碱性离子液体催化的Claisen-Schmidt缩合反应  

Claisen-Schmidt Condensation Catalyzed by Basic Ionic Liquids

作　　者：王媛媛[1] 宫欣欣[1] 戴立益[1] 

机构地区：[1]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室上海200062

出　　处：《有机化学》2009年第9期1470-1473,共4页Chinese Journal of Organic Chemistry

基　　金：国家高技术研究发展计划(863计划)(No.2007AA05Z101)资助项目

摘　　要：合成了6种以N-甲基咪唑为基体的碱性离子液体,以其作为催化剂,在无溶剂条件下,成功催化了Claisen-Schmidt缩合反应.采用Hammett指示剂法对碱性离子液体的碱性强度和碱量进行表征.实验结果表明,此系列碱性离子液体对Claisen-Schmidt缩合反应具有较高的催化活性,反应条件温和,产物产率较高,离子液体经简单处理后可多次循环使用,催化活性未见明显降低.Six basic ionic liquids based on imidazolium were synthesized and used as catalysts in Claisen-Schmidt condensation. Hammett titration method was used to determine the basic strength and basic amount of these ionic liquids. Claisen-Schmidt condensation proceeded efficiently in these ionic liquids at room temperature and the ionic liquids could be reused at least 8 times without obvious activity loss.

关 键 词：碱性离子液体 Claisen—Schmidt缩合反应 碱性表征 催化 

分 类 号：O643.32[理学—物理化学]