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Perfluoroalkylcopper compounds

Some perfluoroalkylcopper compounds were preeipitated from... [Pg.230]

Perfluoroalkylcopper and perfluoroarylcopper compounds are noticeably more thermally stable than the corresponding alkyl and aryl compounds. Solutions of perfluoroalkylcopper compounds in DMSO or DMF are stable up to at least 120°C 200), whereas ether suspensions of alkylcopper compounds decompose at 0°C or below. Similarly, pure pentafluorophenylcopper tetramer decomposes at 210°C-220°C, and a sample has been kept in a Dry Ice chest for 5 years 32). However pure phenylcopper can be kept for no more than a few days, even under nitrogen 73). Solutions of pentafluorophenylcopper reagents containing metal halides in THF have been refluxed for 5 days or more without decomposition (97, 144). Other stable perhaloarylcopper reagents are those in which the aryl moiety is perfluoro(p-phenoxyphenyl) (96), pentachlorophenyl, and 2,3,5,6-tetrachloropyridyl 144), none of which... [Pg.243]

The reaction of perfluoroalkylcopper compounds, prepared in situ from the perfluoroalkyl iodide and copper, with ip -hybridized organic halides [Eq. (73)] in refluxing pyridine utilizes the thermal stability of the intermediate copper compounds and their failure to react with sp -hybridized halides (29, 30). [Pg.269]

Perfluoroalkylcopper compounds, prepared from RfI and copper bronze in DMSO, gave low yields of olefins with terminal acetylenes (equation 5), and C7Fi5CH C CHs was produced with CH C CHsBr.i Alkynyl halides are also replaced by the Rr... [Pg.353]

Perfluoroalkylcopper compounds, derived from perfluoroalkyl halides and copper in dipolar aprotic solvents such as dimethyl sulfoxide and N,N-dimethylacetamide, are rather stable. These complexes couple effectively with aryl and vinyl halides (Burdon et al., 1967, 1972a McLoughlin and Thrower, 1969). [Pg.108]

Table 6, Perfluoroalkyl Aromatic Compounds Prepared via the Reaction of Perfluoroalkylcopper Reagents with lodo-or Bromoaromatic Compounds... Table 6, Perfluoroalkyl Aromatic Compounds Prepared via the Reaction of Perfluoroalkylcopper Reagents with lodo-or Bromoaromatic Compounds...
A possible route to secondary perfluoroalkylcopper reagents may be a reaction between a copper(I) halide and a secondary perfluoroalkylsilver compound. The latter are easily prepared by the addition of silver fluoride to a perfluoroolefin in acetonitrile at 25°C 202) [Eq. (26)]. [Pg.227]

Chen, G.J. Tamborski, C. Polyfluoroalkylation of bromoheterocyclic compounds via perfluoroalkylcopper intermediates. J. Fluorine Chem. 1990, 46 V), 137-159. [Pg.299]

Perfluoroalkylcopper reagents have received more attention than perhaps any other perfluorinated organometallic compounds. They can be prepared from per-fluoroalkyl iodides and copper metal in polar solvents (such as DMSO, DMS,... [Pg.381]


See other pages where Perfluoroalkylcopper compounds is mentioned: [Pg.706]    [Pg.706]    [Pg.215]    [Pg.226]    [Pg.226]    [Pg.245]    [Pg.245]    [Pg.344]    [Pg.706]    [Pg.706]    [Pg.215]    [Pg.226]    [Pg.226]    [Pg.245]    [Pg.245]    [Pg.344]    [Pg.699]    [Pg.699]    [Pg.1279]    [Pg.273]    [Pg.699]    [Pg.63]   
See also in sourсe #XX -- [ Pg.108 ]




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Perfluoroalkylcopper

Perfluoroalkylcopper compounds, reactions

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