sulfuric acid in ethanol

<b>Multi-step reaction with 4 steps<br /> </b>1: p-toluenesulfonic acid / Heating<br />2: diisobutylaluminum hydride / toluene / 2 h / cooling<br />3: benzene<br />4: cyclohexane / 1 h / 25 &deg;C / UV-irradiation<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: diisobutylaluminum hydride / toluene / 2 h / cooling<br />2: benzene<br />3: cyclohexane / 1 h / 25 &deg;C / UV-irradiation<br /> <br /> &nbsp;