Benzoic 2,3,4,5,6-pentafluoro

Hence, in highly acidic media, fluorine may act as a very powerful and selective electrophile and, by this method, 2,4-difluorobenzoic acid, which is highly deactivated towards electrophilic attack, can be fluorinated in concentrated sulphuric acid to such an extent that 2,3,4,5-tetrafluoro- and even small amounts of pentafluoro-benzoic acid are produced [146,147]. 

W. Janowski, M. Gdaniec, T. Polonski, The 2 1 cocrystal of benzamide and pentafluoro-benzoic acid, Acta Cryst. C62 (2006) o492-o494. 

Benzoic, oleic linoleic and undecanoic acids Chloroform — Electron capture Acids converted to pentafluoro benzyl esters [225, 226]... 

F5SOOSF5 is difficult, after the initial publication in 1962 this chemistry has, unfortunately, not been explored further. Physicochemical studies on p-pentafluoro-sulfuranyloxybenzoic acid (p/Q = 5.04 for comparison, benzoic acid 5.68, p-nitro-benzoic acid 4.55) show the p-OSFj group has a relatively large ffp , , value of +0.44 (for comparison, p-F +0.062, p-COOEt +0.45), indicating a strong inductive electron-withdrawing (-/) effect. 

The reductive carbonylation of iodobenzene with triiron dodecacarbonyl in toluene gives benzophenone (Rhee et al., 1967). Reaction of pentafluoro-phenyl iodide and nickel carbonyl in dimethylformamide or toluene gives perfiuorobenzophenone and perfluorobiphenyl (Beckert and Lowe, 1967). Iodobenzene reacts with nickel carbonyl to give benzoic acid esters (in alcohols) or benzil (in tetrahydrofuran) (Bauld, 1963), possibly via a benzoyl-nickel intermediate. Reaction of this intermediate with enamines affords /f-diketones in high yields (Seki et al, 1975). 

C10H7F5O2 benzoic acid 2,2,3,3,3-pentafluoro-propyl ester 67103-70-2... 

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