US 4,362,878 A · Substituted 1,2,4-triazoles as DIR compounds and their use in photographic materials

Abstract

Development inhibitor releasing compounds of the formula: ##STR1## are provided wherein R.sub.1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R.sub.1 may form an annelated ring, R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sub.3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR.sub.4, --COR.sub.4, ##STR2## or --OR.sub.4 where R.sub.4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated. The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.

Claims7

Dependent claims

A compound of the general formula:

##STR27## wherein:
R.sub.1 is hydrogen, hydroxy, halogen or alkoxy of 6 to 18 carbon atoms, and n is 1 or 2,
R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms,
R.sub.3 is alkyl of 4 to 12 carbon atoms and
Y is hydrogen, halogen, phenyl or a 1, 2, 4-triazole, benzimidazole, tetrazole, urazole, pyrazole, phthalimido or succinimido group, substituted by alkyl of one to four carbon atoms, alkylmercapto of 1 to 8 carbon atoms, nitro, phenyl and/or benzyl.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

06/158,979Filed 12 Jun 1980 · division

Priority

GB 37260/7818 Sep 1978

Granted

7 Dec 1982

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G03C 7/305
Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials: substances liberating…
C07C 45/63
By reactions not involving the formation of >C = O groups: by introduction of halogen; by substitution of halogen atoms by other halogen atoms
C07C 45/71
By reaction with functional groups containing oxygen only in singly bound form: being hydroxy groups
C07D 249/12
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…

Substituted 1,2,4-triazoles as DIR compounds and their use in photographic materials

Life of this patent

Substituted 1,2,4-triazoles as DIR compounds and their use in photographic materials

Life of this patent

Abstract

Claims7