How is Sodium 4-fluorobenzenesulfinate (CAS: 824-80-6) typically synthesized?

Sodium 4-fluorobenzenesulfinate (CAS: 824-80-6) is typically synthesized by the reaction of sodium sulfinate with 4-fluorobenzenesulfonyl chloride. The synthesis involves the use of a phase-transfer catalyst to improve the reaction yield. The process requires careful control of temperature and reagent proportions to achieve high selectivity and yield, typically resulting in a yield of 70-80%. The product is usually purified by recrystallization or column chromatography.