How is 2-(Bromomethyl)-5-chloropyridine (CAS: 605681-01-4) typically synthesized?

2-(Bromomethyl)-5-chloropyridine (CAS: 605681-01-4) can be synthesized by bromomethylation of 5-chloropyridine. This process typically involves the reaction of 5-chloropyridine with bromine in the presence of a catalyst such as iron(III) bromide. The reaction is carried out under anhydrous conditions to minimize side reactions and improve yield. The product is obtained as a crystalline solid with a typical yield of around 80%.