1.1: sodium periodate / methanol; water 2.1: sodium dihydrogenphosphate; sodium chlorite / methanol; dichloromethane; water / 20 °C 3.1: benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / dichloromethane / 0 °C 3.2: 16 h / 20 °C 4.1: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 3 h / 0 - 20 °C 5.1: palladium 10 on activated carbon; hydrogen / methanol / 24 h View Scheme

1: sodium periodate / methanol; water 2: sodium dihydrogenphosphate; sodium chlorite / methanol; dichloromethane; water / 20 °C 3: potassium carbonate / methanol / 20 °C 4: palladium 10 on activated carbon; hydrogen / methanol View Scheme