Quoting latex code

[andrea <andrea.crotti.0@gmail.com>]

I want to do something which I think should be really simple.
I'm writing a small guide of latex for org-users, useful for people
working with me that don't know latex but must insert some symbols in
org-files.

So I want to create simple tables where I insert the symbol and the
output.
But however I insert \phi|\pi|whatever it gets always transformed into
the symbol when exporting to pdf.

(also \mbox doesn't work)
How could I do to get something like this:

literal(\phi) -> \phi

Without possibly having to write some
#+BEGIN...
Thanks