Catalytic Performance of Imidazolide Basic Ionic Liquid in Knoevenagel Reactions in Aqueous Media

The synthesis and characterization of the basic ionic liquid,1-butyl-3-methylimidazolium imidazolide ([Bmim]Im),were reported intensively.[Bmim]Im has strong basicity and relatively good thermal stability,and it was used as a novel catalyst for the Knoevenagel reactions in aqueous media.[Bmim]Im acted as both a base catalyst and a phase transfer catalyst in the Knoevenagel reaction.In addition,[Bmim]Im together with aqueous media had good recycle ability.Aqueous media,low catalyst concentration,simple separation workup,ambient temperature,and high yield are the characteristic features of the present catalytic protocol.