1: L-Selectridereg; / tetrahydrofuran / 4 h / -78 °C / |Inert atmosphere 2: hydrogen; palladium on activated charcoal / methanol / 3 h / 20 °C 3: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1.1: triphenylphosphine / tetrahydrofuran / 1 h / 20 &deg;C / |Inert atmosphere<br />1.2: 0.42 h / 20 &deg;C / |Inert atmosphere; |Sonication<br />2.1: triphenylphosphine; gold(III) chloride; silver trifluoromethanesulfonate / dichloromethane / 7 h / 20 - 50 &deg;C / |Inert atmosphere<br />3.1: Dess-Martin periodane / dichloromethane / 2 h / 0 - 20 &deg;C / |Inert atmosphere<br /> <br /> &nbsp;