1: 88.9 percent / conc. sulfuric acid / H2O; methanol / 2 h 2: 90 percent / p-toluenesulfonyl azide, 1,5-diazabicyclo<5.4.0>undec-5-ene / ethyl acetate / 1 h / Ambient temperature 3: 82.3 percent / hydrogen / platinum oxide / acetic acid; 2-methoxy-ethanol / 4 h / 1810.02 Torr / Ambient temperature 4: 54.3 percent / conc. ammonium hydroxide / 8 h / Ambient temperature View Scheme

1: 90 percent / p-toluenesulfonyl azide, 1,5-diazabicyclo<5.4.0>undec-5-ene / ethyl acetate / 1 h / Ambient temperature 2: 82.3 percent / hydrogen / platinum oxide / acetic acid; 2-methoxy-ethanol / 4 h / 1810.02 Torr / Ambient temperature 3: 54.3 percent / conc. ammonium hydroxide / 8 h / Ambient temperature View Scheme

1: 82.3 percent / hydrogen / platinum oxide / acetic acid; 2-methoxy-ethanol / 4 h / 1810.02 Torr / Ambient temperature 2: 54.3 percent / conc. ammonium hydroxide / 8 h / Ambient temperature View Scheme

ammonium hydroxide in a pressure bottle, refrigerator, overnight;

ammonium hydroxide 8 h; Ambient temperature;

1: 78.3 percent / phosphoryl chloride / 1.5 h / Heating 2: 81.4 percent / liquid ammonia / 10 h / 100 - 110 °C / in a steel bomb 3: 59.5 percent / 10percent sodium carbonate / H2O / 1 h / Heating View Scheme

1: 78.3 percent / phosphoryl chloride / 1.5 h / Heating 2: 77 percent / 1.) hexamethyldisilazane, ammonium sulfate; 2.) stannic chloride / 1.) reflux, 15 h; 2.) 1,2-dichloroethane, 20 h, r.t. 3: 84.8 percent / liquid ammonia / methanol / 30 h / Ambient temperature; in a pressure bottle View Scheme

1: 78.3 percent / phosphoryl chloride / 1.5 h / Heating 2: 1.) hexamethyldisilazane, ammonium sulfate; 2.) stannic chloride / 1.) reflux, 15 h; 2.) 1,2-dichloroethane, 20 h, r.t. 3: 37 percent / liquid ammonia / 15 h / 100 °C / in a steel bomb View Scheme