Palladium-catalyzed annulation of N-alkoxy benzsulfonamides with arynes by C–H functionalization: access to dibenzosultams†
Abstract
Palladium-catalyzed C–H/N–H functionalization of easily prepared N-alkoxy benzsulfonamides with arynes provides dibenzosultams in good yields via C–C/C–N bond formation, accompanied by an unexpected N–O bond cleavage. A mechanistic study shows that the reaction proceeds through a rate-determining C–H bond cleavage.