1: 83 percent / diethyl ether / 2 h / -10 °C 2: 84 percent / pyridinium chlorochromate, NaOAc / CH2Cl2 / 8 h / Ambient temperature 3: 85 percent / 10percent HCl / tetrahydrofuran / 44 h / Heating 4: 74 percent / anhyd. K2CO3 / ethanol / 2.5 h / Heating 5: 37 percent / LiAlH4 / diethyl ether / 1.) r.t., 5 h, 2.) reflux, 4 h View Scheme