申请人:KODAK LIMITED
公开号:EP0751427A1
公开(公告)日:1997-01-02
The present invention comprehends the use of thenoylacetamide materials as image-dye-forming couplers, specifically yellow dye-forming couplers, for use with silver halide based photographic systems. In one aspect, the invention provides a coupler of formula (I):-
wherein X is H or a coupling-off group, R1 is H or is a coupler-modifying functional group; Y and Z are the same or different and are H or independently selected from alkyl, aryl or heteroaryl, each of which is unsubstituted or substituted with one or more coupler-modifying functional groups; or Y and Z taken together with the nitrogen atom form a 5-10 membered heterocyclic ring which may contain one or more further heteroatoms selected from N, O and S, said heterocyclic ring being unsubstituted or substituted with one or more coupler-modifying functional groups.
Preferred couplers are those where Y is H and Z is a phenyl group, which may be mono- or di-substituted.
本发明包括使用酰乙酰胺材料作为图像染料形成耦合剂,特别是黄色染料形成耦合剂,用于卤化银基摄影系统。在一个方面,本发明提供了式 (I) 的偶联剂:- X 是 H 或偶联剂。
其中 X 是 H 或耦合关闭基团,R1 是 H 或耦合剂修饰官能团;Y 和 Z 是相同或不同的,并且是 H 或独立选自烷基、芳基或杂芳基,其中每个都未被取代或被一个或多个耦合剂修饰官能团取代;或 Y 和 Z 与氮原子一起形成一个 5-10 个成员的杂环,该杂环可包含一个或多个选自 N、O 和 S 的杂原子,所述杂环未被取代或被一个或多个耦合剂修饰官能团取代。
优选的耦合剂是 Y 为 H、Z 为苯基(可以是单取代或二取代)的耦合剂。