PROCESS FOR THE PREPARATION OF 1,4-DIHYDROPYRIDINES AND NOVEL 1,4-DIHYDROPYRIDINES USEFUL AS THERAPEUTIC AGENTS

The present invention provides a process for the preparation of 1,4-dihydropyridines of the formula (1), wherein R>1< IS H, NO>2<, CL, OAC, OH, R>2< IS H, NO>2<, CL, -O-CH>2<-O-, OMe, OAc, OEt, OH, R>3< IS H, NO>2<, CL, N(ME)>2<, -O- CH>2< -O-, O...

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Main Authors BEDI, KASTURI, LAL, KHAJURIA, RAVI, KANT, DHAR, KANAYA, LAL, KAPOOR, VIJAY, KUMAR, MAHENDROO, NEERAJ
Format Patent
LanguageEnglish
French
Published 04.12.2003
Edition7
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Abstract The present invention provides a process for the preparation of 1,4-dihydropyridines of the formula (1), wherein R>1< IS H, NO>2<, CL, OAC, OH, R>2< IS H, NO>2<, CL, -O-CH>2<-O-, OMe, OAc, OEt, OH, R>3< IS H, NO>2<, CL, N(ME)>2<, -O- CH>2< -O-, OME, OAC, OH, R>4< IS H, OME, OAC, OH, R>5< IS H, CL, I, AND R>6< AND R>7< are either methyl, ethyl or both by preparing a mixture of an aromatic aldehyde, alkyl acetoacetate and a source of ammonia, adsorbing the prepared mixture and adsorbent till adsorbent becomes free flowing, heating the material so obtained under microwave irradiation, cooling the reaction mixture and recovering the compound of formula (1). The present invention also relates to novel 1,4-dihydropyridines with cardiovascular activity. L'invention concerne un procédé de préparation de 1,4-dihydropyridines de formule (1), dans laquelle : R1 représente H, NO2, Cl, OAc, OH ; R2 représente H, NO2, Cl, -O-CH2-O-, OMe, OAc, OEt, OH ; R3 représente H, NO2, Cl, N(Me)2, -O-CH2 -O-, OMe, OAc, OH ; R4 représente H, OMe, OAc, OH ; R5 représente H, Cl, l ; et R6 et R7 représentent méthyle, éthyle ou les deux. Ledit procédé consiste à préparer un mélange d'aldéhyde aromatique, d'acétoacétate d'alkyle et d'une source d'ammoniac ; à adsorber le mélange préparé sur l'adsorbant jusqu'à ce que ce dernier s'écoule facilement ; à chauffer le matériau ainsi obtenu par irradiation par micro-ondes ; à refroidir ledit mélange réactionnel et à récupérer le composé de formule (1). L'invention porte également sur des nouvelles 1,4-dihydropyridines agissant sur l'appareil cardiovasculaire.
AbstractList The present invention provides a process for the preparation of 1,4-dihydropyridines of the formula (1), wherein R>1< IS H, NO>2<, CL, OAC, OH, R>2< IS H, NO>2<, CL, -O-CH>2<-O-, OMe, OAc, OEt, OH, R>3< IS H, NO>2<, CL, N(ME)>2<, -O- CH>2< -O-, OME, OAC, OH, R>4< IS H, OME, OAC, OH, R>5< IS H, CL, I, AND R>6< AND R>7< are either methyl, ethyl or both by preparing a mixture of an aromatic aldehyde, alkyl acetoacetate and a source of ammonia, adsorbing the prepared mixture and adsorbent till adsorbent becomes free flowing, heating the material so obtained under microwave irradiation, cooling the reaction mixture and recovering the compound of formula (1). The present invention also relates to novel 1,4-dihydropyridines with cardiovascular activity. L'invention concerne un procédé de préparation de 1,4-dihydropyridines de formule (1), dans laquelle : R1 représente H, NO2, Cl, OAc, OH ; R2 représente H, NO2, Cl, -O-CH2-O-, OMe, OAc, OEt, OH ; R3 représente H, NO2, Cl, N(Me)2, -O-CH2 -O-, OMe, OAc, OH ; R4 représente H, OMe, OAc, OH ; R5 représente H, Cl, l ; et R6 et R7 représentent méthyle, éthyle ou les deux. Ledit procédé consiste à préparer un mélange d'aldéhyde aromatique, d'acétoacétate d'alkyle et d'une source d'ammoniac ; à adsorber le mélange préparé sur l'adsorbant jusqu'à ce que ce dernier s'écoule facilement ; à chauffer le matériau ainsi obtenu par irradiation par micro-ondes ; à refroidir ledit mélange réactionnel et à récupérer le composé de formule (1). L'invention porte également sur des nouvelles 1,4-dihydropyridines agissant sur l'appareil cardiovasculaire.
Author KHAJURIA, RAVI, KANT
DHAR, KANAYA, LAL
MAHENDROO, NEERAJ
KAPOOR, VIJAY, KUMAR
BEDI, KASTURI, LAL
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DocumentTitleAlternate PROCEDE DE PREPARATION DE 1,4-DIHYDROPYRIDINES ET NOUVELLES 1,4-DIHYDROPYRIDINES UTILES EN TANT QU'AGENTS THERAPEUTIQUES
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Snippet The present invention provides a process for the preparation of 1,4-dihydropyridines of the formula (1), wherein R>1< IS H, NO>2<, CL, OAC, OH, R>2< IS H,...
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SubjectTerms CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
Title PROCESS FOR THE PREPARATION OF 1,4-DIHYDROPYRIDINES AND NOVEL 1,4-DIHYDROPYRIDINES USEFUL AS THERAPEUTIC AGENTS
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