Enantioselective Synthesis of 2,2,3-Trisubstituted Indolines via Bimetallic Relay Catalysis of α-Diazoketones with Enones
作者:Jian Yang、Chaoqi Ke、Dong Zhang、Xiaohua Liu、Xiaoming Feng
DOI:10.1021/acs.orglett.8b01744
日期:2018.8.3
An efficient asymmetric intramolecular trapping of ammonium ylides of α-diazoketones with enones to synthesize indoline derivatives was realized. A Rh(II)/chiral N,N′-dioxide−Sc(III) complex bimetallic relay catalytic system was established. A series of optically active 2,2,3-trisubstituted indolines were obtained in high yields (up to 99%), good enantioselectivities (up to 99% ee), and excellent
实现了一种高效的不对称分子内捕获α-重氮酮的酰化铵与烯酮合成二氢吲哚衍生物的方法。建立了Rh(II)/手性N,N'-二氧化物-Sc(III)复合双金属中继催化体系。在温和的反应条件下,以高收率(高达99%),良好的对映选择性(高达99%ee)和出色的非对映选择性(高达> 19:1 dr)获得了一系列旋光的2,2,3-三取代的二氢吲哚。条件。