Asymmetric Synthesis of Chiral Chromanes by Copper‐Catalyzed Hydroamination of 2
<i>H</i>
‐Chromenes
作者:Qingjing Yang、Sifeng Li、Jun (Joelle) Wang
DOI:10.1002/cctc.202000601
日期:2020.6.18
A copper/(R )‐DTBM‐SEGPHOS‐catalyzed enantioselective hydroamination of 2H ‐chromenes employing hydrosilanes and hydroxylamine esters has been developed. This protocol offers a highly efficient and direct route for accessing a series of 4‐aminochromanes in 50–88 % yields with 59–99 % enantioselectivities under mild reaction conditions.