1.1: 94 percent / H2 / Pd/C / ethyl acetate / 20 °C / 2280.15 Torr 2.1: aq. NaNO2; H2SO4 / acetic acid / 0.33 h / 0 °C 2.2: 10 percent / urea; H2O; H2SO4 / 0.17 h / Heating View Scheme

hydrogen; palladium on activated charcoal in ethyl acetate T=20°C; Catalytic hydrogenation; P=2280.15 Torr;