1: Hydrazine hydrate (98percent) / Raney Ni / aq. ethanol / 1 h / Heating 2: 97 percent / 1.) aqueous NaNO2 / acetic acid; H2O / 1.) 0 deg C, 2.) 2 h, 0 deg C bis room temp. 3: 69 percent / acetone; methanol / 500 °C View Scheme