1: 85 percent / aluminum hydride / tetrahydrofuran / 2 h / 0 °C 2: 38 percent / PPh3, CBr4 / CH2Cl2 / 0.5 h / -10 °C 3: 80 percent / acetonitrile / 2 h / Ambient temperature 4: 1) BuLi, 2) HMPA / 1) hexane, THF, -78 deg C, 20 min, 2) THF a) -78 deg C, 20 min, -40 deg C, 30 min 5: 92 percent / Bu4NF / tetrahydrofuran / 4 h / Ambient temperature 6: potassium carbonate, water / methanol / Ambient temperature View Scheme