Iridium-Catalyzed Asymmetric Hydrogenation of 2<i>H</i>-Chromenes: A Highly Enantioselective Approach to Isoflavan Derivatives
作者:Jingzhao Xia、Yu Nie、Guoqiang Yang、Yangang Liu、Wanbin Zhang
DOI:10.1021/acs.orglett.7b02341
日期:2017.9.15
A highly efficient (aS)-Ir/In-BiphPHOX-catalyzed asymmetric hydrogenation of substituted 2H-chromenes and substituted benzo[e][1,2]oxathiine 2,2-dioxides is described. A series of 2H-chromenes and benzo[e][1,2]oxathiine 2,2-dioxides were hydrogenated to give the target products in high yields (92–99%) with excellent enantioselectivities (up to 99.7% ee) using our catalytic system. This reaction provides
描述了一种高效的(S)-Ir / In-BiphPHOX催化的取代2 H-色烯和取代苯并[ e ] [1,2]草嘌呤2,2-二氧化物的不对称氢化反应。一系列2 H-色烯和苯并[ e ] [1,2]草嘌呤2,2-二氧化物被氢化,以高收率(92-99%)得到具有优异对映选择性(高达99.7%ee)的目标产物我们的催化系统。该反应为构建手性苯并六元含氧化合物提供了直接而有效的方法。