Chemo/regioselective Aza-Michael additions of amines to conjugate alkenes catalyzed by polystyrene-supported AlCl3
作者:Liyan Dai、Yi Zhang、Qianqian Dou、Xiaozhong Wang、Yingqi Chen
DOI:10.1016/j.tet.2012.12.037
日期:2013.2
Aza-Michael additions of various amines with conjugate alkenes bearing electron withdrawing group catalyzed by polystyrene-supported aluminum chloride (Ps-AlCl3) without the use of any solvents. The catalyst shows high catalytic activity for both aromatic amines and aliphatic amines. Chemoselective additions of the two types of amines with conjugate alkenes are achieved. Regioselective additions of two
提出了一种简单有效的方法,可在不使用任何溶剂的情况下,通过聚苯乙烯负载的氯化铝(Ps-AlCl 3)催化各种带有带有吸电子基团的共轭烯烃的胺的Aza-Michael加成反应。该催化剂对芳族胺和脂族胺均显示出高催化活性。实现了两种胺与共轭烯烃的化学选择性加成。在一个分子中两个不同氨基的区域选择性加成反应顺利进行。Ps-AlCl 3具有更好的可回收性,可以重复使用几次,而不会明显丧失活性。