How is [(Difluoromethyl)sulfanyl]acetic acid (CAS: 83494-32-0) typically synthesized?

[(Difluoromethyl)sulfanyl]acetic acid is typically synthesized via the reaction of acetic anhydride with a difluoromethylthio alcohol. This process involves careful control of reaction conditions to achieve high yield and selectivity. Commonly used solvents include dichloromethane or acetonitrile, and the reaction is often catalyzed by a strong base like triethylamine.