1: 2.2 g / 1M methanolic ammonia / 6 h / Ambient temperature 2: 68 percent / sodium azide, ammonium chloride / dimethylformamide / 1.2 h / Heating 3: 1.) 1.4 M methanolic hydrochloric acid / 1.) reflux, 1.5 h; 2.) pyridine, roomtemp., overnight 4: 82 percent / barium hydroxide octahydrate / methanol / 0.17 h / Ambient temperature 5: 79 percent / H2 / Pd-black / H2O / 1 h View Scheme

Multi-step reaction with 3 steps 1: 2.2 g / 1M methanolic ammonia / 6 h / Ambient temperature2: 68 percent / sodium azide, ammonium chloride / dimethylformamide / 1.2 h / Heating3: 1.) 1.4 M methanolic hydrochloric acid / 1.) reflux, 1.5 h; 2.) pyridine, roomtemp., overnight  

Multi-step reaction with 4 steps 1: 2.2 g / 1M methanolic ammonia / 6 h / Ambient temperature2: 68 percent / sodium azide, ammonium chloride / dimethylformamide / 1.2 h / Heating3: 1.) 1.4 M methanolic hydrochloric acid / 1.) reflux, 1.5 h; 2.) pyridine, roomtemp., overnight4: 82 percent / barium hydroxide octahydrate / methanol / 0.17 h / Ambient temperature  

 in  pyridine 3 h;  Ambient temperature;   

Multi-step reaction with 2 steps 1: 93 percent / pyridine / -40 °C2: 94 percent / pyridine / 3 h / Ambient temperature