Photographic elements containing certain yellow dye-forming coup

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...

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430556, G03C 732

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active

056934580

ABSTRACT:
The invention provides a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a dye-forming coupler of formula (I): ##STR1## wherein X is H or a coupling-off group, R.sub.1 is H or a substituent group; Y and Z are the same or different and are H or are independently selected from alkyl, aryl and heteroaryl groups; provided that Y and Z taken together with the nitrogen atom may form a 5-10 membered heterocyclic ring.

REFERENCES:
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Synthesis, 1993, Stuttgart, DE, pp. 783-785, R. Bossio et al. "Studies on Isocyanides and Related Compounds".
Journal of General Chemistry USSR, vol. 30, No. 10, Oct. 1960, NY US N.S. Vulf'son and V.E. Kolchin.
Journal of Medicinal Chemistry, vol. 36, 1993, Washington US, pp. 3386-3396, M. Rowley et al.

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