1: 91 percent / H2 / Pd/C / ethanol / 6 h / 1292.87 Torr 2: 52 percent / pyridine / 1-methyl-pyrrolidin-2-one / 5 h / 140 °C 3: 90 percent / conc. HCl / 5 h / 20 °C 4: 82 percent / NH4F / methanol / Heating View Scheme

1: 91 percent / H2 / Pd/C / ethanol / 6 h / 1292.87 Torr 2: 52 percent / pyridine / 1-methyl-pyrrolidin-2-one / 5 h / 140 °C 3: 90 percent / conc. HCl / 5 h / 20 °C 4: 82 percent / NH4F / methanol / Heating 5: NH3 / methanol View Scheme