1: 95 percent / NaN3 / dimethylformamide / 75 °C 2: 95 percent / 1.) NaOH (2M); 2.) conc.HCl / Ambient temperature 3: 80 percent / 1.) H2; 2.) HCl gas / 1.) Pd-C / diethyl ether; ethanol / 760 Torr / Ambient temperature View Scheme