A facile and green strategy for the Knoevenagel condensation reaction of aryl aldehydes and active methylene compounds using [Bmim][CF3COO] ionic liquid as a solvent and a catalyst has been introduced. The method features some advantages such as good to excellent yield of products, relatively short reaction time, mild reaction conditions, broad substrate scope, and scalability. Moreover, the ionic liquid solvent could be conveniently recycled and reused up to three times without any considerable loss of catalytic activity. Twelve products were obtained in high yields, and their structures were confirmed by NMR data. A plausible reaction mechanism involving the role of the ionic liquid catalyst was also suggested.

中文翻译：

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[Bmim][CF3COO] 作为 Knoevenagel 缩合的溶剂和催化剂

介绍了一种使用[Bmim][CF3COO]离子液体作为溶剂和催化剂进行芳基醛与活性亚甲基化合物的Knoevenagel缩合反应的简便且绿色的策略。该方法具有产物收率良好至优异、反应时间较短、反应条件温和、底物范围广、可扩展等优点。此外，离子液体溶剂可以方便地回收并重复使用多达三次，而催化活性不会有任何显着损失。以高产率获得了12种产物，其结构通过NMR数据得到证实。还提出了涉及离子液体催化剂作用的合理反应机制。