Pyrazolone couplers and colour photographic silver halide recording material containing them

Pyrazolone couplers and colour photographic silver halide recording material containing them

Pyrazolone colour couplers of the formula wherein X is -O-, -S- or -Se-, R1 is hydrogen, halogen, alkyl, alkoxy, alkylthio, phenyl, phenoxy, phenylthio or acyloxy; R2 is -CO-alkyl, -CONH-alkyl, -SO2-alkyl, phenyl, -CO-C6H5, -CONH-C6H5 or -SO2-C6H5, R3 is alkyl, -NH-alkyl, -NHCONH-alkyl, phenyl, -NH-...

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Bibliographische Detailangaben
Hauptverfasser: WEBB, TERENCE CHARLES, LONG, WILLIAM EDWARD
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
ELECTROGRAPHY
HETEROCYCLIC COMPOUNDS
HOLOGRAPHY
METALLURGY
ORGANIC CHEMISTRY
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
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Beschreibung
Zusammenfassung:Pyrazolone colour couplers of the formula wherein X is -O-, -S- or -Se-, R1 is hydrogen, halogen, alkyl, alkoxy, alkylthio, phenyl, phenoxy, phenylthio or acyloxy; R2 is -CO-alkyl, -CONH-alkyl, -SO2-alkyl, phenyl, -CO-C6H5, -CONH-C6H5 or -SO2-C6H5, R3 is alkyl, -NH-alkyl, -NHCONH-alkyl, phenyl, -NH-C6H5, -NHCONH-C6H5 or -NHCO-C6H5, R4 is hydrogen, alkyl or phenyl, are easy to prepare and have a good coupling activity. The dyes obtained by these couplers exhibit a good light-stability.