Substituted triazolopyrimidines and their use in light-sensitive

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430615, 430264, 430949, G03C 134

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active

047270179

ABSTRACT:
Photographic element comprising a support and a silver halide emulsion layer comprising in said emulsion layer and/or in a water-permeable layer coated at the same side of the support as said emulsion layer a compound corresponding to the following general formula: ##STR1## wherein: each of R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, can represent hydrogen, C.sub.1 -C.sub.8 alkyl, or Alk.sub.1 - X - Alk.sub.2 - Y -, wherein: Alk.sub.1 is C.sub.1 -C.sub.8 alkyl, which may be substituted, X is --O-- or --S--, Alk.sub.2 is C.sub.1 -C.sub.8 alkylene, which may be substituted, and Y is a single bond, --O--, --S--, --CONH--, --SO.sub.2 NH--, or --NHCONH--, R.sup.3 can alternatively represent C.sub.1 -C.sub.8 alkyl-thio, the C.sub.1 -C.sub.8 alkyl group of which can be substituted, at least one of R.sup.1, R.sup.2, and R.sup.3, however, being other than hydrogen and other than C.sub.1 -C.sub.8 alkyl.
The invention disclosed includes compounds per se, which correspond to said general formula.

REFERENCES:
patent: 4542094 (1985-09-01), Koshizuka et al.

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