Ligand‐Free Palladium(II)‐Catalyzed ortho‐C–H Chalcogenations of N‐Arylsulfonamide via Weak Coordination

The first palladium(II)‐catalyzed direct ortho‐C(sp2)–H chalcogenations of N‐arylsulfonamide via weak coordination have been achieved, affording the corresponding mono‐chalocgenated products in good to excellent yields. This strategy features ligand/additive‐free conditions, broad substrate scope with excellent functional group tolerance and a high position selectivity. The first palladium(II)‐catalyzed direct ortho‐C(sp2)–H chalcogenations of N‐arylsulfonamide via weak coordination have been achieved. This strategy features ligand/additive‐free conditions, broad substrate scope with excellent functional group tolerance and a high position selectivity.