1: LiHMDS / THF 1) 1 h, -78 deg C 2) 2 h, -10 deg C 3) 1 h, -78 deg C 4) 16 h, r.t. 2: 81 percent / 0.5percent H2SO4 / acetic acid / 1 h / 95 - 100 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran 3 h; Heating;

Multi-step reaction with 2 steps 1: 79 percent / LiAlH4 / tetrahydrofuran / 3 h / Heating2: 75 percent / pyridinium chlorochromate / CH2Cl2 / 4 h / Ambient temperature