How is 5-Bromo-3-fluoro-2-hydroxybenzaldehyde (CAS: 251300-28-4) typically synthesized?

5-Bromo-3-fluoro-2-hydroxybenzaldehyde is typically synthesized through the bromination of 3-fluoro-2-hydroxybenzaldehyde followed by purification. Commonly, this involves the use of bromine in the presence of a Lewis acid catalyst such as aluminum bromide. The reaction is carried out under anhydrous conditions to ensure high selectivity and yield. The product is then isolated and purified using standard techniques like recrystallization.