Microwave-Assisted Copper Slag-Catalyzed Green S-Arylation of Arenethiols with Arylboronic Acids

Diaryl sulfides have been synthesized in moderate to excellent yield by S -arylation of arenethiols with arylboronic acids using copper slag as a catalyst. Copper slag is a by-product obtained from smelting and refining of copper. Conventional heating method has been compared with the microwave-assisted technique. The proposed microwave-assisted synthesis provides excellent yields of diaryl sulfides in a short time (10 min) and is ligand-free, green, and cost-effective.