Production of dioxazine compound

Dioxazine compounds of the formula (I) which are useful for dyes or pigments are prepared by heating a compound of formula (II) in the presence of inorganic acid with or without an oxidizing agent in an inert organic solvent: wherein R is a C1-4 alkyl group, and each of X₁ and X₂ is a hydrogen atom...

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Bibliographische Detailangaben
Hauptverfasser:	FUJITA, TAIRA, KAYANE, YUTAKA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMISTRY DYES HETEROCYCLIC COMPOUNDS LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES
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Beschreibung
Zusammenfassung:	Dioxazine compounds of the formula (I) which are useful for dyes or pigments are prepared by heating a compound of formula (II) in the presence of inorganic acid with or without an oxidizing agent in an inert organic solvent: wherein R is a C1-4 alkyl group, and each of X₁ and X₂ is a hydrogen atom or a chlorine atom.