1: 78 percent / NaH / tetrahydrofuran / 9 h / 60 °C 2: 89 percent / NH3 / methanol / 6 h / 120 °C / 33752.7 Torr 3: 92 percent / H2, MgO / 5percent Pd/C / methanol / 65 h / 45 °C / 2250.2 Torr View Scheme