335-42-2Relevant articles and documents
THE FACILE PREPARATION OF HF FREE POLYFLUORINATED ACYL FLUORIDES
Cox, Daryl G.,Sprague, Lee G.,Burton, Donald J.
, p. 383 - 388 (1983)
The reaction of polyfluorinated acids with the Ishikawa Reagent (FAR) in the presence of NaF gives 59 - 91 percent isolated yields of HF free polyfluorinated acyl fluorides.The reaction is rapid, safe, easily scaled up, and amenable to a one-pot procedure.
Method for preparing perfluoroisobutyryl fluoride by reaction kettle liquid-phase method
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Paragraph 0014-0016, (2020/02/10)
The invention belongs to the field of fluorine chemical industry, and particularly relates to a method for preparing perfluoroisobutyryl fluoride by a reaction kettle liquid-phase method; the perfluoroisobutyryl fluoride is prepared with hexafluoropropylene and carbonyl fluoride as raw materials and a 2-perfluoroalkylbenzothiazole compound as a catalyst. Compared with a traditional reaction kettleliquid-phase one-pot method for preparing perfluorobutyryl fluoride, the method has the advantages that the 2-perfluoroalkylbenzothiazole compound is used as the catalyst, can be dissolved in an acetonitrile solvent and is uniformly coated around the raw material hexafluoropropylene, and the electron donor and acceptor properties of the perfluorobutyryl fluoride can tightly combine carbonyl fluoride free radicals, hexafluoropropylene free radicals and isobutyryl fluoride free radicals generated under an alkaline condition, so as to be beneficial to shortening the reaction time.
Heptafluorobutyric acid and preparation method of derivative thereof
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Paragraph 0102; 0103, (2017/07/18)
The invention provides a preparation method of heptafluorobutyric acid. The preparation method comprises the following steps: (A) carrying out an electrochemical fluoridation reaction on n-butyric acid, n-butyryl chloride or n-butyryl fluoride with anhydrous hydrogen fluoride, thus obtaining an electrolytic mixed gas, wherein the current density of the electrochemical fluoridation reaction is 0.025 to 0.033 A/cm, and the reaction temperature is 9 to 13 DEG C; a cooling reflux device is arranged in the electrochemical fluoridation reaction, and the temperature of a cooling medium of the cooling reflux device is -45 DEG C; (B) pumping the electrolytic mixed gas obtained in the step (A) into a reaction kettle filled with an acid-binding agent, thus obtaining heptafluorobutyryl fluoride, wherein the acid-binding agent is triethylamine; (C) mixing the heptafluorobutyryl fluoride obtained in the step (B) with water, and hydrolyzing, thus generating a heptafluorobutyric acid water solution; (D) mixing the heptafluorobutyric acid water solution with KOH, and naturally crystallizing until the concentration of the KOH is 40 to 45 percent, thus obtaining potassium heptafluorobutyrate; (E) acidizing the potassium heptafluorobutyrate by using sulfuric acid, thus obtaining the heptafluorobutyric acid.