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AssigneeCiba-Geigy Corporation
InventorsRainer Kitzing, Brian R. D. Whitear, William E. Long, David L. R. Reeves, Glenn P. Wood
Estimating the term…
Novel azo compounds and their preparation are provided. These compounds have the general formula ##STR1## wherein X is N or CR.sub.4 where R.sub.4 is a hydrogen atom or an optionally substituted alkyl or aryl group, Y is S.sup..sym., N.sup..sym. R.sub.5, O.sup..sym. or N where R.sub.5 is an optionally substituted alkyl or aryl group, R.sub.1 is an optionally substituted alkyl or aryl group, R.sub.1 is a substituted aromatic or heterocyclic group containing a ballasting group, R.sub.2 and R.sub.3 are each hydrogen or alkyl groups having 1 to 4 carbon atoms, or R.sub.2 and R.sub.3 together with the nitrogen atom complete a heterocyclic ring, or one of R.sub.2 or R.sub.3 can be hydrogen and the other of R.sub.2 or R.sub.3 can be aryl. There may be further substitution in either of the benz rings and these rings may be benzannelated. These azo compounds are useful in the photographic field especially in the photographic dye diffusion transfer process for the production of photographic images.
An azo dye of the general formula ##STR23## where X is N or CR.sub.4 where R.sub.4 is a hydrogen atom, alkyl having 1 to 4 carbon atoms, phenyl, phenyl substituted by carboxyl, alkyl having 1 to 4 carbon atoms, hydroxy or halogen, Y is S.sup.+, N.sup.+ R.sub.5, O.sup.+ or N where R.sub.5 is alkyl having 1 to 4 carbon atoms, phenyl, phenyl substituted by alkyl having 1 to 4 carbon atoms, halogen, hydroxy or carboxyl, R.sub.1 is a group of the formula ##STR24## wherein R.sub.6 is a group of the formula ##STR25## R.sub.2 and R.sub.3 are each hydrogen atoms or alkyl groups having 1 to 4 carbon atoms, or R.sub.2 and R.sub.3 together with the nitrogen atom complete a 5- or 6-membered heterocyclic ring, or one of R.sub.2 and R.sub.3 can be hydrogen and the other of R.sub.2 and R.sub.3 can be phenyl, and T.sub.1 and T.sub.2 represent hydrogen atoms, alkyl having 1 to 4 carbon atoms, amino groups, halogen or form a benzannelated ring.
Dependencies are inferred from the claim text.