Copper-Catalyzed Substitution of α-Triflyloxy Nitriles and Esters with Silicon Nucleophiles under Inversion of the Configuration
作者:Jonas Scharfbier、Hamideh Hazrati、Elisabeth Irran、Martin Oestreich
DOI:10.1021/acs.orglett.7b03279
日期:2017.12.15
A copper-catalyzed nucleophilic displacement of α-triflyloxy nitriles and esters with silicon nucleophiles allows for the stereospecific generation of highly enantioenriched α-silylated carboxyl compounds. The enantioselective synthesis of α-silylated nitriles is unprecedented. The catalytic system exhibits good functional group tolerance. The stereochemical course of the substitution is shown to proceed
铜催化的α-三氟乙腈和酯与硅亲核试剂的亲核取代反应可以立体定向生成高度对映体富集的α-甲硅烷基化的羧基化合物。α-甲硅烷基化腈的对映选择性合成是前所未有的。催化体系表现出良好的官能团耐受性。取代的立体化学过程显示为反转构型。新的反应是对催化C(sp 3)-Si交叉偶联方法数量仍然有限的补充。