Is there a way to form only ortho product without using fractional distillation?


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> Using benzene and ethane as your only source of carbon in the final molecule, synthesize the following using any useful reagents. Reaction must form pure ortho compound.
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> [![4‐[(1E)‐2‐(2‐propylphenyl)diazen‐1‐yl]phenol](https://i.stack.imgur.com/shPvK.png)](https://i.stack.imgur.com/shPvK.png)
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I have to form the product shown in the picture with only the ortho position formed. I'm not sure how to do this other than with fractional distillation, but I doubt that's what my professor is expecting from me, so there must be another way I am not thinking of.


