How is 2,2,2-Trifluoroethyl 1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonate (CAS: 79963-95-4) typically synthesized?

2,2,2-Trifluoroethyl 1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonate is typically synthesized through a series of fluorination and sulfonation reactions. The process involves the use of trifluoroethyl chloride and nonafluoro-1-butanesulfonyl fluoride as precursors. Catalysts such as aluminum chloride are often used to enhance the reaction selectivity and yield.