1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C 3: 70 percent / 80percent acetic acid / 0.33 h / Heating 4: 86 percent / H2 / 10percent Pd/C / ethanol / 2 h / 2585.7 Torr View Scheme

1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C 3: 70 percent / 80percent acetic acid / 0.33 h / Heating 4: pyridine / 24 h / 4 °C 5: thionyl chloride / CHCl3; dimethylformamide / 6 h / Heating 6: 31 percent / NH3 / methanol / 144 h / Ambient temperature 7: 65 percent / H2 / 10percent Pd/C / methanol / 2 h / 2585.7 Torr View Scheme

1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C View Scheme

1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C 3: 70 percent / 80percent acetic acid / 0.33 h / Heating 4: pyridine / 24 h / 4 °C View Scheme

1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C 3: 70 percent / 80percent acetic acid / 0.33 h / Heating 4: pyridine / 24 h / 4 °C 5: thionyl chloride / CHCl3; dimethylformamide / 6 h / Heating 6: 31 percent / NH3 / methanol / 144 h / Ambient temperature View Scheme

1: 91 percent / pyridine / 24 h / Ambient temperature 2: 86 percent / LiN3 / dimethylformamide / 2 h / 85 °C 3: 70 percent / 80percent acetic acid / 0.33 h / Heating View Scheme

pyridine 24 h; Ambient temperature;