How is 1-Bromo-4-ethoxy-2,3-difluorobenzene (CAS: 156573-09-0) typically synthesized?

1-Bromo-4-ethoxy-2,3-difluorobenzene (CAS: 156573-09-0) is typically synthesized through the reaction of 2,3-difluorobenzoic acid with a mixture of bromine and ethyl bromide. The process involves bromination followed by ethoxylation. Optimal conditions include the use of a catalytic amount of a Lewis acid such as aluminum chloride to enhance the reaction rate and yield. The product is isolated by recrystallization from appropriate solvents.