hydrogen; palladium on activated charcoal in ethanol P=760 Torr; Ambient temperature;

<b>Multi-step reaction with 2 steps<br /> </b>1: 82 percent / t-BuOK / dimethylsulfoxide / Ambient temperature<br />2: 98 percent / TsOH*H₂O / benzene / 24 h / Ambient temperature<br /> <br /> &nbsp;