The Catalytic Asymmetric Mukaiyama-Michael Reaction of Silyl Ketene Acetals with α,β-Unsaturated Methyl Esters
作者:Tim Gatzenmeier、Philip S. J. Kaib、Julia B. Lingnau、Richard Goddard、Benjamin List
DOI:10.1002/anie.201712088
日期:2018.2.23
α,β‐Unsaturated esters are readily available but challenging substrates to activate in asymmetric catalysis. We now describe an efficient, general, and highly enantioselective Mukaiyama–Michael reaction of silyl ketene acetals with α,β‐unsaturated methyl esters that is catalyzed by a silylium imidodiphosphorimidate (IDPi) Lewis acid.
α,β-不饱和酯很容易获得,但是在不对称催化下难以活化的底物。现在,我们描述甲硅烷基乙烯酮缩醛与α,β-不饱和甲酯的高效,一般和高度对映选择性的Mukaiyama-Michael反应,该反应由亚氨基二酰亚胺基次磷酸亚基(IDPi)路易斯酸催化。