1: 99 percent / H2O2 / acetic acid; H2O; tetrahydrofuran / 1.5 h 2: 79.5 percent / carbonate de potassium / acetone / 3 h / Heating 3: PCl5 / benzene / 0.75 h / 70 °C 4: SnCl2, HCl / diethyl ether; various solvent(s) / 60 h / Ambient temperature 5: 20percent H2SO4, acetic acid / 0.67 h / Heating 6: 90 percent / AlCl3 / CH2Cl2 / 2.33 h / Ambient temperature 7: 11 percent / potassium carbonate / dimethylformamide / 1.25 h / Heating View Scheme

1: 99 percent / H2O2 / acetic acid; H2O; tetrahydrofuran / 1.5 h 2: 79.5 percent / carbonate de potassium / acetone / 3 h / Heating 3: PCl5 / benzene / 0.75 h / 70 °C 4: SnCl2, HCl / diethyl ether; various solvent(s) / 60 h / Ambient temperature 5: 20percent H2SO4, acetic acid / 0.67 h / Heating 6: 90 percent / AlCl3 / CH2Cl2 / 2.33 h / Ambient temperature 7: 71 percent / fluorure de potassium / methanol / 40 h View Scheme