1: LiAlH4 / diethyl ether / a) RT, 10.5 h, b) reflux, 4 h 2: 1.) SOCl2, HMPA, 2.) Et3N / 1.) -5 deg C, 10 min, 2.) Et2O, RT, overnight 3: 37.2 percent / CrO3 / acetic acid; H2O / Ambient temperature 4: 68 percent / HBr / acetic acid / 1.5 h / Ambient temperature View Scheme