咪唑阴离子型碱性离子液体的合成及其催化Knoevenagel缩合反应  

Synthesis of a Basic Imidazolide Ionic Liquid and Its Application in Catalyzing Knoevenagel Condensation

作　　者：陈学伟[1] 李雪辉[2] 宋红兵[2] 吕扬效[2] 王芙蓉[2] 胡艾希[1] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082 [2]华南理工大学化学与化工学院,广东广州510640

出　　处：《催化学报》2008年第10期957-959,共3页

基　　金：国家自然科学基金(20876055);广州市科技攻关项目(2006Z3-E0671)

摘　　要：设计合成了由1-丁基-3-甲基咪唑阳离子与咪唑阴离子搭配的[bmim]Im新型碱性离子液体并对其碱性进行研究.[bmim]Im离子液体的碱性与[bmim]OH的碱性接近且强于[bmim]OAc.在水溶液及室温条件下,2%的[bmim]Im离子液体对系列芳香醛与活泼的亚甲基化合物之间的Knoevenagel缩合反应具有较好的催化性能,目标产物的收率达到86%～95%,选择性为100%.同时,该催化剂体系具有良好的循环性能.A novel basic ionic liquid paired by 1-butyl-3-methylimidazolium cation and imidazolide anion （[ bmim] Im） was synthesized and its basicity was investigated. The basicity of [bmim] Im approaches to that of [bmim]OH and is much stronger than that of [ bmim] OAc. In aqueous solution and under room temperature, 2 % of [ bmim ]Im showed well catalytic properties for Knoevenagel condensations between aromatic aldehyde and active methylene compounds with 86 %-95 % yield and 100% selectivity of ylidenemalononitriles. Experimental results showed that this kind of imidazolide ionic liquid has better recycle ability as well.

关 键 词：咪唑阴离子 碱性离子液体 催化 KNOEVENAGEL缩合反应 

分 类 号：O643.32[理学—物理化学]