Rh‐Catalyzed Asymmetric Hydrogenation of α,β‐ and β,β‐Disubstituted Unsaturated Boronate Esters
作者:Qiaozhi Yan、Xin Shen、Guofu Zi、Guohua Hou
DOI:10.1002/chem.202000703
日期:2020.5.12
A highly enantioselective hydrogenation of α,β-unsaturated boronate esters catalyzed by Rh-(S)-DTBM-Segphos complex has been developed. Both (Z)-α,β- and β,β-disubstituted substrates can be successfully hydrogenated to afford chiral boronates with excellent enantioselectivities, up to 98 % ee. Furthermore, the obtained chiral boronate esters, as important versatile synthetic intermediates are successfully
已经开发了由Rh-(S)-DTBM-Segphos络合物催化的α,β-不饱和硼酸酯的高度对映选择性氢化。(Z)-α,β-和β,β-二取代的底物都可以成功氢化,以提供具有优异对映选择性(最高ee为98%)的手性硼酸酯。此外,将获得的手性硼酸酯作为重要的通用合成中间体成功地转化为相应的手性醇,胺和其他重要的具有对映选择性的重要衍生物。