1: 67 percent / 5M HCl / ethanol / 3 h / Heating 2: 1.) NaNO2, 10M HCl, 2.) NaN3 / 1.) H2O, 0 deg C, 30 min, 2.) H2O, 10 min 3: 75 percent / NH2NH2*H2O, CH3COOH / ethanol / 15 h / Heating View Scheme

ammonium acetate; ammonia T=165°C;