One-Pot Catalytic Asymmetric Synthesis of Tetrahydrocarbazoles
作者:Qiong-Jie Liu、Wen-Guang Yan、Lijia Wang、X. Peter Zhang、Yong Tang
DOI:10.1021/acs.orglett.5b01909
日期:2015.8.21
A one-pot asymmetric synthesis of 1,2,3,4-tetrahydrocarbizoles has been developed via an enantioselective [3 + 3] annulation of 2-alkynylindoles and donor acceptor cyclopropanes. In the presence of chiral Lewis acids as catalysts, a series of optically active tetrahydrocarbazoles were furnished in high yields (63-87%) With good to excellent levels of enantioselectivity (up to 94% ee).