in dichloromethane T=0°C;

oxygen; rose bengal; sodium sulfite 1.) methanol, irradiation, 7 h, 2.) methanol, 15 h; Yield given. Multistep reaction. Yields of byproduct given;

3-chloro-benzenecarboperoxoic acid in dichloromethane 3 h;

1: 1.) O2, rose bengal, 2.) 15 percent aq. Na2SO3 / 1.) methanol, irradiation, 7 h, 2.) methanol, 15 h 2: 68 percent / manganese dioxide / petroleum ether / 3 h View Scheme

1: 340 mg / CH2Cl2 / 0.17 h / 0 °C 2: 94 percent / AcOH / 1 h / 20 °C 3: 350 mg / 30percent H2O2, AcOH / 20 h / 20 °C 4: 218 mg / NaHCO3 / toluene / 1.5 h / Heating 5: 85 percent / AcOH, toluene-p-sulphonic acid / diethyl ether; H2O / 1 h / 0 °C 6: 83 percent / 10percent KOH / ethanol; H2O / 3 h / 20 °C 7: 88 percent / MnO2 / CH2Cl2 / 15 h / 20 °C View Scheme

1: 1.) O2, rose bengal, 2.) 15 percent aq. Na2SO3 / 1.) methanol, irradiation, 7 h, 2.) methanol, 15 h 2: 68 percent / manganese dioxide / petroleum ether / 3 h 3: 1.3 g / H2 / 10 percent Pd/C / ethanol / 0.58 h View Scheme

1: 340 mg / CH2Cl2 / 0.17 h / 0 °C 2: Et3N / dimethylformamide / 20 h / 60 °C 3: 314 mg / 30percent H2O2, AcOH / 20 h / 20 °C 4: trimethyl phosphite, MeOH / 48 h / 20 °C View Scheme