Asymmetric organocatalytic Michael addition/aza-cyclization coupled with sequential Michael addition for synthesizing densely polycyclic-fused dihydroquinolines
作者:Mirim Yu、Sung-Gon Kim
DOI:10.1016/j.tetlet.2015.04.112
日期:2015.7
A highly efficient sequential process based on organocatalysis for the asymmetricsynthesis of polycyclic-fused dihydroquinolines is described. In this synthesis, an asymmetricorganocatalytic Michael/aza-cyclization dominoreaction of 5-formylpent-2-enyl esters with N-protected-2-amino-β-nitrostyrenes, followed by dehydration, affords the corresponding α,β-unsaturated ester containing 1,4-dihydroquinoline