1: H2 / 10percent Pd/C / ethyl acetate; ethanol / 750.06 Torr / Ambient temperature 2: 91 percent / SO2 / H2O / 120 h / 35 - 40 °C 3: 92 percent / Dowex (OH(1-)) / H2O / 0.75 h 4: 97 percent / H2 / PtO2 / H2O; ethanol / 18 h / 750.06 Torr / Ambient temperature View Scheme

1: With trifluoroacetic acid in water T=25°C; 2.5 h; 2: With hydrogenchloride; palladium 10 on activated carbon; hydrogen in methanol P=4137.29 Torr; 24 h;

1: With trifluoroacetic acid in water T=25°C; 2.5 h; 2: With hydrogenchloride; palladium 10 on activated carbon; hydrogen in methanol P=4137.29 Torr; 24 h;