acetic acid; sodium nitrite Ambient temperature;

1: 95 percent / hydrazine hydrate / ethanol / 5 h / Heating 2: 83 percent / CH3COOH, NaNO2 / Ambient temperature View Scheme

1: 60 percent / N,N-dimethylaniline, POCl3 / benzene / 2 h / Heating 2: 10 percent / hydrazine hydrate / benzene / 2 h 3: 96 percent / 2.9 N aq. HCl, NaNO2 / H2O 4: 40 percent / 0.03 h / Heating View Scheme

0.0333333 h; Heating;