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.
本发明涉及从式II中N,N-二
甲基-3-(4-
甲基)
苯甲酰丙
酰胺制备Zolpidem的过程,所示为伴随图示或其药用可接受盐,所述过程包括(a)将式II中的N,N-二
甲基-3-(4-
甲基)
苯甲酰丙
酰胺与
溴反应,得到式III的
溴酰胺;(b)将式III的
溴酰胺与式IV的2-
氨基-5-
甲基吡啶缩合,得到式V的Zolpidem碱;以及(c)将式V的Zolpidem碱转化为其
酒石酸半盐,式VII。