1: 60 percent / 5 N aq. HCl, aq. NaNO2 / 1.) 0 deg C, 2.) reflux, 2.5 h 2: N2H4*H2O, N2H4*HCl / ethanol / Heating 3: sodium sulfate, MnO2/SiO2, KOH / ethanol / 10 h / Ambient temperature 4: 2.2 percent Chromat. / cyclohexane / Ambient temperature; Irradiation View Scheme

hydrogenchloride; sodium nitrite 1.) 0 deg C, 2.) reflux, 2.5 h;

hydrogenchloride Diazotization;