1: 9percent HCl / acetic acid / 12 h / Heating 2: 72 percent / p-toluenesulfonic acid / benzene / 3 h / Heating 3: 98 percent / 30percent H2O2 / acetic acid / 1) RT, 2) reflux; m-chloroperbenzoic acid View Scheme

hydrogenchloride in acetic acid 12 h; Heating; Yield given;