1: 72 percent / HNO3, H2SO4, SO3 / 1 h / Heating 2: 87 percent / PCl5, POCl3 / 6 h / 130 - 140 °C 3: 12.5 g / ethanol / 5 h / Heating 4: H2, TFA / 5percent Pd/C / aq. ethanol / 2327.2 Torr 5: HCl / ethanol / 1.) 25 deg C, 5 h, 2.) reflux, 1.5 h 6: MnO2, 5 M NaOH / H2O / 0.83 h / pH 6 View Scheme

1: 87 percent / PCl5, POCl3 / 6 h / 130 - 140 °C 2: 12.5 g / ethanol / 5 h / Heating 3: H2, TFA / 5percent Pd/C / aq. ethanol / 2327.2 Torr 4: HCl / ethanol / 1.) 25 deg C, 5 h, 2.) reflux, 1.5 h 5: MnO2, 5 M NaOH / H2O / 0.83 h / pH 6 View Scheme

1: 12.5 g / ethanol / 5 h / Heating 2: H2, TFA / 5percent Pd/C / aq. ethanol / 2327.2 Torr 3: HCl / ethanol / 1.) 25 deg C, 5 h, 2.) reflux, 1.5 h 4: MnO2, 5 M NaOH / H2O / 0.83 h / pH 6 View Scheme

1: H2, TFA / 5percent Pd/C / aq. ethanol / 2327.2 Torr 2: HCl / ethanol / 1.) 25 deg C, 5 h, 2.) reflux, 1.5 h 3: MnO2, 5 M NaOH / H2O / 0.83 h / pH 6 View Scheme