[derek0o0]

Why is aminobenzene less basic than cyclohexylamine?
It must be soemthing do with the benzene ring which the electrons are delocalised into it
But how can I explain this?

[macman104]

That is exactly why.  The lone pair, which the nitrogen uses to attract a proton is delocalized into the ring system.  It has less "lone-pair character" you might say, so it behaves less like a base.

Side note, I'm gonna move this over to organic chem