Synthesis of Indolizines via Reaction of 2-Substitued Azaarenes with Enals by an Amine-NHC Relay Catalysis
作者:Hongxian Li、Xiangmin Li、Yang Yu、Jianjun Li、Yuan Liu、Hao Li、Wei Wang
DOI:10.1021/acs.orglett.7b00566
日期:2017.4.21
A metal-free catalytic strategy for the facile synthesis of biologically relevant molecular architectures indolizines and imidazopyridines has been developed. The process is promoted by amine and N-heterocyclic carbene (NHC) relay catalysis via Michael addition-[3 + 2] fusion of simple azaarenes and α,β-unsaturatedaldehydes. The preparative power is demonstrated in the synthesis of anxiolytic drug