How is 2-Bromo-4-chlorobenzaldehyde (CAS: 84459-33-6) typically synthesized?

2-Bromo-4-chlorobenzaldehyde is typically synthesized through a series of reactions starting from 4-chlorobenzaldehyde. It involves the bromination of 4-chlorobenzaldehyde using bromine in the presence of a base. The reaction is selective and yields a high percentage of the desired product. Commonly used solvents include dichloromethane, and the reaction is conducted under mild conditions to maintain selectivity.