Cp*Co(iii)-catalyzed C–H amination/annulation cascade of sulfoxonium ylides with anthranils for the synthesis of indoloindolones

Abstract

Cp*Co(III)-catalyzed [4+1] annulation of sulfoxonium ylides with anthranils has been developed for the synthesis of indole–indolone scaffolds. The dual functionality of anthranils was exploited, wherein the nitrogen has been used for C–H amination and the aldehyde group was utilized in the subsequent intramolecular aldol condensation to furnish the corresponding annulated products.