hydrogen; palladium on activated charcoal Catalytic hydrogenation;

<b>Multi-step reaction with 3 steps<br /> </b>1: Zn / benzene / 3 h / Heating<br />2: SOCl₂; pyridine / 1 h / 110 &deg;C<br />3: aq. KOH / ethanol / 4 h / 70 &deg;C<br /> <br /> &nbsp;

&nbsp;(i) NaOMe, MeOH, (ii) aq. NaOH;&nbsp;&nbsp;Multistep reaction;&nbsp;<br /> &nbsp;