Abstract A series of four Cu (I) complexes were tested for sulfimidation of 1, 3??dithianes in the presence of [N??(p??tolysulfonyl) imino] phenyliodinane (PhI= NTs) as the nitrene??transfer agent. Cu (TMPhen)(PPh3) Br is an efficient catalyst with more than 90% yield of the corresponding product with less reaction time as compared to the literature copper (I) complexes.