Processes for producing high-purity N,N-dialkyl perfluoroalkylsulfonamide
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United States of America Patent
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Jun 20, 2023
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Dec 5, 2022
filing date -
Dec 7, 2021
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Abstract
Processes for producing a N,N-dialkyl perfluoroalkyl-sulfonamide product of the formula Rf—S(O)2—NRaRb (I) in which Rf represents fully or partially fluorinated alkyl groups with carbon 1 to 12 and Ra and Rb represents linear or branched or cyclic alkyl, alkene or alkyne groups with carbon 1 to 12, wherein Ra=Rb or Ra≠Rb. In some embodiments, a reaction proceeds by contacting a perfluoroalkylsulfonyl halide of the formula: X—S(O)2—Rf, (II), in which X represents F, Cl, Br or I, with dialkylamine of the formula HNRaRb, under conditions sufficient to produce the desired N,N-dialkyl perfluoroalkylsulfonamide product of Formula I. In some embodiments, the reaction is carried out using a solvent of Formula I.
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