Photoinduced carbene transfer for copper-catalyzed asymmetric [4 + 1] cycloadditions: an entry to chiral indolines bearing quaternary stereocenters
Bao‐Le Qu, Bin Shi, Lin He, Junwei Shi, Wen‐Jing Xiao, Liang‐Qiu Lu
Abstract
A copper-catalyzed asymmetric [4 + 1] cycloaddition of ethynylbenzoxazinones with sulfur ylides formed in situ by photoinduced carbene transfer is reported to afford chiral indolines with good efficiency, enantio- and diastereoselectivities.
Topics & Concepts
StereocenterChemistryCarbeneCopperCatalysisCycloadditionEnantioselective synthesisPhotochemistryOrganocatalysisOrganic chemistryCyclopropane Reaction MechanismsCatalytic C–H Functionalization MethodsSynthesis and Catalytic Reactions