1: 96 percent / H2 / Ra-Ni / ethyl acetate / 6 h / 2327.2 Torr 3: NaNO2, 2 N aq. HCl / H2O / 1 h / 0 °C 4: LiAlH4 / tetrahydrofuran / 1 h / Heating 5: 1.) pyridinium 3-nitrobenzenesulfonic acid, 2.) AcOH / 1.) H2O, reflux, 3 h, 2.) reflux, 1 h View Scheme