1.1: sodium azide / N,N-dimethyl-formamide / 50 - 55 °C 2.1: hydrogen / 5 palladium on charcoal / ethyl acetate / 1 h / 25 - 30 °C / 2795.17 Torr / Autoclave 3.1: ethyl acetate / 1 h / 25 - 30 °C 3.2: 1 h / 25 - 30 °C 4.1: sodium hydroxide; water / tetrabutylammomium bromide / dichloromethane / -10 - -5 °C 4.2: 2 h / 25 - 30 °C View Scheme

1.1: sodium azide / N,N-dimethyl-formamide / 50 - 55 °C 2.1: hydrogen / 5 palladium on charcoal / ethyl acetate / 1 h / 25 - 30 °C / 2795.17 Torr / Autoclave 3.1: ethyl acetate / 1 h / 25 - 30 °C 3.2: 1 h / 25 - 30 °C View Scheme