3-chloro-benzenecarboperoxoic acid in dichloromethane 17 h;

1: in ethanol 0.5 h; Heating / reflux; 2: With MCPBA in dichloromethane T=20°C; 4 h; 3: With sodium hydrogencarbonate in dichloromethane; water; ethyl acetate

1: 72 percent / aq. NaOH / ethanol / Ambient temperature 2: 72 percent / MCPBA / CH2Cl2 / 17 h View Scheme

1: 60 percent / 1M aq. NaHCO3 / 24 h / Heating 2: 72 percent / aq. NaOH / ethanol / Ambient temperature 3: 72 percent / MCPBA / CH2Cl2 / 17 h View Scheme

1: 69 percent / tetrahydrofuran / 2 h / Heating 2: 60 percent / 1M aq. NaHCO3 / 24 h / Heating 3: 72 percent / aq. NaOH / ethanol / Ambient temperature 4: 72 percent / MCPBA / CH2Cl2 / 17 h View Scheme