MANUFACTURE OF HALOGENOISATIC ACID ANHYDRIDE

Haloisatoic anhydrides are prepared by halogenating appropriately unsubstituted isatoic anhydrides with elemental chlorine or bromine in the presence of chlorosulfonic acid at from -10 DEG C. to +100 DEG C. using not less than 0.5 mole of halogen per mole of isatoic anhydride.

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Bibliographische Detailangaben
Hauptverfasser: BURUKUHARUTO ORUTO, HAINRITSUHI KOBUARUSHIYU, HARUTOMUUTO KANTAA
Format: Patent
Sprache:eng
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Zusammenfassung:Haloisatoic anhydrides are prepared by halogenating appropriately unsubstituted isatoic anhydrides with elemental chlorine or bromine in the presence of chlorosulfonic acid at from -10 DEG C. to +100 DEG C. using not less than 0.5 mole of halogen per mole of isatoic anhydride.