Activation of ketene silyl acetals by 10-methylacridinium perchlorate: a novel catalysis in mukaiyama reaction
作者:Junzo Otera、Yoshiyuki Wakahara、Hidenobu Kamei、Tsuneo Sato、Hitosi Nozaki、Shinichi Fukuzumi
DOI:10.1016/s0040-4039(00)79935-7
日期:1991.5
10-Methylacridinium perchlorate (1) effectively promotes various reactions of ketene silyl acetals: aldol and Michael addition products are obtained with aldehydes, ketones, acetals, and α-enones. The reactions exhibit unusual dependency upon 1, namely the yields are excellent when a catalytic amount of 1 is employed whereas no desired products are accessible by the use of 1 in a stoichiometric quantity
10-甲基ac啶高氯酸盐(1)有效地促进乙烯酮甲硅烷基乙缩醛的各种反应:醛,酮,乙缩醛和α-烯酮可得到醛醇和迈克尔加成产物。反应表现出对1的不寻常依赖性,即当使用催化量1时,收率优异,而通过使用化学计量的1不能获得所需产物。提出了一种新颖的催化循环。