1: 70 percent / LiAlH4 / tetrahydrofuran / 2 h / 0 °C 2: 42 percent / NaH / tetrahydrofuran / 18 h / 0 - 20 °C 3: 56 percent / LiAlH4 / tetrahydrofuran / 2 h / 0 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran T=0°C; 2 h;