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
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 alpha,beta-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. (C) 2004 Elsevier Ltd. All rights reserved.
An Expeditious Solvent Free Synthesis of Functionalised Thietanes by Nucleophile-Induced Cyclisation of<i>O</i>,<i>O</i>-Diethyl<i>S</i>-(1,3-Diaryl-3-oxopropyl) Phosphorodithioates
作者:Lal Dhar Yadav、Ritu Kapoor
DOI:10.1055/s-2002-33337
日期:——
An expeditious and highly diastereoselective synthesis of (Z)-2-alkylsulfenyl(or 2-cyano)-2,4-diarylthietanes 5a-i by nucleophile (CN - , RS - ) induced cyclisation of O,O-diethyl S-(1,3-diaryl-3-oxopropyl) phosphorodithioates 3a-c under microwave irradiation in solvent free conditions is reported.