1: 1) sec-BuLi / 1) THF, hexane, -78 deg C, 2) -78 deg C to room temperature 2: 95 percent / SOCl2 / benzene / Heating 3: 58 percent / CsF / acetonitrile / 5 h / Heating 4: 94 percent / lithium aluminum hydride / diethyl ether / 2 h / Heating View Scheme