| 咪唑阴离子型碱性离子液体的合成及其催化Knoevenagel缩合反应 |
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| 引用本文： | 陈学伟,李雪辉,宋红兵,吕扬效,王芙蓉,胡艾希.咪唑阴离子型碱性离子液体的合成及其催化Knoevenagel缩合反应[J].催化学报,2008,29(10). |
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| 作者姓名： | 陈学伟 李雪辉 宋红兵 吕扬效 王芙蓉 胡艾希 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金，广东省广州市科技攻关项目 |
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| 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.
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| 关 键 词： | 咪唑阴离子 碱性离子液体 催化 Knoevenagel缩合反应 |
Synthesis of a Basic Imidazolide Ionic Liquid and Its Application in Catalyzing Knoevenagel Condensation |
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| CHEN Xuewei,LI Xuehui,SONG Hongbing,L Yangxiao,WANG Furong,HU Aixi.Synthesis of a Basic Imidazolide Ionic Liquid and Its Application in Catalyzing Knoevenagel Condensation[J].Chinese Journal of Catalysis,2008,29(10). |
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| Authors: | CHEN Xuewei LI Xuehui SONG Hongbing L Yangxiao WANG Furong HU Aixi |
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| Affiliation: | CHEN Xuewei,LI Xuehui,SONG Hongbing,L(U) Yangxiao,WANG Furong,HU Aixi |
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| Abstract: | 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. |
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| Keywords: | imidazolide anion basic ionic liquid catalysis Knoevenagel condensation |
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