CAN mediated reaction of aryl sulfinates with alkenes and alkynes:: Synthesis of vinyl sulfones, β-iodovinyl sulfones and acetylenic sulfones

Cerium(IV) ammonium nitrate (CAN) mediated reaction of aryl sulfinates and sodium iodide with alkenes afforded vinyl sulfones in very good yields. Alkynes underwent similar reaction to give beta-iodovinyl sulfones, which on treatment with potassium carbonate afforded the corresponding acetylenic sulfones in high yields.