1: 91.7 percent / H2 / Pd-C / methanol 2: 82.7 percent / 1-ethyl-3-(3-dimethylaminoproyl)carbodiimide hydrochloride / CH2Cl2 / 2 h 3: 43 percent / CF3COOH / H2O / 0.5 h / 0 °C 4: 1) 2-fluoro-1-methylpyridinium p-toluenesulfonate, 2) NaN3 / 1) CHCl3, room tempetarure, 1h, 2) HMPA, 80 deg C, 2 h 5: H2 / Pd-C View Scheme