Ionic Liquid as an Efficient Promoting Medium for Fixation of Carbon Dioxide: A Clean Method for the Synthesis of 5-Methylene-1,3-oxazolidin-2-ones from Propargylic Alcohols, Amines, and Carbon Dioxide Catalyzed by Cu(I) under Mild Conditions
作者:Yanlong Gu、Qinghua Zhang、Zhiying Duan、Juan Zhang、Shiguo Zhang、Youquan Deng
DOI:10.1021/jo050802i
日期:2005.9.1
The reactions of propargylic alcohols, aliphatic primary amines, and CO2 were conducted in CuCl/[BMIm]BF4 system to produce the corresponding 5-methylene-1,3-oxazolidin-2-ones under relatively mildconditions. The products could be conveniently isolated by means of liquid−liquid extraction. The solvent ionicliquid as well as CuCl catalyst can be recovered and reused three times without appreciable