Synthesis of α-iodo β-ketosulfones and α-iodo methylsulfones using iodine monochloride

The synthesis of α-iodo β-ketosulfones and α-iodo methylsulfones is described. Reaction of β-ketosulfones with iodine monochloride in acetic acid at room temperature gave the corresponding α-iodo β-ketosulfones, which, on treatment with aqueous alkali, underwent base-induced cleavage to afford α-iodo methylsulfones.