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。