功能化离子液体在Knoevenagel缩合中的研究进展

Application of Task-Specific Ionic liquids to Knoevenagel Condensation

离子液体具备熔点低、不可燃性、热稳定性好、溶解性好、可设计性及可重复利用性等一系列优点,因此常以催化剂、溶剂的形式应用于有机合成领域中.从离子液体阳离子电荷中心所在位置的不同出发,分别介绍了近年来非环类、环类及负载型功能化离子液体在Knoevenagel缩合反应中的应用进展,并对功能化离子液体的结构特点、催化活性及某些催化剂可能的催化机理等方面展开了论述.

Ionic liquids （ILs） have been widely used as catalysts and/or reaction solutions in organic synthesis due to their low melting point, non-flammability, nice thermo stability, good solubility, strong design ability and good recyclability. Herein, according to the location of the cationic sites, the recent advances in the application of noncyclic, cyclic and supported ILs in Knoevenagel condensation are reviewed. Moreover, the structure, catalytic activity and probable reaction mechanism of ILs are also fully discussed.