1: 98 percent / Fe / ethanol; H2O; acetic acid / 2 h / Heating 2: 65.2 g / CHCl3 / 7 h / Heating 3: 1. N2H4; 2. aq. NH3 / 1. methanol, H2O, 60 to 65 deg C, 3 h; 2. water, room temperature, 1 h 4: 75 percent / P2S5 / pyridine / 0.75 h / Heating 5: 89 percent / pyridine; butan-1-ol / 6 h / Heating View Scheme

1: 98 percent / Fe / ethanol; H2O; acetic acid / 2 h / Heating 2: 65.2 g / CHCl3 / 7 h / Heating 3: 1. N2H4; 2. aq. NH3 / 1. methanol, H2O, 60 to 65 deg C, 3 h; 2. water, room temperature, 1 h 4: 75 percent / P2S5 / pyridine / 0.75 h / Heating 5: 63 percent / pyridine; butan-1-ol / 6 h / Heating View Scheme