Copper-Catalyzed Asymmetric Hydroboration of 2<i>H</i>-Chromenes Using a Chiral Diphosphine Ligand
作者:Xiufen Li、Chaoqiong Wang、Jianqiao Song、Zhihong Yang、Guofu Zi、Guohua Hou
DOI:10.1021/acs.joc.9b01109
日期:2019.7.5
hydroboration of 2H-chromenes catalyzed by the complex of CuCl and diphosphine ligand (S,R)-DuanPhos has been realized under mild conditions to produce 3-boryl chromans, achieving good yields and excellent enantioselectivities up to 96% ee. This work provides an efficient approach to the synthesis of chiral 3-boryl chromans and derivatives.
CuCl和二膦配体(S,R)-DuanPhos的络合物催化的2 H-色烯的高度区域选择性不对称氢硼化已在温和条件下产生3-硼烷色氨酸,获得了良好的收率和高达96%ee的优异对映选择性。这项工作为合成手性3-硼基苯并二氢吡喃及其衍生物提供了一种有效的方法。