VERFAHREN ZUR HERSTELLUNG VON (PFEIL HOCH)(DELTA)(PFEIL HOCH)(PFEIL HOCH)4(PFEIL HOCH)-1,3,4-OXADIAZOLIN-(2)-ON VERBINDUNGEN

VERFAHREN ZUR HERSTELLUNG VON (PFEIL HOCH)(DELTA)(PFEIL HOCH)(PFEIL HOCH)4(PFEIL HOCH)-1,3,4-OXADIAZOLIN-(2)-ON VERBINDUNGEN

Optical brighteners of the formula (I) wherein Y denotes a carbocyclic or heterocyclic radical, R denotes hydrogen or R1, wherein R1 is an optionally substituted alkyl, aralkyl or aryl radical, and n denotes 0 or 1 and the rings A and B can carry further substituents, are obtained in a simple manner...

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Bibliographische Detailangaben
1. Verfasser: ECKSTEIN,UDO,DR
Format: Patent
Sprache: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:Optical brighteners of the formula (I) wherein Y denotes a carbocyclic or heterocyclic radical, R denotes hydrogen or R1, wherein R1 is an optionally substituted alkyl, aralkyl or aryl radical, and n denotes 0 or 1 and the rings A and B can carry further substituents, are obtained in a simple manner by a process in which compounds of the formula (V) are rearranged at elevated temperatures-if appropriate in the presence of acids.