Depropargylation under palladium–copper catalysis: synthesis of diaryl sulfides

3-[2-(N-p-Toluenesulfonyl)aminophenylthio]prop-1-yne, reacted with aryl iodides in the presence of Et3N in THF solution with (PPh3)2PdCl2 (3 mol%) and CuI (40 mol%) at room temperature for 8 h followed by reflux for 20 h to yield diaryl sulfides by a depropargylation and S-arylation reaction.