in butan-1-ol 7 h; Heating;

1: 90 percent / 18 percent aq. N2H4 / methanol / 1.) 60 deg C, 3 h, 2.) R.T. 30 min. 2: 60 percent / P2S5 / pyridine / 0.75 h / Heating 3: 89 percent / butan-1-ol / 7 h / Heating View Scheme

1: 97 percent / CHCl3 / 5 h / Heating 2: 90 percent / 18 percent aq. N2H4 / methanol / 1.) 60 deg C, 3 h, 2.) R.T. 30 min. 3: 60 percent / P2S5 / pyridine / 0.75 h / Heating 4: 89 percent / butan-1-ol / 7 h / Heating View Scheme

1: 60 percent / P2S5 / pyridine / 0.75 h / Heating 2: 89 percent / butan-1-ol / 7 h / Heating View Scheme