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

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