In the presence of AlCl3 and MS 4 A containing H2O, ketene silyl acetals underwent 1,4- and then 1,2-addition with α,β-unsaturated imines to give doubly alkylated products in good yields with high diastereomeric excesses.
在含有H 2 O的AlCl 3和MS 4 A存在下,
乙烯酮甲
硅烷基
乙缩醛先进行1,4-加成,然后与α,β-不饱和
亚胺加成1,2-,以高收率得到双烷基化产物,且非对映异构体过量很高。