室温离子液体作为微波吸收剂用于促进Knoevenagel反应

Room Temperature Ionic Liquids Used as Microwave Absorbent to Promote the Knoevenagel Reaction

采用催化量的室温离子液体正丁基吡啶硝酸盐 ( [BPy]NO3 ) ,1 正丁基 3 甲基咪唑四氟硼酸盐 ( [bmim]BF4)和1 正丁基 3 甲基咪唑六氟磷酸盐 ( [bmim]PF6)作为微波吸收剂 (敏化剂 ) ,在微波辐射下能顺利地促使一系列芳醛与活泼亚甲基化合物进行Knoevenagel缩合反应 ,以中等到良好产率生成相应E 式烯烃 .

The room temperature ionic liquids n butyl pyridinium nitrate (NO 3), 1 n butyl 3 me^thy^lim^mi^da^zo^lium tetrafluoroborate (BF 4) and 1 n butyl 3 methylimmidazolium hexafluorophosphate (PF 6) were used as microwave absorbent (sensitizer) for the Knoevenagel condensation under microwave irradiation. The condensation proceeded smoothly in the presence of catalytic amount of ionic liquid to afford the desired E isomers of the corresponding alkenes in high purity with moderate to ...