Synergistic Catalysis for Asymmetric [3 + 2] Cycloadditions of 2-Indolylmethanols with <i>α,β</i>-Unsaturated Aldehydes
作者:Jia Mao、Hao Zhang、Xiang-Feng Ding、Xiaoyan Luo、Wei-Ping Deng
DOI:10.1021/acs.joc.9b01234
日期:2019.9.6
A catalytic asymmetric [3 + 2] cycloaddition of 2-indolylmethanols with α,β-unsaturated aldehydes was developed for the first time. This transformation was achieved by a synergistic catalytic system consisting of a palladium complex, a Brønsted acid, and a chiral secondary amine to synthesize biologically active cyclopenta[b]indole derivatives with excellent diastereo- and enantioselectivities (up
首次开发了2-吲哚基甲醇与α,β-不饱和醛的催化不对称[3 + 2]环加成反应。这种转化是通过由钯配合物,布朗斯台德酸和手性仲胺组成的协同催化体系完成的,以合成具有非对映选择性和对映选择性的生物活性环戊[ b ]吲哚衍生物(高达> 20:1 dr,到99%ee)。