1: 85 percent / acetone / 72 h / 20 °C 2: 63 percent / aq. HCl / 336 h / 5 °C 3: aq. HCl / 0.17 h / Heating View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: toluene / 2 h / |Reflux; |Cooling with ice<br />2: tetrahydrofuran / 2 h / |Reflux<br />3: sulfuric acid / 2 h / 50 &deg;C / |Cooling<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '2037554', constants.ctx, '0')">sulfuric acid</a> <br />&nbsp;1.) H₂O, 2 d, 2.) RT, 5h;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;