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A convenient method to access benzo-fused-γ-sultams via alkyl radical induced cyclization of vinyl sulfonamides is presented. A wide range of carboxylic acids including sterically hindered adamantanes participated as alkyl donors in this Ag(I)-catalyzed decarboxylative alkylation. The reaction utilizes readily available starting materials and demonstrates a broad substrate scope.

Graphical abstract: Synthesis of benzosultams via Ag(i)-catalyzed alkylative cyclization of vinyl sulfonamides

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