phosphorus trichoride in toluene Condensation; 3 h; Heating;

1: 75 percent / dioxane / 24 h 2: 80 percent / PCl3 / toluene / 3 h / Heating View Scheme

1: NaN3 / dimethylformamide 2: 78 percent / 2 h / 80 °C 3: 2.) H2O / acetic acid / Heating; 1.) 5 min, 2.) 5 min 4: 65 percent / Na2CO3 / dioxane / 24 h / Ambient temperature View Scheme