Synthesis of benzosultams <i>via</i> Ag(<scp>i</scp>)-catalyzed alkylative cyclization of vinyl sulfonamides

A convenient method to access benzo-fused-γ-sultams <i>via</i> 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.