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- W2105876278 abstract "Synthesis of Aromatic Fluoro Compounds by Nucleophilic Exchange of Nitro Groups by Fluoride The synthesis of aromatic fluoro compounds from the respective nitro compounds by nucleophilic substitution of nitrite by fluoride is described. Reasonable yields in case of nonactivated nitro compounds are only obtained if the nitrite formed in the reaction is eliminated by acylation. 1-Fluoro-3-nitrobenzene (2) was obtained from 1,3-dinitrobenzene (1), and 1-fluoro-3,5-dinitrobenzene (9) as well as 1,3-difluoro-5-nitrobenzene (10) from 1,3,5-trinitrobenzene (8) in yields up to 92% by reaction of nitro compounds with potassium fluoride in sulfolane at 180 – 200°C in the presence of phthaloyl dichloride (6); 1,2-difluoro-4-nitrobenzene (12) was formed in 58% yield from 2,4-dinitro-1-fluorobenzene (11) in the presence of pyromellitoyl tetrachloride (13)." @default.
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- W2105876278 date "1991-01-01" @default.
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- W2105876278 title "Darstellung aromatischer Fluor‐Verbindungen durch nucleophilen Austausch von Nitro‐Gruppen gegen Fluorid" @default.
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- W2105876278 doi "https://doi.org/10.1002/cber.19911240124" @default.
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