Silaborative Carbocyclizations of 1,7-Enynes. Diastereoselective Preparation of Chromane Derivatives
作者:You-Cai Xiao、Christina Moberg
DOI:10.1021/acs.orglett.5b03479
日期:2016.1.15
Palladium(0)-catalyzed carbocyclization of 1,7-enynes mediated by (chlorodimethylsilyl)pinacolborane proceeds with 1,8-addition of the silicon and boron functions to give functionalized cyclohexane derivatives with boron attached to the exocyclic olefin. A variety of chromane dervatives are accessible by this method. In contrast to the analogous reactions with 1,6-enynes, the configuration of the newly
由(氯二甲基甲硅烷基)频哪烷硼烷介导的钯(0)催化1,7-炔烃的碳环化反应是通过1,8-加成硅和硼官能进行的,得到官能化的环己烷衍生物,其中硼连接到环外烯烃上。通过该方法可得到各种苯并二氢吡喃衍生物。与与1,6-烯炔的类似反应相反,新形成的立体异构中心的构型由底物中存在的立体异构中心控制。