A convenient approach for vinylation reaction in the synthesis of 5-vinyl-2-pyrrolidinone, a key intermediate of vigabatrin
作者:Kishore Karumanchi、Senthil Kumar Natarajan、Sunil Gadde、Krishna Vanchanagiri
DOI:10.1007/s11696-019-01030-2
日期:2020.6
A convenient, safe and cost-effective method for carrying out the key vinylation of 5-ethoxy-2-pyrrolidinone (8) in the preparation of 5-vinyl-2-pyrrolidinone (2) in the presence of potassium carbonate is described. This present procedure is developed by replacing inherently hazardous ethyl magnesium bromide with inexpensive and eco-friendly potassium carbonate. The reaction was performed on a multi-gram
描述了一种在碳酸钾存在下在制备5-乙烯基-2-吡咯烷酮(2)中进行5-乙氧基-2-吡咯烷酮(8)的关键乙烯基化的方便,安全且经济的方法。通过用廉价且生态友好的碳酸钾替代本质上有害的乙基溴化镁来开发本程序。以乙烯基溴化镁作为乙烯基化试剂,以克数进行反应,产率为81%,得到纯度优异且无需色谱法的5-乙烯基-2-吡咯烷酮。