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US 4,237,281 AGranted
Dyestuffs containing amino or imino groups
AssigneeCiba-Geigy Corporation
InventorWilliam E. Long
Life of this patent
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AssigneeCiba-Geigy Corporation
InventorWilliam E. Long
Estimating the term…
Novel dyestuffs containing amino or imino groups and their preparation are provided. These dyestuffs have the general formula ##STR1## wherein R is --N(R.sub.3)CH.sub.2 --Z or --N.dbd.CH--Z, X is N or CR.sub.6 where R.sub.6 is a hydrogen atom or an optionally substituted alkyl or aryl group, Y is S.sup..sym., O.sup..sym., N or N.sup..sym. R.sub.7 where R.sub.7 is a hydrogen atom or an optionally substituted alkyl or aryl group, R.sub.1, R.sub.1 and R.sub.2 each represent a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, or R.sub.1 and R.sub.2 together with the nitrogen atom complete a heterocyclic ring, or one of R.sub.1 and R.sub.2 can be hydrogen and the other of R.sub.1 and R.sub.2 can be aryl, Z is a group which comprises both an activating group which contains at least one double bond system and also a ballasting group and R.sub.4 and R.sub.5 each represent optional substituents or form an annelated benzene ring. The new dyestuffs are useful in the photographic field especially in the photographic dye diffusion transfer process for the production of photographic images.
A compound of the general formula ##STR20## or of the general formula ##STR21## wherein X is N, Y is S.sup..sym., O.sup..sym., N or N.sup..sym. R.sub.7 where R.sub.7 is hydrogen, alkyl of 1 to 4 carbon atoms, phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, halogen, hydroxy or carbonyl, R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, or R.sub.1 and R.sub.2 together with the nitrogen atom complete a heterocyclic 5- or 6-membered ring, or one of R.sub.1 and R.sub.2 can be hydrogen and the other of R.sub.1 and R.sub.2 can be phenyl, Z is a member selected from the group of the formulae ##STR22## wherein R.sub.8 comprises a ballasting group of at least 10 carbon atoms, and R.sub.4 and R.sub.5 each represent alkyl of 1 to 4 carbon atoms, amino or halogen or form an annelated benzene ring.
Dependencies are inferred from the claim text.