1: hydrogen / Pd/C / tetrahydrofuran / 3 h / 20 °C / 760.21 Torr 2: 85 percent / trifluoroacetic anhydride / 1,2-dichloro-ethane / 0 - 20 °C View Scheme

hydrogen; palladium on activated charcoal in tetrahydrofuran T=20°C; P=760.208 Torr; 3 h;