-18 | Boehringer Sohn Ingelheim | 3-(amino-methylene)-5-phenyl-1,4-benzodiazepin-2-ones |
IL48888A (en) * | 1975-02-15 | 1979-03-12 | Roussel Uclaf | 2-aminomethylene-1,2-dihydro-6-phenyl-1h-imidazo(1,2-a)(1,4) benzodiazepin-1-ones, process for their preparation andpharmaceutical compositions incorporating them |
-
1981
- 1981-03-27 FR FR8106171A patent/FR2502621B1/fr not_active Expired
-
1982
- 1982-01-19 SE SE8200271D patent/SE8200271L/en not_active Application Discontinuation
- 1982-01-19 SE SE8200271A patent/SE448731B/en not_active IP Right Cessation
- 1982-02-03 ES ES509284A patent/ES509284A0/en active Granted
- 1982-02-22 ZA ZA821141A patent/ZA821141B/en unknown
- 1982-02-26 AU AU80947/82A patent/AU549222B2/en not_active Expired
- 1982-03-18 MA MA19621A patent/MA19416A1/en unknown
- 1982-03-19 IT IT48036/82A patent/IT1147917B/en active
- 1982-03-23 NL NL8201208A patent/NL193246C/en not_active IP Right Cessation
- 1982-03-24 JP JP57045728A patent/JPS57169483A/en active Pending
- 1982-03-25 FI FI821058A patent/FI71152C/en not_active IP Right Cessation
- 1982-03-26 DE DE19823211243 patent/DE3211243A1/en active Granted
- 1982-03-26 PT PT74669A patent/PT74669B/en unknown
- 1982-03-26 CA CA000399537A patent/CA1175823A/en not_active Expired
- 1982-03-26 CH CH1896/82A patent/CH651565A5/en not_active IP Right Cessation
- 1982-03-26 GB GB8208933A patent/GB2095674B/en not_active Expired
- 1982-03-26 DK DK138682A patent/DK153404C/en not_active IP Right Cessation
- 1982-03-26 HU HU82939A patent/HU185092B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PT74669B (en) | 1985-01-08 |
DE3211243C2 (en) | 1993-05-19 |
FR2502621A1 (en) | 1982-10-01 |
MA19416A1 (en) | 1982-10-01 |
ES8302712A1 (en) | 1983-01-16 |
AU549222B2 (en) | 1986-01-23 |
DK153404B (en) | 1988-07-11 |
IT8248036A0 (en) | 1982-03-19 |
FI71152C (en) | 1986-11-24 |
ES509284A0 (en) | 1983-01-16 |
CH651565A5 (en) | 1985-09-30 |
ZA821141B (en) | 1983-01-26 |
CA1175823A (en) | 1984-10-09 |
DE3211243A1 (en) | 1982-10-07 |
FI821058L (en) | 1982-09-28 |
HU185092B (en) | 1984-11-28 |
GB2095674A (en) | 1982-10-06 |
FR2502621B1 (en) | 1983-10-28 |
NL8201208A (en) | 1982-10-18 |
SE448731B (en) | 1987-03-16 |
DK138682A (en) | 1982-09-28 |
AU8094782A (en) | 1982-09-30 |
FI821058A0 (en) | 1982-03-25 |
SE8200271L (en) | 1982-09-28 |
FI71152B (en) | 1986-08-14 |
GB2095674B (en) | 1984-10-10 |
DK153404C (en) | 1988-11-21 |
IT1147917B (en) | 1986-11-26 |
PT74669A (en) | 1982-04-01 |
JPS57169483A (en) | 1982-10-19 |
NL193246B (en) | 1998-12-01 |
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