- PROCESSES FOR THE SYNTHESIS OF 2-CHLORO-1,1,1,3,3,4,4,4-HEPTAFLUORO-2-BUTENE AND HEXAFLUORO-2-BUTYNE
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Disclosed is a process comprising reacting CF3CCl2CF2CF3 (CFC-318ma) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CCl=CFCF3(CFC-1317mx). Also disclosed is a process comprising reacting CF3CCl═CFCF3 (CFC-1317mx) with hydrogen in the presence of a dehalogenation catalyst to produce CF3C≡CCF3 (hexafluoro-2-butyne). Hexafluoro-2-butyne can be used to produce CF3CH═CHCF2CF3 (1,1,1,4,4,5,5,5-octafluoro-2-pentene).
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Page/Page column 5
(2009/07/03)
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- 3-CHLORO- AND 3-BROMOHEPTAFLUORO-1-BUTENES. SYNTHESIS AND CATALYTIC REARRANGEMENTS
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3-Chloroheptafluoro-1-butenes and 3-bromoheptafluoro-1-butenes were obtained by dehydrohalogenation of 1-hydro-2,3-dichloro- and 1-hydro-2,3-dibromo-heptafluorobutenes.It was shown that the rearrangement of 3-bromoheptafluoro-1-butene, catalyzed by antimony pentafluoride, is accompanied by migration of the bromine atom and leads to 1-bromoheptafluoro-2-butene.Under analogous conditions 3-chloroheptafluoro-1-butene isomerizes to 2-chloroheptafluoro-2-butene.
- Filyakova, T. I.,Zapevalov, A. Ya.
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p. 1605 - 1609
(2007/10/02)
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