[C:1]1([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][C:4]([S:7][CH2:8][C:9](=[O:11])[CH3:10])=[CH:3][CH:2]=1.C(=O)(O)[O-:19].[Na+].OOS([O-])=O.[K+].[OH2:29]>CO>[C:1]1([C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=2)[CH:6]=[CH:5][C:4]([S:7]([CH2:8][C:9](=[O:11])[CH3:10])(=[O:19])=[O:29])=[CH:3][CH:2]=11-(1,1′-biphenyl-4-ylthio)propan-2-one (69 mg, 0.28 mmol) was stirred at room temperature with sodium bicarbonate (72 mg, 0.85 mmol), oxone ((525 mg, 0.85 mmol), water (5 ml) and methanol (10 ml) for 3 hours. Water (50 ml) was added and the product extracted into ethyl. acetate (3×25 ml). The extracts were brine washed, sodium sulphate dried and evaporated to give 78 mg (99%) product that was of sufficient purity to use with out further purification.
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