1: 85 percent / CF3COOH, H2O / CH2Cl2 / 24 h / Ambient temperature 2: 95 percent / SOCl2, Et3N / CH2Cl2 / 1 h / 0 °C 3: 90 percent / LiN3 / dimethylformamide / 3 h / 80 °C 4: 95 percent / pyridine / CH2Cl2 / 3 h / 0 °C 5: 27 percent / dimethylformamide / 80 °C 6: 100 percent / K2CO3 / methanol / 12 h / Ambient temperature 7: 97 percent / PPh3 / pyridine; aq. NH3 / Ambient temperature 8: Na / tetrahydrofuran; liquid ammonia / 4 h / -78 °C View Scheme