1: 82 percent / Hg(OAc)2, EDTA 2: 89 percent / HClO4, H2 / Pd / ethanol / 6 h / 760 Torr / Ambient temperature View Scheme

1: 82 percent / Hg(OAc)2, EDTA 2: 89 percent / HClO4, H2 / Pd / ethanol / 6 h / 760 Torr / Ambient temperature 3: 1.) NH2NH2, 2.) KOH View Scheme