固载离子液体液膜/胍盐催化剂合成及在Henry反应中的应用  

Synthesis of Supported Ionic Liquid/Guanidinium Catalysts and Their Application in Henry Reaction

作　　者：张瑞[1] 易兵[1,2] 仇明华[1] 阳海[2] 党丽敏[2,3] 刘元[3] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]湖南工程学院化学化工学院,湖南湘潭411104 [3]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《湘潭大学自然科学学报》2012年第2期56-60,共5页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金项目(21172064);湖南省自然科学基金项目(10JJ2006);湖南省教育厅重点项目(10A022)

摘　　要：采用硅胶作为载体,通过对硅胶表面进行有机官能团化,制备了含五烷基胍盐的硅胶负载咪唑离子液体液膜催化剂.以2-硝基苯甲醛与硝基甲烷的Henry反应为模型,考察了催化反应条件,比较了不同催化剂的催化效能.结果表明,硅胶负载的咪唑乙酸盐离子液体液膜/N,N,N’,N’-四甲基-N"-丁基胍乙酸盐催化Henry反应时活性最高,产品收率可达94%.反应后经过简单的过滤就可实现催化剂的回收,在循环使用6次后催化活性基本保持不变.A series of Pentaalkyl-guanidinium salts were immobilized into the pores of modified silica with anchored ionic liquid phases. The immobilized catalyst system was studied for Henry reaction by choosing the carbon-carbon coupling of o-nitrobenzaldehyde and nitromethane as the model. The silica-supported imi dazol acetate ionic liquid immobilized N, N, N＇, N＇-tetramethyl-N＂-butylguanidinium acetate salt exhibited high catalytic activity in Henry reaction, and the isolated yield reached 94%. Moreover, the catalyst could be recovered by simple solid-liquid separation and reused six times without significant loss of activity.

关 键 词：Henry反应 固载离子液体 胍盐 固-液分离 

分 类 号：O621.251[理学—有机化学]