acids;
aromatic substitution;
gold;
homogeneous catalysis;
Lewis acids;
Michael acceptors;
D O I:
10.1002/adsc.200303098
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
For the reaction of alpha,beta-unsaturated ketones with electron-rich arenes catalyzed by gold(III) chloride both, a Friedel-Crafts-type mechanism and an initial metallation, are evaluated. Gold(III) chloride has proven to be an efficient catalyst under very moderate reaction conditions, however, in the case of sterically demanding products HBF4 turned out to be the superior catalyst.