1.1: 1H-imidazole / dichloromethane / 2 h / 20 °C 2.1: dIpc2BH / tetrahydrofuran / 5 h / 0 - 20 °C 2.2: 1.75 h / 0 - 12 °C 3.1: Dess-Martin periodane / dichloromethane / 0.5 h / 20 °C 4.1: triethylamine / dichloromethane / 1 h / 0 - 5 °C 5.1: 3-chloro-benzenecarboperoxoic acid; disodium hydrogenphosphate / dichloromethane / 2.5 h / -25 °C 5.2: -25 - 20 °C 6.1: titanium tetrachloride / tetrahydrofuran / 3.5 h / -40 - 20 °C 7.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / -20 °C 8.1: toluene-4-sulfonic acid; methanol / 4 h / 0 - 20 °C 9.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 1.5 h / 20 °C 10.1: sodium hydroxide; water / 3.5 h / 72 °C 10.2: 0 °C / pH 6.3 View Scheme

1.1: dIpc2BH / tetrahydrofuran / 5 h / 0 - 20 °C 1.2: 1.75 h / 0 - 12 °C 2.1: Dess-Martin periodane / dichloromethane / 0.5 h / 20 °C 3.1: triethylamine / dichloromethane / 1 h / 0 - 5 °C 4.1: 3-chloro-benzenecarboperoxoic acid; disodium hydrogenphosphate / dichloromethane / 2.5 h / -25 °C 4.2: -25 - 20 °C 5.1: titanium tetrachloride / tetrahydrofuran / 3.5 h / -40 - 20 °C 6.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / -20 °C 7.1: toluene-4-sulfonic acid; methanol / 4 h / 0 - 20 °C 8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 1.5 h / 20 °C 9.1: sodium hydroxide; water / 3.5 h / 72 °C 9.2: 0 °C / pH 6.3 View Scheme

1: lithium triethylborohydride / tetrahydrofuran / -78 °C 2: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran 3: hydrogenchloride / tetrahydrofuran; methanol; water / 55 °C View Scheme

1.1: triphenylphosphine / tetrahydrofuran / 0.25 h / 20 °C / |Inert atmosphere 1.2: 0.17 h / -10 °C / |Inert atmosphere 1.3: 4 h / -10 °C / |Inert atmosphere 2.1: formic acid / 9 h / 50 °C / |Inert atmosphere 3.1: sodium methylate / methanol / 0.5 h / 20 °C / |Inert atmosphere View Scheme

1.1: 1H-imidazole / tetrahydrofuran / 5 h / 20 °C / |Inert atmosphere 2.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 15 h / 20 °C / |Inert atmosphere 3.1: triethylamine; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 1 h / 0 - 20 °C / |Inert atmosphere 4.1: bis(cyclopentadienyl)titanium dichloride; cis-IrCl(CO)(PPh3)2; manganese; 2,4,6-trimethyl-pyridine; chloro-trimethyl-silane; hydrogen / tetrahydrofuran / 4 h / 20 °C / 3000.3 Torr 5.1: triethylamine; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 2 h / 0 - 20 °C / |Inert atmosphere 6.1: (1S)-10-camphorsulfonic acid / methanol / 3 h / 0 - 20 °C / |Inert atmosphere 7.1: triphenylphosphine / tetrahydrofuran / 0.25 h / 20 °C / |Inert atmosphere 7.2: 0.17 h / -10 °C / |Inert atmosphere 7.3: 4 h / -10 °C / |Inert atmosphere 8.1: formic acid / 9 h / 50 °C / |Inert atmosphere 9.1: sodium methylate / methanol / 0.5 h / 20 °C / |Inert atmosphere View Scheme

1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / 14 h / -23 - 20 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C 3: hydrogenchloride; water / tetrahydrofuran / 8 h / |Reflux View Scheme

1.1: triphenylphosphine / tetrahydrofuran / 0.17 h / 20 °C 1.2: 0.67 h / 20 °C 2.1: hydrogenchloride; water / dichloromethane / 18 h / 20 °C 2.2: 0.75 h / 20 °C / pH 7 - 8 View Scheme