Intermediates for making 14-crown-4-ether derivatives
    3.
    发明授权
    Intermediates for making 14-crown-4-ether derivatives 失效
    制备14-crown-4-ether衍生物的中间体

    公开(公告)号:US5132436A

    公开(公告)日:1992-07-21

    申请号:US706431

    申请日:1991-05-28

    IPC分类号: C07D323/00

    CPC分类号: C07D323/00

    摘要: Intermediate compounds for the preparation of useful 14-crown-4-ether derivatives are presented. The intermediates have the structure: ##STR1## wherein R represents CH.sub.3, n-C.sub.12 H.sub.25 and CH.sub.2 C.sub.6 H.sub.5 ; and R.sub.2 represents CH.sub.3, and n-C.sub.7 H.sub.15.

    摘要翻译: 介绍了制备有用的14-冠醚-4-醚衍生物的中间体化合物。 中间体具有以下结构:(化合物7)其中R表示CH 3,n-C 12 H 25和CH 2 C 6 H 5; 并且R 2表示CH 3和n-C 7 H 15。

    Acid-resistant copolymer and photographic element incorporating same
    4.
    发明授权
    Acid-resistant copolymer and photographic element incorporating same 失效
    耐酸共聚物和含有它的照相元件

    公开(公告)号:US4152159A

    公开(公告)日:1979-05-01

    申请号:US892597

    申请日:1978-04-03

    IPC分类号: G03F7/038 G03C1/68

    CPC分类号: G03F7/0388

    摘要: A photocrosslinkable polymer and imaging element containing said polymer are described wherein acid resistance is achieved by vinyl ester recurring units. A process for etching an element so prepared features exposure, development, and etching in an acid bath.

    摘要翻译: 描述了含有所述聚合物的光致交联聚合物和成像元件,其中耐酸性通过乙烯基酯重复单元实现。 用于蚀刻如此制备的元件的方法具有在酸浴中的曝光,显影和蚀刻。