1: 3 percent / m-chloroperbenzoic acid (85percent) / CH2Cl2 / 1.) -23 deg C, 15 min; 2.) -20 deg C, 2 days 2: 100 percent / boron trifluoride etherate / CHCl3 / 0.4 h / 40 °C View Scheme

With  sodium hydroxide in  ethanol; water 18 h;  Ambient temperature;   

Multi-step reaction with 2 steps 1: 3 percent / m-chloroperbenzoic acid (85percent) / CH2Cl2 / 1.) -23 deg C, 15 min; 2.) -20 deg C, 2 days2: 100 percent / boron trifluoride etherate / CHCl3 / 0.4 h / 40 °C