How is 4-Bromo-1-chloro-2-methylbenzene (CAS: 54932-72-8) typically synthesized?

4-Bromo-1-chloro-2-methylbenzene (CAS: 54932-72-8) can be synthesized via the chlorination of 4-bromo-2-methylbenzene followed by bromination, or through bromination and subsequent chlorination of 2-methylbenzene. These reactions are typically carried out under anhydrous conditions using reagents like bromine and chlorine, with DBU as a catalyst. High selectivity and good yield can be achieved under optimized conditions.