perchloric acid; hydrogen; palladium on activated charcoal in methanol; water T=60°C; 10 h;

1: 100 percent / POCl3 / 1.5 h / Ambient temperature 2: 100 percent / NaBH4 / methanol / 0.5 h / Ambient temperature 3: 50 percent / H2 / 10percent Pd-C / ethanol / 19 h / 50 °C View Scheme