[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.
Synthesis of n,n-dimethyl-3-(4-methyl) benzoyl propionamide a key intermediate of zolpidem
申请人:——
公开号:US20040054230A1
公开(公告)日:2004-03-18
The present invention relates to an improved and industrially advantageous process for the preparation of N, N-dimethyl-3-(4-methyl)benzoyl propionamide, which compound is a key intermediate for the synthesis of zolpidem hemitartrate, a non-benzodiazepine hypnotic agent.
本发明涉及一种制备 N, N-二甲基-3-(4-甲基)苯甲酰丙酰胺的改进型工业优势工艺,该化合物是合成非苯二氮卓催眠药--半酒石酸唑吡坦的关键中间体。
Hasegawa, Tadashi; Arata, Yoshiaki; Mizuno, Kouichi, Journal of the Chemical Society. Perkin transactions I, 1986, p. 541 - 544