- Esterification of 1,2-dichloro-1,1,2-trifluoro-2-methoxyethane with AlFm(OH)3-m
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Porous AlFm(OH)3-m was prepared by heating AlF3·3H2O. Methyl chlorodifluoroacetate was synthesized in 77% yield by the reaction of 1,2-dichloro-1,1,2-trifluoro-2-methoxyethane with AlFm(OH)3-m/s
- Quan, Heng-Dao,Tamura, Masanori,Gao, Ren-Xiao,Sekiya, Akira
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- Fluorination of chlorofluoroether using catalysts supported by porous aluminum fluoride
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Reaction of 1,2-dichloro-1,1,2-trifluoro-2-methoxyethane with anhydrous hydrogen fluoride (AHF) was investigated in the presence of metal fluorides supported on porous aluminum fluoride (PAF). 2-Chloro-1,1,2,2-tetrafluoro-2-methoxyethane, a new compound,
- Sekiya,Quan,Tamura,Gao,Murata
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- Synthesis, characterisation and mass spectrometric fragmentation of O-(chlorodifluoroacylated) alcohols
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An indirect and uncatalysed esterification of chlorodifluoroacetic acid with polyfluoro and hydrocarbon alcohols has been developed. The method which involves the reaction between sodium chlorodifluoroacetate and alcohols in dimethylformamide (DMF) is par
- Bhadury, Pinaki S.,Palit, Meehir,Sharma, Mamta,Raza, Syed K.,Jaiswal, Devendra K.
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- Preparation and application of porous calcium fluoride - A novel fluorinating reagent and support of catalyst
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A novel material, porous calcium fluoride (PCF) with more than 60m2/g surface area, was prepared by the reaction of soda lime (SL) with anhydrous hydrogen fluoride (AHF), and its application as a fluorinating reagent and support of catalyst was investigated.
- Quan, Heng-Dao,Tamura, Masanori,Gao, Ren-Xiao,Sekiya, Akira
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- Defluorination of homologous chlorofluoroethers to chlorofluoroacetates
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The research was focused on the defluorination of chlorofluoroethers to corresponding esters using porous aluminum fluoride (PAF) or MFn/PAF. In the work up process, the product was easily separated from the reagent. Thus, the reaction would be a practical preparation method for polyfluorinated esters. Trifluoromethyl chlorodifluoroacetate was obtained by the reaction of 1,2-dichlorotrifluoroethyltrifluoromethyl ether with fuming sulfuric acid in 49% yield.
- Quan, Heng-Dao,Tamura, Masanori,Gao, Ren-Xiao,Sekiya, Akira
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- Porous aluminum fluoride
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A porous aluminum fluoride on which SbClxF5-x (wherein x represents a numeral of 0 to 5) is supported, SbClxF5-x being obtainable by supporting SbCl, or the like on a porous aluminum fluoride and treating it with hydrogen fluoride. The resulting porous aluminum fluoride has a high activity as a fluorinating agent, a fluorination catalyst, or the like, is easy to handle, can be used for a flow-type reaction, and also can be used even at a high temperature.
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Page/Page column 4
(2008/06/13)
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- Preparation of compounds comprising a CHF2 or CHF group
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Producing compounds (I) with a mono- or difluoromethyl group from compounds (II) with a mono- or difluorohalomethyl group, where halo is bromo, iodo or preferably chloro, comprises reacting (II) with zinc in the presence of an alcohol. An independent claim is also included for an azeotropic mixture of methyl difluoroacetate and methanol.
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Page/Page column 3; 4
(2008/06/13)
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- Process for producing carboxylic acid esters from carboxylic acid halides and alcohols
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A process for preparing carboxylic esters from carboxylic acid halides or carboxylic anhydrides by reacting one of these starting materials with an alcohol under the catalytic action of "onium" or metal salts of carboxylic acids to obtain high yields of products in anhydrous form in a technically simple manner. The process is especially well suited for preparing 1,1,1-trifluoroethyl trifluoroacetate.
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- Zinc(0)-Copper(I) Chloride Promoted Reaction of Methyl Dichlorofluoroacetate with Carbonyl Compounds. A New Efficient Method for the Synthesis of Methyl (Z)-α-Fluoro-α,β-unsaturated Carboxylates
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Methyl dichlorofluoroacetate, easily prepared from methyl trichloroacetate and antimony(III) fluoride, underwent the reductive coupling-elimination raection with carbonyl compounds in the presence of zinc(0), a catalytic amount of copper(I) chloride, acetic anhydride, and molecular sieves to give the corresponding (Z)-α-fluoro-α,β-unsaturated carboxylic acid methyl esters in high yields.
- Ishihara, Takashi,Kuroboshi, Manabu
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p. 1145 - 1148
(2007/10/02)
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