- Perfluoroepoxycarboxylates. Preparation and some properties
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Perfluoroepoxycarboxylates were obtained by oxidation with molecular oxygen of esters of unsaturated perfluoroepoxycarboxylic acids CF2=CF(CF2)nCO2CH3 under UV irradiation. The isomeric transformations and thermal stability of the methyl pentafluoro-3,4-epoxybutanate were studied. In the reaction of the above compound with Et3N was obtained methyl tetrafluoro-3-fluoroformylpropanate, and with SbF5 on graphite arised methyl pentafluoroacetate.
- Zapevalov,Filyakova,Kodess
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p. 1113 - 1116
(2007/10/03)
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- Process for producing fluorinated acid fluoride having ester group
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A fluorinated acid fluoride having an ester group which has the formula STR1 wherein A,p, q and R are defined below is produced by reacting a diacid fluoride having the formula STR2 wherein A represents a C1 -C10 bifunctional perfluoro group; p represents 0 or 1; q represents an integer of 1 to 8 with an alcohol having the formula ROH wherein R represents an organic group.
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- Process for the preparation of ω-fluorosulfatoperfluoroalkanoic acid derivatives
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What are disclosed are methods for making compounds of the formula useful as intermediates for making perfluorinated vinyl ethers, wherein Rf is a single bond or perfluoralkylene and Y is fluorine or --OR, by heating an α,ω-bis-fluorosulfatoperfluoroalkane of the formula in the presence of an alkali metal fluoride and/or an alkali metal hydrogen fluoride and, when Y is OR, in the presence of an alkanol, ROH.
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- Process for producing fluorinated acyl fluoride having an ester group
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A fluorinated acyl fluoride having an ester group which has the formula wherein n is 2 to 4 and R represents an alcohol residual group is produced by reacting a perfluorolactone having the formula STR1 wherein n represents an integer of 2 to 4, with an alcohol having the formula wherein R represents an alcohol residual group.
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