oxidizing agent Yield given. Yields of byproduct given;

1: 80 percent / diethyl ether 2: 89 percent / LiAlH4 View Scheme

With  sodium hydroxide; pig-liver esterase; sodium salt of phosphorous acid in  water 96 h;  pH 8.0;   

Multi-step reaction with 4 steps 1: NaBH4 / methanol2: 62 percent / pyridinium chlorochromate / CH2Cl2 / 1.5 h3: 74.8 percent / n-BuLi / 1.) THF, hexane, -40 deg C, 2.) THF, r.t., 5 h4: 71 percent / alcoholic 2 N KOH