[EN] PROCESS FOR THE PREPARATION OF ESTERS OF PIPERAZIC ACID<br/>[FR] PROCEDE DE PREPARATION D'ESTERS D'ACIDE PIPERAZIQUE
申请人:RANBAXY LAB LTD
公开号:WO2005122682A2
公开(公告)日:2005-12-29
The present invention provides simple and cost effective processes to prepare esters of piperazic acid, which can be useful as intermediates in synthesizing cilazapril. Key feature is treating 2, 5-dibromovaleric acid with tert-butanol in the presence of acid catalyst.