[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.
本发明涉及一种制备手性4-羟基-2-氧代-1-吡咯烷乙酰胺的工艺。该工艺包括将氰化钠与柠檬酸一起加入手性环氧氯丙烷的溶液中,通过环氧氯丙烷的开环反应得到手性3-氯-2-羟基丙腈,将所得产物与含有盐酸气体的醇反应得到手性4-氯-3-羟基丁酸酯,然后在碱存在下将所得产物与甘氨酰胺或甘氨酯伴随氨气的氨解反应得到目标手性4-羟基-2-氧代-1-吡咯烷乙酰胺。本发明的工艺能够高产高纯度地提供光学纯的4-羟基-2-氧代-1-吡咯烷乙酰胺,适用于工业大规模生产。