Knoevenagel condensation of aromatic aldehydes with active methylene compounds such as malononitrile, ethylcyanoacetate, and cyanoacetamide proceeded very smoothly in reusable and cheap ionic liquid 2-hydroxyethylammonium formate at room temperature in the absence of a catalyst. Compared to other reported ionic liquids, the ionic liquid 2-hydroxyethylammonium formate shows better potential in the applications on the industrial scale with its low cost and viscosity.
芳香醛与活性亚甲基化合物(如马隆腈、乙基
氰乙酸酯和
氰乙酰胺)的Knoevenagel缩合在可重复使用且廉价的
离子液体2-羟基乙基
铵甲酸盐中,在室温下无催化剂的情况下进行得非常顺利。与其他报道的
离子液体相比,
离子液体2-羟基乙基
铵甲酸盐在工业规模应用中显示出更好的潜力,具有低成本和低粘度的优势。