咪唑根碱性离子液体在水介质Knoevenagel反应中的催化作用  

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

作　　者：陈学伟[1] 宋红兵[1] 李雪辉[1] 王芙蓉[1] 钱宇[1] 

机构地区：[1]华南理工大学化学与化工学院,制浆造纸工程国家重点实验室,广东广州510640

出　　处：《催化学报》2011年第4期693-698,共6页

基　　金：国家自然科学基金(20876055,20906029)~~

摘　　要：报道了咪唑根1-丁基-3-甲基咪唑([Bmim]Im)碱性离子液体的合成与表征,该离子液体具有强碱性和较好的热稳定性.碱性离子液体[Bmim]Im用于催化水介质中Knoevenagel反应,发挥了碱催化剂与相转移催化剂双重作用.此外,离子液体[Bmim]Im及其水溶液还具有良好的循环使用性能.水介质、低催化剂用量、室温与高收率、简单的后处理操作是该催化体系的主要特点.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.

关 键 词：咪唑根 碱性 离子液体 水介质 KNOEVENAGEL反应 

分 类 号：O643.32[理学—物理化学]