1.1: NaH / tetrahydrofuran / 0.25 h / 20 °C 1.2: 59 percent / tetrahydrofuran / 0.5 h / Heating 2.1: 95 percent / H2 / Pd/C / ethyl acetate / 3 h / 20 °C 3.1: 67 percent / Na; liq. NH3 / 2 h / -78 - -30 °C 4.1: 430 mg / LiAlH / tetrahydrofuran / 2 h / Heating View Scheme