1: 1.) hydrogen, 2.) NaBH4 / 1.) 50percent aq. EtOH, Adams catalyst (PtO2*H2O), 1 atm, room temp., 18 h 2: 98 percent / HCL aq. / 2 h / 40 °C 3: 82 percent / Hg(OAc)2, EDTA 4: 89 percent / HClO4, H2 / Pd / ethanol / 6 h / 760 Torr / Ambient temperature View Scheme

1: 1.) hydrogen, 2.) NaBH4 / 1.) 50percent aq. EtOH, Adams catalyst (PtO2*H2O), 1 atm, room temp., 18 h 2: 98 percent / HCL aq. / 2 h / 40 °C 3: 82 percent / Hg(OAc)2, EDTA 4: 89 percent / HClO4, H2 / Pd / ethanol / 6 h / 760 Torr / Ambient temperature 5: 1.) NH2NH2, 2.) KOH View Scheme