Synthesis of Silyloxy Dienes by Silylene Transfer to Divinyl Ketones: Application to the Asymmetric Synthesis of Substituted Cyclohexanes
作者:Christian C. Ventocilla、K. A. Woerpel
DOI:10.1021/jo202650k
日期:2012.4.6
to divinyl ketones provided 2-silyloxy-1,3-dienes with control of stereochemistry and regioselectivity. The products participated in Diels–Alder reactions with electron-deficient alkenes and imines to form six-membered-ring products diastereoselectively. Cycloaddition reactions with alkenes bearing chiral auxiliaries provided access to chiral, nonracemic cyclohexenes. The methodology, therefore, represents
银催化的亚甲硅基转移到二乙烯基酮,提供了具有立体化学和区域选择性控制的 2-甲硅烷氧基-1,3-二烯。该产物参与与缺电子烯烃和亚胺的狄尔斯-阿尔德反应,非对映选择性地形成六元环产物。与带有手性助剂的烯烃的环加成反应提供了获得手性非外消旋环己烯的途径。因此,该方法代表在单个烧瓶中合成非对映体和对映体纯产物。高度取代的环己烯产物可以在碳-硅键氧化后进行立体选择性官能化以提供环己醇。