Process for the preparation of benzimidazolylbenzofuranes

Process for the preparation of benzimidazolylbenzofuranes

Optical brighteners of the formula wherein the radicals R1 to R9 are substituents customary in brightener chemistry, A(-) denotes a colorless anion, w denotes the valency of the anion A and n denotes 0 or 1, are obtained in a simple manner when a compound of the formula is heated to 110 DEG -200 DEG...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WEHLING, BERNHARD, BREMEN, JOSEF
Format: Patent
Sprache:eng
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:Optical brighteners of the formula wherein the radicals R1 to R9 are substituents customary in brightener chemistry, A(-) denotes a colorless anion, w denotes the valency of the anion A and n denotes 0 or 1, are obtained in a simple manner when a compound of the formula is heated to 110 DEG -200 DEG C. in an inert solvent, without the addition of a catalyst.