Organocatalytic, Highly Enantioselective Vinylogous Mukaiyama-Michael Reaction of Acyclic Dienol Silyl Ethers
作者:Vaishali Gupta、Sai Sudhir、Tanmay Mandal、Christoph Schneider
DOI:10.1002/anie.201207058
日期:2012.12.7
acyclic: The first catalytic, enantioselective, vinylogous Michael reaction of linear, acyclic dienol silyl ethers was achieved. The reaction, based upon the principle of iminium ion catalysis, delivered 1,7‐dioxo compounds in one step with good yields, complete regio‐, and excellent enantioselectivity. γ‐Substituted dienol silyl ethers furnished products with two new stereogenic centers with good diastereoselectivity
现在也是无环的:线性,无环二烯醇甲硅烷基醚的第一个催化,对映选择性,乙烯基迈克尔反应得以实现。根据亚胺离子催化原理,该反应可一步得到1,7-二氧代化合物,具有良好的收率,完全的区域选择性和出色的对映选择性。γ取代的二烯醇甲硅烷基醚为产品提供了两个具有良好非对映选择性的新的立体异构中心。Ms = mesityl,PNBA =对硝基苯甲酸。