1: 53 percent / HCOONH4 / Pd/C / methanol / 5 h / Heating 2: 70 percent / aq. HCl / 1.5 h / 50 - 55 °C View Scheme

1: 53 percent / HCOONH4 / Pd/C / methanol / 5 h / Heating 2: 70 percent / aq. HCl / 1.5 h / 50 - 55 °C 3: 95 percent / K2CO3 / dimethylformamide / 20 °C View Scheme

ammonium formate; palladium on activated charcoal in methanol 5 h; Heating;