in ethanol 6 h; Heating;

in methanol Heating;

in N,N-dimethyl-formamide 19 h; Heating;

1: 76 percent / hydrazine hydrate / ethanol / 2 h / Heating 2: sodium hydroxide / dimethylsulfoxide / 1 h / 20 °C 3: dimethylsulfoxide / 2 h / 5 - 10 °C 4: 72 percent / dimethylformamide / 19 h / Heating View Scheme

1: sodium hydroxide / dimethylsulfoxide / 1 h / 20 °C 2: dimethylsulfoxide / 2 h / 5 - 10 °C 3: 72 percent / dimethylformamide / 19 h / Heating View Scheme

1: 73 percent / 1 h / Heating 2: 76 percent / hydrazine hydrate / ethanol / 2 h / Heating 3: sodium hydroxide / dimethylsulfoxide / 1 h / 20 °C 4: dimethylsulfoxide / 2 h / 5 - 10 °C 5: 72 percent / dimethylformamide / 19 h / Heating View Scheme