Preparation of fluorophthalic anhydrides

Fluorophthalic anhydrides containing 1 or 2 fluorine atoms are prepared by a process in which a chlorophthalic anhydride containing 1 or 2 chlorine atoms is treated with an acid chloride of sulfurous acid or of carbonic acid in the presence of an aliphatic sulfone, and the reaction mixture is then r...

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Hauptverfasser: VARWIG, JUERGEN, HAMPRECHT, GERHARD, ROHR, WOLFGANG
Format: Patent
Sprache:eng
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Zusammenfassung:Fluorophthalic anhydrides containing 1 or 2 fluorine atoms are prepared by a process in which a chlorophthalic anhydride containing 1 or 2 chlorine atoms is treated with an acid chloride of sulfurous acid or of carbonic acid in the presence of an aliphatic sulfone, and the reaction mixture is then reacted with potassium fluoride.