1: in benzene T=20°C; 96 h; Irradiation; 2: With sodium sulfate; silver(l) oxide in tetrahydrofuran 2 h;

silver carbonate in dichloromethane 0.0833333 h; Ambient temperature;

1: 55 percent / aq. hydrogen peroxide, trifluoroacetic acid / CHCl3 / 6 h / 0 °C 2: 98 percent / silver carbonate on Celite / CH2Cl2 / 0.08 h / Ambient temperature View Scheme

1: 70 percent / sodium hydride / tetrahydrofuran / 5 h / Heating 2: 55 percent / aq. hydrogen peroxide, trifluoroacetic acid / CHCl3 / 6 h / 0 °C 3: 98 percent / silver carbonate on Celite / CH2Cl2 / 0.08 h / Ambient temperature View Scheme