Chiral Dirhodium Tetraphosphate-Catalyzed Enantioselective Si–H Bond Insertion of α-Aryldiazoacetates
作者:Liang-Liang Yang、Jin Cao、Tian-Yuan Zhao、Shou-Fei Zhu、Qi-Lin Zhou
DOI:10.1021/acs.joc.1c00967
日期:2021.7.16
A highly enantioselective Si–H bond insertion reaction of α-aryldiazoacetates catalyzed by chiral spiro dirhodium tetraphosphate was developed. Various chiral α-silyl esters were prepared with high yield (up to 92%) and excellent enantioselectivity (up to >99% ee) through this protocol. It is noteworthy that the 2-substituted aryl diazoacetates, which are challenging substrates for other chiral dirhodium
开发了一种由手性螺四磷酸二铑催化的α-芳基重氮乙酸酯的高对映选择性Si-H键插入反应。通过该方案制备了各种手性 α-甲硅烷基酯,收率高(高达 92%)和出色的对映选择性(高达 >99% ee)。值得注意的是,2-取代芳基重氮乙酸酯是其他手性二铑催化剂的挑战性底物,在该反应中也表现出良好的效果。这项工作代表了手性磷酸二铑在不对称催化中为数不多的成功应用之一。