摘要
以(S)-α-乙基-氧代-1-吡咯烷乙酸为起始原料,在活化剂和氨气作用下,用两步一锅法制备左乙拉西坦。探讨了不同的活化剂、缚酸剂等因素对活性酯法成酰胺反应过程的影响,确定了最优物料投放比例;当以甲磺酰氯作为活化剂时,反应收率可达到约92.0%;改良后的工艺收率稳定,适合工厂工业化大规模生产。
Levetiracetam is prepared from (S)-alpha-ethyl-oxo-l-pyrrolidineacetic acid by the use of activating reagents and gaseous ammonia in one pot reaction. Bases on the influence of active ester method, the factors such as activating agents and bases were discussed, and then the optimal ratio of raw materials was determined. The yield can be about 92.0% using methane sulfonyl chloride as activating agent. The improved process is suitable for mass industrialized production.
出处
《华东理工大学学报(自然科学版)》
CAS
CSCD
北大核心
2013年第3期307-310,共4页
Journal of East China University of Science and Technology
关键词
左乙拉西坦
合成
工艺优化
levetiracetam
synthesis
process optimization