This can be done using the Friedel-Crafts alkylation reaction. The general reaction is as follows:
\[
\text{{Benzene}} + \text{{R-Cl}} \xrightarrow{\text{{AlCl}}_3} \text{{R-Benzene}} + \text{{HCl}}
\]
where R-Cl is the alkyl halide and AlCl$_3$ is the catalyst.
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