- Chloro- and bromo-defluorination of hexafluorobenzene and octafluorotoluene
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Halo(chloro, bromo)defluorination of perfluorobenzaene and toluene efficiently occurs under the action of appropriate alkali metal halides in the presence of hexaethylguanidinium chloride in catalytic amount. The relative efficiency of halide anions and m
- Shipilov,Zolotkova,Igumnov
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p. 1117 - 1120
(2007/10/03)
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- Synergism in catalytic halogen-exchange fluorination of 4-chloronitro- and dichlorotetrafluorobenzenes
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Synergism was studied in catalytic halogen-exchange fluorination of 4-chloronitro- and dichlorotetrafluorobenzenes. The synergistic effect in the fluorination of chloroaromatic compounds with potassium fluoride was mainly attributed to separation of the activation functions of catalysts with respect to substrate molecules.
- Shipilov,Bykova,Elokhova,Igumnov
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p. 487 - 491
(2007/10/03)
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- Catalytic and noncatalytic ammonolysis of polyfluorinated 1,3-dichlorobenzenes
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Reactions of 1,3-dichlorotetrafluorobenzene and 1,3-dichloro-2,4,6-trifluorobenzene with aqueous ammonia in the presence and in the absence of copper(I) salt lead to fluorine replacement by amino group in the para and ortho positions with respect to the chlorine atom. Ammonolysis of the resulting chloropolyfluoroanilines in the absence of a catalyst involves replacement of fluorine atom in the meta position with respect to the amino group. In the presence of copper(I) salt, catalytic aminodechlorination occurs at the para and ortho positions with respect to the amino group introduced in the first stage.
- Selivanova,Pokrovskii,Shteingarts
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p. 1023 - 1029
(2007/10/03)
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