[EN] PROCESS FOR THE PREPARATION OF OPTICALLY PURE 4-HYDROXY-2-OXO-1-PYRROLIDINE ACETAMIDE [FR] PROCEDE DE PREPARATION D'ACETAMIDE DE 4-HYDROXY-2-OXO-1-PYRROLIDINE OPTIQUEMENT PUR
[EN] PROCESS FOR THE PREPARATION OF OPTICALLY PURE 4-HYDROXY-2-OXO-1-PYRROLIDINE ACETAMIDE [FR] PROCEDE DE PREPARATION D'ACETAMIDE DE 4-HYDROXY-2-OXO-1-PYRROLIDINE OPTIQUEMENT PUR
[EN] PROCESS FOR THE PREPARATION OF OPTICALLY PURE 4-HYDROXY-2-OXO-1-PYRROLIDINE ACETAMIDE<br/>[FR] PROCEDE DE PREPARATION D'ACETAMIDE DE 4-HYDROXY-2-OXO-1-PYRROLIDINE OPTIQUEMENT PUR
申请人:AHN GOOK PHARMACEUTICAL CO LTD
公开号:WO2005115978A1
公开(公告)日:2005-12-08
The present invention relates to a process for the preparation of chiral 4-hydroxy-2-oxo-1-pyrrolidine acetamide. The process comprises adding sodium cyanide together with citric acid to a solution of chiral epichlorohydrin to obtain chiral 3-chloro-2-hydroxypropionitrile by ring opening reaction of the chiral epichlorohydrin, reacting the obtained product with an alcohol containing hydrochloride gas to obtain chiral 4-chloro-3-hydroxybutyric acid ester, and reacting the obtained product in a presence of a base with glycinamide or with glycine ester accompanied by ammonolysis with ammonia to produce the targeted chiral 4-hydroxy-2-oxo-1-pyrrolidine acetamide. The process according to the present invention provides optically pure 4-hydroxy-2-oxo-1-pyrrolidine acetamide in high yield and in high purity, which is suitable for industrial mass-production.