发明授权
US4357412A Photographic products and processes employing novel nondiffusible bridged azoaminophenol magenta dye-releasing compounds and precursors thereof 失效
使用新型不扩散桥联偶氮氨基苯酚洋红色染料释放化合物及其前体的摄影产品和方法

Photographic products and processes employing novel nondiffusible
bridged azoaminophenol magenta dye-releasing compounds and precursors
thereof
摘要:
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable, bridged, azoaminophenol magenta dye moiety or precursor thereof having the formula: ##STR1## wherein: (a) R represents hydrogen, a hydrolyzable moiety or CAR;(b) R.sup.1 represents hydrogen;(c) R.sup.2 represents an alkyl group of 1 to about 6 carbon atoms or CAR; or R.sup.1 and R.sup.2 represent an alkylene group which can be taken together with the atoms to which they are attached to complete a 5- or 6-membered heterocyclic ring;(d) R.sup.3 represents an alkyl group of 1 to about 6 carbon atoms or CAR;(e) R.sup.4 represents hydrogen; or R.sup.3 and R.sup.4 represent an alkylene group which can be taken together with the atoms to which they are attached to complete a 5- or 6-membered heterocyclic ring;with the proviso that at least one of the 5- or 6-membered heterocyclic rings of (c) or (e) is present in the compound;(f) CAR represents a ballasted carrier moiety capable of releasing the diffusible magenta dye moiety or precursor thereof under alkaline conditions; and(g) n is 0, 1 or 2, with the proviso that when n is 0, then at least one of R, R.sup.2 or R.sup.3 is CAR.
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