1: 80 percent / m-chloroperbenzoic acid / CH2Cl2 / 1 h / 20 °C 2: 85 percent / n-Bu4NF / tetrahydrofuran / 2 h / 0 °C View Scheme

3-chloro-benzenecarboperoxoic acid in dichloromethane T=20°C; 1 h;