- PERFLUOROALKYL SULFONAMIDE AND METHOD FOR PRODUCING THE SAME
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PROBLEM TO BE SOLVED: To simply provide high-purity perfluoroalkyl sulfonamide by efficiently reducing bis(perfluoroalkyl sulfone)imide, an impurity to be generated in a production process. SOLUTION: High-purity perfluoroalkyl sulfonamide is obtained by reducing bis(perfluoroalkyl sulfone)imide by washing perfluoroalkyl sulfonamide expressed by the following formula (1), which contains the bis(perfluoroalkyl sulfone)imide, with a chlorinated solvent: RfSO2 NH2, provided that, in the formula (1), Rf is a straight or branched 1-4C perfluoroalkyl group. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
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Paragraph 0075-0079
(2018/06/05)
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- Perfluorinated bronsted 'superacids': Powerful catalysts for the preparation of vitamin E
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The key-step in the industrial synthesis of (all-rac)-α-tocopherol (synthetic vitamin E) is the condensation reaction of trimethylhydroquinone with the C20 building block isophytol. For this Friedel-Crafts-type reaction, perfluorinated NH- and CH-acidic compounds (perfluoroalkyl(aryl) sulfonyl imides and methides) have been applied as excellent catalysts, preferably in biphasic solvent systems.
- Netscher, Thomas,Bonrath, Werner,Haas, Alois,Hoppmann, Eike,Pauling, Horst
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p. 153 - 155
(2007/10/03)
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