1: H2, 0.5 M KOH / 5percent Pd/C / H2O / 760 Torr / Ambient temperature 2: 2.) K3Fe(CN)6, KI, O2, HCOOH / 1.) methanol, a.) 25 deg C, 90 min., b.) reflux, 30 min., 2.) methanol, water, 25 deg C, 20 h View Scheme

sodium thiosulfate in water; acetic acid T=80°C; 0.75 h;