1.1: diisobutylaluminium hydride / dichloromethane / 5 h / -78 °C / Inert atmosphere 1.2: 20 h / -78 - 20 °C 2.1: sodium periodate; ruthenium(III) chloride*(x)H2O; water / tetrachloromethane; acetonitrile / 20 °C 3.1: potassium carbonate / acetone / 20 h / 20 °C / Inert atmosphere View Scheme