PROCESS FOR PREPARING ZOLPIDEM AND ITS INTERMEDIATE

摘要

The present invention relates to an improved process for the preparation of 6- methyl-2-[4-methylphenyl]imidazo[l,2-a]pyridine-3-N,N-dimethyl acetamide having formula (1). The compound of formula (1) has adopted name "Zolpidem". The present invention also relates to novel intermediate of the formula (2) and a process for its preparation.Wherein R represents methyl, ethyl, propyl, butyl, isopropyl, isobutyl or tertiary butyl group. The novel intermediate of formula (2) is used in preparation of Zolpidem having formula (1). Zolpidem is useful in the treatment of anxiety, sleep disorders and convulsion.