申请人:Eastman Kodak Company
公开号:US04605697A1
公开(公告)日:1986-08-12
A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R.sup.1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido; (b) R.sup.2 is alkyl having from 1 to 18 carbon atoms, aryl, or alkylphenyl having from 7 to 12 carbon atoms; (c) R.sup.3 and R.sup.4 are independently alkyl, or aryl, or R.sup.3 and R.sup.4, taken together, form a fused carbocyclic or heterocyclic ring; (d) NHSO.sub.2 PUG represents a sulfonamido group; (e) PUG represents a photographically useful group; and (f) at least one of R.sup.1, R.sup.2, R.sup.3, or R.sup.4, or any combination thereof, provides a molecular configuration of such size or shape as to render the compound nondiffusible under alkaline processing conditions, is useful as redox releaser in photosensitive elements, photographic film units and in processes for transferring and/or retaining a photographic image in color diffusion transfer units. These elements, film units and processes produce retained color images having substantially reduced minimum densities.
一种不可扩散的磺胺基化合物,经氧化后可被碱裂解以释放一种可扩散的照相有用物质,所述不可扩散的磺胺基化合物具有以下结构式:##STR1## 其中:(a) R.sup.1是烷基、芳基磺胺基、氨基甲酰、碳酰胺、羰基、羰氧基或磺胺基;(b) R.sup.2是具有1至18个碳原子的烷基、芳基,或者具有7至12个碳原子的烷基苯基;(c) R.sup.3和R.sup.4独立地是烷基或芳基,或者R.sup.3和R.sup.4一起形成融合的碳环或杂环;(d) NHSO.sub.2 PUG代表磺胺基团;(e) PUG代表照相有用团;(f) R.sup.1、R.sup.2、R.sup.3或R.sup.4中的至少一个,或者它们的任意组合,提供了分子构型的大小或形状,使该化合物在碱性处理条件下不可扩散,可用作感光元件中的氧化还原释放剂,用于照相胶片单元和用于在彩色扩散传递单元中传递和/或保留照相图像的过程。这些元件、胶片单元和过程产生的保留的彩色图像具有明显降低的最小密度。