Azo compounds useful in a photographic dye diffusion transfer pr

Details Azo compounds useful in a photographic dye diffusion transfer pr Azo compounds useful in a photographic dye diffusion transfer pr

1979-02-23

1981-08-25

Doll, John

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

96 3, 96 22, 96 29R, 96 90R, 260154, 260155, 260156, 260157, 260159, C09B 2906, C09B 2908, C09B 2924, C09B 2936

Patent

active

042858593

ABSTRACT:
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.

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patent: 4016151 (1977-04-01), Lotsch
patent: 4072672 (1978-02-01), Henzi

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