How is 4-Bromo-5-chloro-2-methoxyaniline (CAS: 102170-53-6) typically synthesized?

4-Bromo-5-chloro-2-methoxyaniline (CAS: 102170-53-6) is typically synthesized via a multistep process involving bromination, chlorination, and methylation of aniline. Common synthesis methods include the use of bromine and chlorine as reagents, with concentrated sulfuric acid as a catalyst. The reaction conditions and selectivity can be controlled to achieve high yields. This compound is often prepared in a fume hood to manage the volatile and reactive intermediates.