Sequential Asymmetric Catalysis in Michael–Michael–Michael–Aldol Reactions: Merging Organocatalysis with Photoredox Catalysis in a One-Pot Enantioselective Synthesis of Highly Functionalized Decalines Bearing a Quaternary Carbon Stereocenter
作者:Bor-Cherng Hong、Cheng-Wei Lin、Wei-Kai Liao、Gene-Hsiang Lee
DOI:10.1021/ol403113c
日期:2013.12.20
An expedited method has been developed for the enantioselectivesynthesis of highly functionalized decaline systems containing seven contiguous stereogenic centers with high enantioselectivities (>99% ee). The one-pot methodology comprises a cascade of organocatalytic double Michael–photocatalyzed Michael–aldol reactions of ethyl 2-bromo-6-formylhex-2-enoate, β-alkyl-α,β-unsaturated aldehydes, and