Construction of chiral cyclopropane-fused tetrahydroquinolines: enantioselective organocatalytic Michael/alkylation domino reaction and one-pot aza-cyclization
作者:Cheolwoong Kim、Sung-Gon Kim
DOI:10.1016/j.tetasy.2014.09.003
日期:2014.10
An asymmetric two-step approach toward the synthesis of chiral cyclopropane-fused tetrahydroquinolines is described. In this synthesis, an asymmetricorganocatalytic Michael/alkylation domino reaction of dialkyl bromomalonates with o-N-protected aminophenyl α,β-unsaturated aldehydes allows the process to proceed efficiently to afford the corresponding 2-formylcyclopropane products in good yields and