hydrogenchloride; 5 palladium on charcoal; hydrogen in methanol T=20°C; 3 h;

<b>Multi-step reaction with 3 steps<br /> </b>1: toluene-4-sulfonic acid / benzene / |Dean-Stark; |Reflux<br />2: lithium aluminium tetrahydride / diethyl ether / 2 h / 0 - 20 &deg;C<br />3: triphenylphosphine; carbon tetrabromide / dichloromethane / 3 h / 0 - 20 &deg;C<br /> <br /> &nbsp;