lithium azide in N,N-dimethyl-formamide T=80°C; 24 h;

acetic acid 3 h; Ambient temperature;

1: 76 percent / pyridine / 48 h / Ambient temperature 2: pyridine / 4 °C 3: 80percent AcOH / 4.5 h 4: 93 percent / LiN3 / dimethylformamide / 24 h / 80 °C View Scheme

1: pyridine / 4 °C 2: 80percent AcOH / 4.5 h 3: 93 percent / LiN3 / dimethylformamide / 24 h / 80 °C View Scheme

1: 75 percent / pyridine / 20 h / Ambient temperature 2: 81 percent / pyridine / 1 h / Ambient temperature 3: 87 percent / KOH-NaBH4 / benzene; methanol / 24 h / Ambient temperature 4: 93 percent / pyridine / 5 h / Ambient temperature 5: 78 percent / NaN3 / dimethylformamide / 5 h / 105 - 110 °C 6: 75 percent / 80percent AcOH / 4 h / Ambient temperature View Scheme

1: 74 percent / pyridine / dimethylformamide / 7 h / Ambient temperature 2: 94 percent / pyridine / 2.5 h / Ambient temperature 3: 96 percent / KOH-NaBH4 / benzene; methanol / 24 h / Ambient temperature 4: 93 percent / pyridine / 5 h / Ambient temperature 5: 78 percent / NaN3 / dimethylformamide / 5 h / 105 - 110 °C 6: 75 percent / 80percent AcOH / 4 h / Ambient temperature View Scheme