695-44-3Relevant academic research and scientific papers
Synthesis of 1H-polychlorofluorocycloolefins
Yang, Gang,Zhang, Chengping,Yang, Hui-e,Quan, Hengdao
, p. 96 - 101 (2018)
The synthesis of 1H-polychlorofluorocycloolefin by the hydrodehalogenation of perchlorofluorocycloolefin containing –CCl=CCl– or –CCl=CF– group in dimethylformaide (DMF) or dimethylacetamide (DMAC) over Zn was investigated. It was found that the hydrodehalogenation of perchlorofluorocycloolefin occurred only on the C (sp2) position but not on C (sp3) position. In addition, the mechanisms of the hydrodehalogenation of perchlorofluorocycloolefin were proposed.
Process for the hydrolysis of halogenated cyclic olefins to prepare hydrohalocyclic olefins (by machine translation)
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Paragraph 0073-0074, (2020/07/28)
The invention relates to a method for preparing hydrohalobenzene by hydrolysis of halogenated cycloolefins, and belongs to the field of chemical synthesis. The method disclosed by the invention has the advantages of mild reaction conditions, high hydrohalobenzene selectivity, simple post-treatment and environmental protection, and can be effectively separated industrially by a common distillation means. 50 - 180 °C. The method of the invention has the advantages of mild reaction conditions, simple post-treatment and environmental protection. (by machine translation)
Method for preparing 1H-perhalogenated cycloolefin by adopting organic solvent to provide hydrogen source for hydrogen-halogen exchange reaction
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Paragraph 0067; 0068, (2017/12/14)
The invention relates to a method for preparing 1H-perhalogenated cycloolefin by adopting an organic solvent to provide a hydrogen source for hydrogen-halogen exchange reaction, and belongs to the field of chemical synthesis. The method includes: under the condition of presence of the solvent, adopting 1-chlorine-perhalogenated cycloolefin including 1,2-dichloro-3,3,4,4-tetrafluoro cyclobutene, 1-chloro-pentafluoro cyclobutene, 1,2-dichloro-hexafluoro cyclopentene, 1-chloro-heptafluoro cyclopentene, 1-chloro-hexafluro cyclohexene, 1,2-dichloro-octafluoro cyclopentene and the like as a raw material, enabling the raw material to react with zinc powder at a reaction temperature of 30-180 DEG C, and enabling selective hydrogen-halogen exchange reaction to prepare the 1H-perhalogenated cycloolefin. The method has the advantages that a reaction condition is mild, the 1H-perhalogenated cycloolefin is high in selectivity, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-Formyldiethylamine or N, N-Diethylacetamide is adopted to provide the hydrogen source for hydrogenation, safety and reliability in technology are realized, and the 1H-perhalogenated cycloolefin can be separated effectively through a normal distilling manner industrially.
Catalytic synthesis of polyfluoroolefins
Stepanov,Delyagina,Cherstkov
experimental part, p. 1290 - 1295 (2011/01/04)
A catalytic synthesis of polyfluoroolefins was developed proceeding from polyfluorochlorocarbons with the use of industrially produced nickel-chromium catalyst. Three ways of the catalytic synthesis of fluoroolefins were implemented: the cleavage of vicinal chlorine atoms from polyfluorochlorocarbons, the replacement of vinyl chlorine atoms by hydrogen in fluorochloroolrfins, and the reductive dimerization of polyfluorochlorocarbons containing a trichloromethyl group. The condition of a prolonged operation of the nickel-chromium catalyst was found consisting in the application of quartz for absorption of the hydrogen fluoride formed as a side product.
