1: 90 percent / NaBH4 / Palladium on charcoal / methanol / 0.5 h / Ambient temperature 2: 1.)0.5N HCl, sodium nitrite / 1.)0-5 deg C, 5 min., 2.)H2O, 0-5 deg C, 20 min. 3: 53 percent / 1N NaOH / ethanol / 1 h / Heating 4: 65 percent / Trifluoroacetic acid, NaI / acetone / 1.)0-5 deg C, 2.)15 min., 25 deg C View Scheme