1: 67 percent / 1.) potassium hydroxide / H2O / 1.) 115 deg C, 1h; 2.) 120 deg C, 1h 2: 48 percent / phosphorous tribromide / pyridine / 0 - 50 °C 3: 72 percent / 1.) potassium hydroxide / H2O / 1.) 115 deg C, 1h; 2.) 120 deg C, 1h View Scheme

potassium hydroxide in water 1.) 115 deg C, 1h; 2.) 120 deg C, 1h;