1.1: cerium(III) chloride / methanol / 0.17 h / 20 °C 1.2: 3 h / -40 °C 2.1: methanesulfonic acid / dichloromethane; toluene / 3 h / 20 °C 3.1: toluene-4-sulfonic acid / benzene / 8 h / Reflux 4.1: diisobutylaluminium hydride / dichloromethane; toluene / 3 h / -78 °C 5.1: triethylamine / 12 h / 20 °C 6.1: methanesulfonyl chloride; triethylamine / dichloromethane / 0 - 20 °C 7.1: sodium tetrahydroborate / ethanol / 0 - 20 °C 8.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C 9.1: triethylamine / tetrahydrofuran / 0 - 20 °C 10.1: trifluoroacetic acid / 1,2-dichloro-ethane / 8 h / 50 °C 11.1: triethylamine / dichloromethane / 0 - 20 °C 12.1: palladium diacetate; p-benozquinone / acetonitrile / 0 - 50 °C 13.1: L-Selectridereg; / tetrahydrofuran / -78 - 20 °C 14.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 50 °C View Scheme

1.1: cerium(III) chloride / methanol / 0.17 h / 20 °C 1.2: 3 h / -40 °C 2.1: methanesulfonic acid / dichloromethane; toluene / 3 h / 20 °C 3.1: toluene-4-sulfonic acid / benzene / 8 h / Reflux 4.1: diisobutylaluminium hydride / dichloromethane; toluene / 3 h / -78 °C 5.1: triethylamine / 12 h / 20 °C 6.1: methanesulfonyl chloride; triethylamine / dichloromethane / 0 - 20 °C 7.1: sodium tetrahydroborate / ethanol / 0 - 20 °C 8.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C 9.1: triethylamine / tetrahydrofuran / 0 - 20 °C 10.1: trifluoroacetic acid / 1,2-dichloro-ethane / 8 h / 50 °C 11.1: L-Selectridereg; / tetrahydrofuran / -78 - 20 °C 12.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 45 °C View Scheme