Catalysis by ionic liquid: a simple, green and efficient procedure for the Michael addition of thiols and thiophosphate to conjugated alkenes in ionic liquid, [pmIm]Br
- 作者：Ranu ; Brindaban C. ; Dey ; Suvendu S.
- 关键词：Michael addition ; Thiol ; Thiophosphate ; Ionic liquid ; Green catalysis
- 刊名：Tetrahedron
- 出版年：2004
- 期刊代码：107_00404020
- 类别：ch
- 出版时间：May 3, 2004
- 卷：60
- 期：19
- 页码：4183-4188
- 文件大小：146 K
摘要
A room temperature ionic liquid, 1-pentyl-3-methylimidazolium bromide, [pmIm]Br efficiently catalyzes Michael addition of thiols and diethyl dithiophosphate to a variety of conjugated alkenes such as α,β-unsaturated carbonyl compounds, carboxylic esters, nitriles and chalcones without requiring any other organic solvent and catalyst. The ionic liquid can be recycled for subsequent reactions without any appreciable loss of efficiency.