1: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 12 h / 0 °C 2: sodium cyanoborohydride; acetic acid / tetrahydrofuran / 144 h / 0 °C 3: hydrogenchloride / 2,2,2-trifluoroethanol; water / 0.5 h / 20 °C 4: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / 12 h / 20 °C 5: methanol / 2.5 h / 20 °C 6: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / 12 h / 20 °C 7: silica gel / chloroform; ethyl acetate / 0.25 h 8: AZADO; [bis(acetoxy)iodo]benzene / dichloromethane / 4 h / 20 °C 9: hydrogen fluoride / water; acetonitrile / 1.5 h / 20 °C 10: pyridine; dichlorotriphenylphosphorane / acetonitrile / 2 h / 20 °C View Scheme