1.1: LiAlH4 / tetrahydrofuran / 20 h / Heating 2.1: 100 percent / Et3N / CH2Cl2 / 0 - 20 °C 3.1: NaH / dimethylformamide / 0.33 h / 20 °C 3.2: 52 percent / dimethylformamide / 14 h / 90 °C 4.1: 96 percent / hydrogen / Pd/C / acetic acid; propan-2-ol / 15 h / 50 °C / 4500.36 Torr View Scheme

lithium aluminium tetrahydride in tetrahydrofuran 20 h; Heating;