1.1: acetic acid; sodium tris(acetoxy)borohydride / toluene / 16 h / 5 - 20 °C / Molecular sieve 2.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.25 h / 0 - 20 °C 2.2: 16 h / 0 °C 3.1: triethylamine / tetrahydrofuran / 1 h / 0 - 20 °C 4.1: caesium carbonate / tetrahydrofuran / 18 h / 60 °C 5.1: hydrogen / 20 palladium hydroxide on carbon / ethanol / 48 h / 50 °C / 3102.97 Torr View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: triethylamine; hydrogen / 20 palladium hydroxide on carbon / ethanol / 24 h / 3102.97 Torr<br />2: toluene / 72 h / Reflux; Dean-Stark apparatus<br /> <br /> &nbsp;