How is 1-(2-Bromo-5-chlorophenyl)ethanone (CAS: 935-99-9) typically synthesized?

1-(2-Bromo-5-chlorophenyl)ethanone is typically synthesized by bromination of 1-phenylethanone followed by chlorination of the resulting 2-bromo-1-phenylethanone. Alternatively, it can be prepared by reacting 1-phenylethanone with bromine in the presence of a base, and then chlorinating the product. The reaction usually requires a mild base like potassium carbonate and is carried out in an inert solvent like dichloromethane.