A palladium-catalyzed, iodine-mediatedelectrophilicannulation between 2-(1-alkynyl)biphenyl and disulfide has been developed. With the combination of PdCl2 and I2, a variety of 2-(1-alkynyl)biphenyls underwent electrophilicannulations with various disulfides successfully to afford the corresponding 9-sulfenyl phenanthrenes in moderate to excellent yields.