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Reversal of enantioselectivity in cobalt(<scp>ii</scp>)-catalyzed asymmetric Michael–alkylation reactions: synthesis of spiro-cyclopropane-oxindoles

Jun-Hao Zhang, Weijing Yang, Ning Li, Tian Yin, Ming‐Sheng Xie, Hai‐Ming Guo

2024Organic Chemistry Frontiers17 citationsDOI

Abstract

An asymmetric Michael–alkylation reaction with a reversal of enantioselectivity catalyzed by chiral cobalt complexes is reported, giving spiro-cyclopropane-oxindoles with a complete and controlled switch in stereoselectivity (up to 99% and −98% ee).

Topics & Concepts

CyclopropaneChemistryAlkylationStereoselectivityCobaltCatalysisEnantioselective synthesisMichael reactionCyclopropanationMedicinal chemistryStereochemistryOrganic chemistryRing (chemistry)Cyclopropane Reaction MechanismsAsymmetric Synthesis and CatalysisCatalytic C–H Functionalization Methods
Reversal of enantioselectivity in cobalt(<scp>ii</scp>)-catalyzed asymmetric Michael–alkylation reactions: synthesis of spiro-cyclopropane-oxindoles | Litcius