1: hydrogen / palladium 10 on activated carbon / ethyl acetate / 4 h / 20 °C 2: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol; 4-methyl-morpholine / dichloromethane / 6.5 h / 20 °C 3: hydrogenchloride; hydrogen / palladium 10 on activated carbon / industrial methylated spirits / 5.5 h / 20 °C View Scheme