[EN] PROCESSES FOR THE PREPARATION OF ZOLPIDEM AND ITS HEMITARTRATE<br/>[FR] NOUVEAU POLYMORPHE D'HEMITARTRATE DE ZOLPIDEM
申请人:RANBAXY LAB LTD
公开号:WO2006008636A3
公开(公告)日:2006-08-17
[EN] NOVEL POLYMORPH OF ZOLPIDEM HEMITARTRATE<br/>[FR] NOUVEAU POLYMORPHE D'HEMITARTRATE DE ZOLPIDEM
申请人:RANBAXY LAB LTD
公开号:WO2006008636A2
公开(公告)日:2006-01-26
The invention relates to the preparation of a non-hygroscopic polymorphic form of zolpidem hemitartrate, designated as Form I, and pharmaceutical compositions including it. The invention also relates to use of the compositions for treating anxiety, sleep disorders and convulsions. The invention also relates to a process for the preparation of zolpidem or pharmaceutically acceptable salts thereof by condensing 3-bromo-N,N-dimethyl-4-oxo-4-p-tolyl-butyramide wih 2-amino-5-methylpyridine in a polar aprotic solvent.
[EN] PROCESS FOR THE SYNTHESIS OF ZOLPIDEM<br/>[FR] PROCEDE POUR LA SYNTHESE DE ZOLPIDEM
申请人:RANBAXY LAB LTD
公开号:WO2005010002A1
公开(公告)日:2005-02-03
The present invention relates to processes for the preparation of zolpidem of Formula V as shown in the accompanying drawings or pharmaceutically acceptable salts thereof from N, N-dimethyl-3-(4-methyl) benzoyl propionamide of Formula II. The process includes (a) reacting N,N-dimethyl-3-(4-methyl) benzoyl propionamide of Formula II with bromine to get the bromo amide of Formula III; (b) condensing the bromo amide of Formula III with 2-amino-5-methylpyridine of Formula IV to get the zolpidem base of Formula V; and (c) converting zolpidem base of Formula V to its hemitartarate salt of Formula VII.
Processes for the Preparation of Zolpidem and its Hemitartrate
申请人:Kumar Yatendra
公开号:US20080262025A1
公开(公告)日:2008-10-23
The invention relates to the preparation of a non-hygroscopic polymorphic form of zolpidem hemitartrate, designated as Form I, and pharmaceutical compositions including it. The invention also relates to use of the compositions for treating anxiety, sleep disorders and convulsions. The invention also relates to a process for the preparation of zolpidem or pharmaceutically acceptable salts thereof by condensing 3-bromo-N,N-dimethyl-4-oxo-4-p-tolyl-butyramide with 2-amino-5-methylpyridine in a polar aprotic solvent.