Method A: 3 equiv of TBA-OX, CH2C12, room temperature; Chromatography.* Method B: 3 equiv of TBA-OX, 3 equiv of Na2C03, CHZC12, room temperature; H20, ether; chromatography. eStarting sulfide, EZ 3: l; sulfone, all E. Starting sulfide, EZ 4: l; sulfone, EZ 9: l.