1: sodium ethanolate / ethanol / |Reflux 2: trichlorophosphate / 48 h / |Reflux 3: tetrakis(triphenylphosphine) palladium(0); sodium carbonate; PivNHOH / chlorobenzene / 120 °C / |Inert atmosphere View Scheme

sulfuric acid 1 h;

1: sodium ethanolate / ethanol / |Reflux 2: trichlorophosphate / 48 h / |Reflux View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: triethylamine / 1,2-dichloro-ethane / 2 h / |Reflux<br />2: pyridine / tetrahydrofuran / |Reflux<br /> <br /> &nbsp;