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N-heterocyclic carbene-catalyzed homoenolate additions with N-aryl ketimines as electrophiles: efficient synthesis of spirocyclic γ-lactam oxindoles. | LitMetric
In pole position: A simple and efficient approach to spirocyclic γ-lactam oxindoles by the N-heterocyclic carbene catalyzed addition of homoenloate equivalents to N-aryl isatinimines has been developed (see scheme). The use of N-aryl isatinimines as electrophiles in the NHC-catalyzed umpolung reaction of α,β-unsaturated aldehydes is demonstrated for the first time.
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