- Synthesis method of halogenated butene
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The invention discloses a synthesis method of halogenated butene. The method comprises: (1) carrying out a fluorination reaction on hexachlorobutadiene and a fluorination reagent, and purifying the obtained reaction product to obtain fluorochlorobutane; and (2) carrying out a dehalogenation reaction on the fluorochlorobutane and a dehalogenation reagent in a first solvent, and purifying the obtained reaction product to obtain the halogenated butene. The method has the advantages of simple process, less three wastes, high yield, low cost and the like.
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Paragraph 0060-0063; 0066-0068; 0073-0076; 0081-0084
(2020/05/30)
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- FLUORINATION OF POLYHALOGENATED UNSATURATED COMPOUNDS WITH VANADIUM PENTAFLUORIDE
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Vanadium pentafluoride reacts with polyfluorinated and polychlorinated olefins, alkadienes, cycloalkenes and cyclodienes in CFCl3 or without a solvent at -25 deg C to 100 deg C, forming products of addition of two fluorine atoms across the C=C bond.
- Bardin, V. V.,Avramenko, A. A.,Furin, G. G.,Krasilnikov, V. A.,Karelin, A. I.,et al.
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p. 385 - 400
(2007/10/02)
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- REACTION OF POLYHALOGENATED UNSATURATED COMPOUNDS WITH VANADIUM PENTAFLUORIDE
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Terminal polyhalogenoalkenes are fluorinated by vanadium pentafluoride at -20 to -30 deg C, whereas internal polyfluoroalkenes only react with vanadium pentafluoride when heated. 2-Chloropentafluoro-1,3-butadiene adds fluorine atoms predominantly at positions 1,4 under the influence of vanadium pentafluoride, but only the isomeric tetrafluorohexachlorobutanes are formed from perchloro-1,3-butadiene.Fluorination of perfluoroallylbenzene and perfluoro-β-methylstyrene takes place more rapidly in the side chain than in the aromatic ring.
- Petrov, V. A.,Bardin, V. V.,Furin, G. G.,Avramenko, A. A.,Galakhov, M. V.,et al.
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- LITHIATION OF 1,2-DIFLUORODICHLOROETHENE AND 1,4-DICHLOROPERFLUOROBUTADIENE
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The lithiation of 1,2-dichlorodifluoroethene, 1,4-dichloroperfluorobutadiene, and 1,2-difluoro-1-chloro-2-ethoxyethene was investigated.In the dichloro derivatives of fluorinated olefins only one chlorine atom is exchanged for a lithium atom, and in the last compound the chlorine atom or the ethoxy group is exchanged.The corresponding carboxylic acids were obtained by the action of carbon dioxide on the lithium derivatives.
- Kremlev, M. M.,Moklyachuk, L. I.,Fialkov, Yu. A.,Yagupol'skii, L. M.
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p. 814 - 817
(2007/10/02)
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