Electron-deficient olefins undergo smoothly aza-Michael reactions with a wide range of amines in ionic liquids in the absence of any acid catalyst to produce the corresponding β-amino compounds in excellent yields with high 1,4-selectivity. The recovered ionic liquids can be reused in subsequent reactions without loss of activity. Owing to the high polarity of ionic liquids, the enones show enhanced reactivity thereby reducing reaction times and improving the yields significantly.
缺电子烯烃在无任何酸催化剂的情况下,能顺利地在
离子液体中与多种
胺类进行aza-Michael反应,高效地生成高1,4-选择性的相应β-
氨基化合物。回收的
离子液体可在后续反应中重复使用,且活性无损失。由于
离子液体的高极性,使得烯酮表现出增强的反应活性,从而缩短反应时间,显著提高产率。