1.1: palladium 10 on activated carbon; hydrogen / ethyl acetate / 4 h / 20 °C 2.1: triethylamine / dichloromethane / 1 h / 0 °C / Inert atmosphere 3.1: sodium azide / N,N-dimethyl-formamide / 4 h / 80 °C / Inert atmosphere 4.1: palladium 10 on activated carbon; hydrogen; potassium carbonate / methanol / 4 h / 20 °C 5.1: borane-THF / 5 h / Inert atmosphere; Reflux 5.2: 0.5 h / 0 - 20 °C / Inert atmosphere 6.1: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / Inert atmosphere 7.1: Dess-Martin periodane / dichloromethane / 1 h / 20 °C / Inert atmosphere 8.1: pyridine / ethanol / 0.5 h / 20 °C / Inert atmosphere 9.1: borane-THF / tetrahydrofuran / 4 h / 50 °C / Inert atmosphere 10.1: sodium tetrahydroborate / methanol / Inert atmosphere 11.1: hydrogenchloride / methanol; water / Inert atmosphere View Scheme