3761-95-3Relevant academic research and scientific papers
SELECTIVE REDUCTION OF 1-CHLORO-2-IODOPERFLUOROCYCLOALKENES WITH SODIUM TRIMETHOXYBOROHYDRIDE
Natarajan, Saraswathi,Soulen, Robert L.
, p. 447 - 452 (1981)
In contrast to other chemical reducing agents, it has been found that sodium trimethoxyborohydride will selectively reduce 1-chloro-2-iodoperfluorocycloalkenes to give good yields of 1-hydro-2-chloroperfluorocycloalkenes.The selective displacement of iodi
Process for the hydrolysis of halogenated cyclic olefins to prepare hydrohalocyclic olefins (by machine translation)
-
Paragraph 0039-0070, (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)
Synthesis of 1H-polychlorofluorocycloolefins
Yang, Gang,Zhang, Chengping,Yang, Hui-e,Quan, Hengdao
, p. 96 - 101 (2018/10/31)
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.
Method for preparing 1H-perhalogenated cycloolefin by adopting organic solvent to provide hydrogen source for hydrogen-halogen exchange reaction
-
Paragraph 0045; 0046, (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.
Preparation method of heptafluorocyclopentene
-
Paragraph 0010; 0041; 0043; 0081; 0082, (2017/08/31)
The invention discloses a preparation method of 1,3,3,4,4,5,5-heptafluorocyclopentene. The method comprises the following steps of a, under the existence of hydrogenation catalysts, 1,2-dichlorhexafluorocyclopentene and hydrogen gas take a gas phase catalytic hydrogenation reaction to obtain 1-chloro-3,3,4,4,5,5-hexafluorocyclopentene; b, under the existence of fluorination catalysts, 1-chloro-3,3,4,4,5,5-hexafluorocyclopentene and anhydrous hydrogen fluoride take a gas phase catalytic fluorine-chlorine exchange reaction to obtain a product of 1,3,3,4,4,5,5-heptafluorocyclopentene. The method provided by the invention has the advantages that the raw materials of 1,2-dichlorhexafluorocyclopentene can be easily obtained; in addition, the price is low. The zero-pollution production of the 1,3,3,4,4,5,5-heptafluorocyclopentene can be realized; the first step reaction and the second step reaction are performed through a circulation system, so that the reaction of the materials is complete; the sufficient utilization of the materials is realized, so that the pollution is greatly reduced; the zero pollution of the production is realized.
Method for preparing halogenated pentacyclic olefin by gas-phase isomerization reaction
-
Paragraph 0037; 0099; 0100, (2017/12/30)
The invention relates to a method for preparing halogenated pentacyclic olefin by gas-phase isomerization reaction. The method comprises the following steps of: by adopting the halogenated pentacyclic olefin C5HxFyClz as a material, under the existence of an isomerization catalyst, generating the gas-phase isomerization reaction to obtain isomers of the halogenated pentacyclic olefin, wherein X is an integer from 0 to 2, Y is an integer from 4 to 7, Z is an integer from 0 to 4, the sum of X and Y and Z is 8, and the isomerization catalyst is prepared by adopting at least one of lithium fluoride, potassium fluoride, sodium fluoride, rubidium fluoride or cesium fluoride as an active component and loading the active component on at least one of carriers such as aluminium fluoride, magnesium fluoride, iron fluoride, chromium fluoride and zinc fluoride. The method has the advantages that the material is easy to obtain, the isomerization catalyst is low in price, the yield of the isomer is higher, and the method is applicable to large-scale preparation of the isomers of the halogenated pentacyclic olefin by gas-phase reaction.
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.
Synthesis and Chemical Reactivity of 2-Chlorohexafluorocyclopentenylcopper Reagent
Choi, Sam-Kwon,Jeong, Yeon-Tae
, p. 1478 - 1479 (2007/10/02)
2-Chlorohexafluorocyclopentenylcopper reagent is readily produced in situ from 1-chloro-2-iodohexafluorocyclopentene under mild conditions and can be directly utilised in the synthesis of previously inaccessible substituted polyfluorocyclopentenes.
