Switchable Access to Different Spirocyclopentane Oxindoles by N‐Heterocyclic Carbene Catalyzed Reactions of Isatin‐Derived Enals and N‐Sulfonyl Ketimines

Angewchem
Switchable Access to Different Spirocyclopentane Oxindoles by N‐Heterocyclic Carbene Catalyzed Reactions of Isatin‐Derived Enals and N‐Sulfonyl Ketimines: A novel NHC‐catalyzed annulation protocol for the asymmetric synthesis of biologically important β‐lactam fused spirocyclopentane oxindoles with four contiguous stereocenters, including two quaternary...

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