Photographic element containing a high-dye-yield coupler for producing a yellow hue
    4.
    发明授权
    Photographic element containing a high-dye-yield coupler for producing a yellow hue 失效
    含有用于产生黄色调的高染料收率成色剂的摄影元件

    公开(公告)号:US06569612B1

    公开(公告)日:2003-05-27

    申请号:US09943073

    申请日:2001-08-30

    IPC分类号: G03C146

    摘要: A color photographic element is disclosed comprising at least three light-sensitive units which have their individual sensitivities in different wavelength regions, comprising at least one imaging layer comprising a light-sensitive silver-halide emulsion, binder, and a yellow coupler represented by the following structure: Wherein COUP is a photographic coupler residue capable of coupling with oxidized color developer to form a first yellow dye L is a linking group selected from the group consisting of —OC(═O)—, —OC(═S)—, —SC(═O)—, and —SC(═S)—, and —DYE is a releasable second yellow dye or yellow dye precursor, wherein COUP is an acetanilide compound that contains one or more electron-withdrawing groups such that the pKa at the coupling site is less than 8.7. Such yellow couplers improve activity and enhance dye densities.

    摘要翻译: 公开了一种彩色照相元件,其包括至少三个在不同波长区域具有各自敏感度的光敏单元,其包含至少一个成像层,该成像层包含感光卤化银乳剂,粘合剂和由以下物质表示的黄色成色剂 结构:其中COUP是能够与氧化的显色剂偶联以形成第一黄色染料的照相成色剂残基L是选自-OC(= O) - , - OC(= S) - , - SC(= O) - 和-SSC(= S) - ,-DYE是可释放的第二黄色染料或黄色染料前体,其中COUP是含有一个或多个吸电子基团的乙酰苯胺化合物,使得pKa在 偶联位点小于8.7。 这种黄色成色剂提高了活性并提高了染料密度。

    Synthesis of unsymmetric anthracene compounds
    6.
    发明申请
    Synthesis of unsymmetric anthracene compounds 审中-公开
    不对称蒽化合物的合成

    公开(公告)号:US20050245752A1

    公开(公告)日:2005-11-03

    申请号:US10834826

    申请日:2004-04-29

    摘要: A process for forming an unsymmetric anthracene compound comprises a first step of forming a 9-perfluoroalkylsulfonate derivative of anthrone by reacting the anthrone with a perfluoroalkyl sulfonating agent, followed by a second step of contacting the reaction product with an aryl or heteroaryl boronic acid, ester or anhydride, and a palladium catalyst for a period of time sufficient to form an unsymmetric anthracene compound having at least one 9-position aromatic substituent.

    摘要翻译: 形成不对称蒽化合物的方法包括通过使蒽酮与全氟烷基磺酸化剂反应形成蒽酮的9-全氟烷基磺酸酯衍生物的第一步骤,然后使反应产物与芳基或杂芳基硼酸酯反应 或酸酐和钯催化剂,其时间足以形成具有至少一个9-位芳族取代基的不对称蒽化合物。