How is 3-Bromo-4-pyridinethiol (CAS: 82264-72-0) typically synthesized?

3-Bromo-4-pyridinethiol can be synthesized by the reaction of 4-pyridinethiol with bromine in the presence of a suitable solvent. Common solvents include dichloromethane or ethanol. The reaction is carried out at room temperature, and the use of a catalyst such as iron(III) chloride can improve the yield and selectivity. The overall reaction is highly exothermic and requires careful handling to prevent the formation of unwanted by-products.