6533b7ddfe1ef96bd127409a

RESEARCH PRODUCT

Asymmetric Synthesis of Spiro β-Lactamsviaa Squaramide- Catalyzed Sulfa-Michael Addition/Desymmetrization Protocol

Suruchi MahajanDieter EndersUğur KayaArto ValkonenKari RissanenPankaj Chauhan

subject

010405 organic chemistryChemistryStereochemistrybeta-lactamsasymmetric synthesisEnantioselective synthesisSquaramideGeneral Chemistry010402 general chemistry01 natural sciencesDesymmetrization0104 chemical sciencesKinetic resolutionStereocenterCatalysisOrganocatalysisMichael reactionta116

description

An efficient asymmetric synthesis of spirocyclohexenone β-lactams bearing three contiguous stereocenters has been achieved in moderate to good yields and high stereoselectivities. The protocol involves the combination of a squaramide-catalyzed sulfa-Michael addition under desymmetrization via a dynamic kinetic resolution of racemic 2,5-cyclohexadienones.

https://doi.org/10.1002/adsc.201600554