- Synthesis and use of partially fluorinated dialkyl ethers derived from hexafluoropropylene
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A procedure was developed for preparing partially fluorinated dialkyl ethers by the reaction of hexafluoropropylene with aliphatic and polyfluorinated alcohols in the presence of KOH. On treatment with concentrated sulfuric acid, these ethers form alkyl esters of acids, and on treatment with KOH, alkenyl ethers.
- Il'in,Bakhmutov,Ivanova,Furin,Tolstikova,Sukhinin
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Read Online
- Method for removing unsaturated impurities in 1, 1, 2, 3, 3 and 3 - hexafluoropropyl hydrofluoroether crude product
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The invention provides a method of removing 1. [] The hydrofluoroether impurities, pentafluoropropylene hydrofluoroether, and, 1 1 pentafluoropropylene 2 hydrofluoroether 3 impurities 3 can 3 - be well separated to provide, hexafluoropropyl hydrofluoroether product 1 having a 1 2 purity of 3 3 - at least. 1 2 1, 2, 3, 3, 3 - 3 1 1 3 3 - 99% 3 3 - 2 3The method does not use dangerous chemical, greatly improves the operation safety, does not generate waste harmful to the environment, and can be regenerated and reused by the adsorbent silica gel column. Cost is reduced, and resources are saved.
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Paragraph 0057-0064
(2021/10/27)
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- Fluorine gas for life science syntheses: Green metrics to assess selective direct fluorination for the synthesis of 2-fluoromalonate esters
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Optimisation and real time reaction monitoring of the synthesis of 2-fluoromalonate esters by direct fluorination using fluorine gas is reported. An assessment of green metrics including atom economy and process mass intensity factors, demonstrates that the one-step selective direct fluorination process compares very favourably with established multistep processes for the synthesis of fluoromalonates.
- Harsanyi, Antal,Sandford, Graham
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supporting information
p. 3000 - 3009
(2015/05/27)
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- Palladium(0)-catalyzed hydroalkoxylation of hexafluoropropene: Synthesis of hydrofluoroethers under neutral conditions
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No vinyl ether by-products are formed in the palladium(0)-complex catalyzed hydroalkoxylation of hexafluoropropene (see scheme). Saturated hydrofluoro-ethers are selectively synthesized with alcohols or phenols under neutral conditions in the presence of
- Matsukawa, Yasuhisa,Mizukado, Junji,Quan, Heng-Dao,Tamara, Masanori,Sekiya, Akira
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p. 1128 - 1130
(2007/10/03)
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- Transformation de l'hexafluoropropene en alcool trifluoroallylique, precurseur des α-fluoroacrylates
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The fluoroacryloyl fluoride precursor of α-fluoroacrylic acid esters can arise from an allylic transposition of trifluoroallylic alcohol of which two methods of preparation are presented.In the first, dehydrofluoration of the alcohol CF3CFHCH2OH (4) is used.This alkohol is generated from the ester CF3CFHCOOC2H5 (3).In the second, dehalogenation of the alcohol CF3CFBrCH2OH (10) by zinc is used.The latter is formed by the selective reduction of the ester CF3CFBrCOOC2H5 (9). - Keywords: 2H-Tetrafluoropropanoic acid ester; 2H-Tetrafluoropropanol-1; Trifluoroallylic alcohol; α-Fluoroacryloyl fluoride; NMR spectroscopy
- Nguyen, Thoai,Wakselman, Claude
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p. 273 - 278
(2007/10/03)
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- FACILE SYNTHESIS OF DIALKYL FLUOROMALONATES AND THEIR DERIVATIVES
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Dimethyl and diethyl fluoromalonates were prepared by the stepwise basic alcoholysis of hexafluoropropene in a total yield of 50 - 55 percent.These dialkyl fluoromalonates were alkylated with alkyl halides, and the resulting dialkyl α-fluoroalkylmalonates were cyclized with urea affording 5-fluorobarbituric acid derivatives.
- Ishikawa, Nobuo,Takaoka, Akio
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p. 107 - 110
(2007/10/02)
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