1: potassium carbonate / acetone / 20 °C / Inert atmosphere 2: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 3: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere 4: palladium 10 on activated carbon; hydrogen / methanol / 2 h / 20 °C / 3102.97 Torr / Inert atmosphere View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '472690', constants.ctx, '0')">toluene-4-sulfonic acid</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098229', constants.ctx, '0')">methanol</a> <br />T=20&deg;C;&nbsp;5&nbsp;h;&nbsp;<br /> <br /> &nbsp;