hydrogen; sodium acetate; palladium on activated charcoal in methanol T=45°C; P=2250.2 Torr;

1: 84 percent / H2, NaOAc / 5percent Pd/C / methanol / 45 °C / 2250.2 Torr 2: pyridine / 5 h / Ambient temperature 3: 96 percent / diisopropylammonium-tetrazolide / CH2Cl2 / Ambient temperature View Scheme