1.1: 75 percent / H2 / palladium on charcoal / ethanol / 24 h / 20 °C / 3102.89 Torr 2.1: sodium nitrite / acetic acid; H2O / 0.25 h / 0 °C 2.2: 80 percent / sodium azide / acetic acid; H2O / 0 °C 3.1: 15 percent / 10 h / Heating View Scheme