1: 74 percent / K2CO3 / ethanol / 7 h / Heating 2: 95 percent / pyridine 3: 83 percent / NaBH4 / methanol / 0.5 h / 20 °C 4: 92 percent / HCl / methanol; H2O / 1 h / 20 °C 5: 95 percent / KOH / H2O; methanol / 10 h / 40 °C 6: 90 percent / H2 / Pd/C / ethanol / 7 h / 20 °C View Scheme