1: 91 percent / m-chloroperbenzoic acid / CH2Cl2 / 1 h / Ambient temperature 2: 84 percent / p-toluenesulfonic acid / benzene / 0.5 h / Heating 3: 97 percent / Zn / acetic acid / 4 h / Heating 4: 85 percent / 20percent NaOH / ethanol / 3 h / Heating View Scheme

1: 91 percent / m-chloroperbenzoic acid / CH2Cl2 / 1 h / Ambient temperature 2: 84 percent / p-toluenesulfonic acid / benzene / 0.5 h / Heating 3: 91 percent / 2N NaOH / ethanol / 48 h / Heating 4: 85 percent / Raney nickel / ethanol / Heating View Scheme

1: 91 percent / m-chloroperbenzoic acid / CH2Cl2 / 1 h / Ambient temperature 2: 84 percent / p-toluenesulfonic acid / benzene / 0.5 h / Heating 3: 97 percent / Zn / acetic acid / 4 h / Heating View Scheme

in benzene 6 h; Heating; Yield given;