in N,N-dimethyl-formamide 2.5 h; Heating;

1: 49 percent / phosphorus oxidochloride / Ambient temperature; 1.) 20 deg C, 1 h, 2.) 50 deg C, 40 h, 2: 64 percent / sodium ethoxide / 1 h / 10 °C 3: 96 percent / toluene / 0.33 h / Heating 4: 79 percent / hydrazin hydrate 80percent / methanol / 40 h / Heating 5: 94 percent / dimethylformamide / 2.5 h / Heating View Scheme

1: 64 percent / sodium ethoxide / 1 h / 10 °C 2: 96 percent / toluene / 0.33 h / Heating 3: 79 percent / hydrazin hydrate 80percent / methanol / 40 h / Heating 4: 94 percent / dimethylformamide / 2.5 h / Heating View Scheme

1: 96 percent / toluene / 0.33 h / Heating 2: 79 percent / hydrazin hydrate 80percent / methanol / 40 h / Heating 3: 94 percent / dimethylformamide / 2.5 h / Heating View Scheme

1: 79 percent / hydrazin hydrate 80percent / methanol / 40 h / Heating 2: 94 percent / dimethylformamide / 2.5 h / Heating View Scheme