How is 2-Bromo-3-chloro-5-fluoropyridine (CAS: 1214326-94-9) typically synthesized?

2-Bromo-3-chloro-5-fluoropyridine is typically synthesized through electrophilic aromatic substitution reactions. A common method involves the substitution of a pyridine ring with bromine followed by the introduction of a chlorine atom and a fluorine atom. Catalysts such as fuming sulfuric acid or Lewis acids are often used to enhance the reactivity and selectivity of the reactions.