Ionic Liquid as Catalyst and Reaction Medium. The Dramatic Influence of a Task-Specific Ionic Liquid, [bmIm]OH, in Michael Addition of Active Methylene Compounds to Conjugated Ketones, Carboxylic Esters, and Nitriles
作者:Brindaban C. Ranu、Subhash Banerjee
DOI:10.1021/ol051004h
日期:2005.7.1
[reaction: see text] A task-specific ionic liquid, [bmIm]OH, has been introduced as a catalyst and as a reaction medium in Michael addition. Very interestingly, although the addition to alpha,beta-unsaturated ketones proceeds in the usual way, giving the monoaddition products, this ionic liquid always drives the reaction of open-chain 1,3-dicarbonyl compounds with alpha,beta-unsaturated esters and
[反应:见正文]在迈克尔加成反应中,已将一种特定任务的离子液体[bmIm] OH引入作为催化剂和反应介质。非常有趣的是,尽管以通常的方式添加α,β-不饱和酮,得到单加成产物,但这种离子液体始终驱动开链的1,3-二羰基化合物与α,β-不饱和酯和腈的反应。迈向双加成反应,仅需一步即可生产双加合物。