1: 1) CrCl3, LiAlH4, 2) DIBAL / 1) THF, 0 deg C, 10 min to r.t., 45 min, 2) CH2Cl2, -50 deg C, 30 min 2: 33 percent / 1) CuSO4/SiO2, 2) 46percent HF / 1) C6H6, 50 deg C, 1.5h, 2) MeOH, THF, r.t., 5h View Scheme