Catalytic ortho C–H methylation and trideuteromethylation of arylthianthrenium salts via the Catellani strategy

We report a Pd/NBE cooperative catalyzed ortho C–H methylation and trideuteromethylation of arylthianthrenium salts, enabling the efficient synthesis of a wide variety of (trideutero)methylated arenes in moderate to good yields.