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    • 2. 发明授权
    • Photographic element containing a coupler capable of releasing a
photographically useful group
    • 含有能够释放摄影有用组的耦合器的照相元件
    • US5686234A
    • 1997-11-11
    • US590661
    • 1996-01-24
    • William James BegleyTeh Hsuan ChenDonald Singleton, Jr.Frank Dino Coms
    • William James BegleyTeh Hsuan ChenDonald Singleton, Jr.Frank Dino Coms
    • C07D403/12G03C7/305G03C7/40
    • C07D403/12G03C7/30576G03C2200/33Y10S430/156Y10S430/157Y10S430/158Y10S430/159Y10S430/16
    • A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula COUP--T.sup.1 --T.sup.2 --(T.sup.3).sub.b --PUG wherein COUP is a coupler moiety having a coupling site to which T.sup.1 is attached; T.sup.1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release T.sup.2, T.sup.2 being an indazole timing or linking group which, after release from T.sup.1, functions by electron transfer down a conjugated chain to release T.sup.3 or PUG, and which is represented by the formula: ##STR1## wherein ** denotes the point of attachment to T.sup.1 and *** denotes the point of attachment to T.sup.3 or PUG; R.sup.1 and R.sup.2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; V is independently selected from the group consisting of an alkyl, carbocyclic, heterocyclic, halo, carbamoyl, sulfamoyl, carbonamido, sulfonamido, keto, sulfo, nitro, hydroxyl, carboxyl, amino, alkoxy, alkoxycarbonyl, aryloxy, or arylthio group; q is 0, 1, 2, 3 or 4; T.sup.3 is a timing or linking group attached to T.sup.2 which is released therefrom after T.sup.2 releases from T.sup.1, and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release PUG; b is 0 or 1; and PUG is a photographically useful group.
    • 一种照相元件,包括一个载体,其上至少有一个卤化银乳剂层,该层含有由COUP-T1-T2-(T3)代表的COUP-T1-T2-(T3)b-PUG的照相成色剂,其中COUP是具有偶合位点的成色剂部分, T1连接; T1是在加工期间从COUP释放的定时或连接基团,并且通过电子转移通过共轭或非共轭链或通过亲核取代反应进行功能释放T2,T2是吲唑定时或连接基团,其在从T1释放后 通过电子转移共轭链释放T3或PUG起作用,其由下式表示:其中**表示与T1的连接点,***表示与T3或PUG的连接点; R 1和R 2独立地选自氢或脂族,碳环或杂环基,或可以键合在一起形成5,6或7元环; 卤素,氨基甲酰基,氨基磺酰基,碳酰氨基,亚磺酰氨基,酮基,磺基,硝基,羟基,羧基,氨基,烷氧基,烷氧基羰基,芳氧基或芳硫基。 q是0,1,2,3或4; T3是连接T2的定时或连接基团,其在T2从T2释放后从其释放,并且通过电子转移通过共轭或非共轭链或通过亲核置换反应起作用以释放PUG; b为0或1; PUG是一个摄影有用的小组。