How is pentafluorobenzoyl chloride (CAS: 2251-50-5) typically synthesized?

Pentafluorobenzoyl chloride is typically synthesized by the reaction of pentafluorobenzoyl bromide with hydrogen chloride. This synthesis can occur under mild conditions, but catalysts such as aluminum chloride are often used to improve yield and selectivity. The process usually involves refluxing the mixture to promote reaction completion.