[EN] SYNTHESIS OF PROPIVERINE HYDROCHLORIDE<br/>[FR] SYNTHÈSE DE CHLORHYDRATE DE PROPIVÉRINE
申请人:ANDAGAR RAMAKRISHNA RAMESHA
公开号:WO2011114195A1
公开(公告)日:2011-09-22
The present invention provides a two step esterification process for the synthesis of Propiverine hydrochloride. In the synthetic scheme disclosed herein benzillic acid 1 is directly converted to di-propyl ester ether 7 from the known standard method. The intermediate thus obtained is reacted with N-Methyl 4-hydroxy piperidine in the presence of sodium t-butoxide at room temperature to get Propiverine base 5. This is then finally converted to Propiverine hydrochloride. The process of synthesis provides Propiverine hydrochloride in a very pure form (>99%) with a very good yield. The compound is very useful in treating urinary incontinence.