1: 85 percent / hydrogen chloride (g) / CH2Cl2 / 45 h / Ambient temperature 2: 35 percent / 1.) 30percent aq. potassium hydroxide, 30percent hydrogen peroxide; 2.) potassium hydroxide / 1.) methanol, 60 deg C, 6 h; 2.) 1,2-ethanediol, reflux, 18 h 3: 24 percent / potassium carbonate / dimethylformamide / 18 h / 20 °C 4: 0.67 h / 900 °C / 0.05 Torr View Scheme