2-Amino-5-bromo-4-chloropyridine can. It's a tiny molecule: one six-membered pyridine ring carrying an amino group, a bromine atom, and a chlorine atom. But those attachments don't all behave the same way.
That's exactly what makes the molecule useful. Under carefully chosen conditions, chemists can react at the carbon carrying bromine while leaving the chlorine in place.
Global Chemical Database