1.1: H2 / 2 percent Pd/C / methanol / 8 h / 40 - 45 °C 2.1: 0.2 g / methanol / 3 h / Heating 3.1: 99 percent / aq. HCl / 0.25 h / Heating 4.1: KOH / dimethylsulfoxide / 0.08 h 4.2: 70 percent / dimethylsulfoxide / 2 h / 20 °C View Scheme

1: H2 / 2 percent Pd/C / methanol / 8 h / 40 - 45 °C 2: 0.2 g / methanol / 3 h / Heating 3: 99 percent / aq. HCl / 0.25 h / Heating View Scheme

1: H2 / 2 percent Pd/C / methanol / 8 h / 40 - 45 °C 2: 33 percent / CHCl3 / 720 h / 20 °C View Scheme

hydrogen; palladium on activated charcoal in methanol T=40 - 45°C; 8 h;