[C:1](OO)(=O)[CH3:2].[C:6]([O:14][CH:15]([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)C(=O)C1C=CC=CC=1)(=[O:13])[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[C:30]([O-:33])([O-])=[O:31].[Na+].[Na+]>ClCCl>[C:30]([O:33][CH:15]([O:14][C:6](=[O:13])[C:7]1[CH:8]=[CH:9][CH:10]=[CH:11][CH:12]=1)[C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1)(=[O:31])[C:2]1[CH:1]=[CH:9][CH:8]=[CH:7][CH:6]=132% peracetic acid (0.67 mL, 3.79 mmol) was added to a suspension of desyl benzoate (300 mg, 0.95 mmol) and Na2CO3 (402 mg, 3.79 mmol) in dichloromethane (5 mL) at 0° C. The reaction mixture was stirred overnight at room temperature, diluted with dichloromethane, washed with saturated NaHCO3 and brine and dried over Na2SO4. Concentration in vacuo provided 250 mg the title compound (79%). 1H NMR (CDCl3): δ 8.22 (1H, s); 7.73-7.71 (2H, m); 7.59-7.55 (2H, m); 7.48-7.42 (7H, m).
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