Method of preparing phosphodiesterase IV inhibitors
    2.
    发明授权
    Method of preparing phosphodiesterase IV inhibitors 失效
    制备磷酸二酯酶IV抑制剂的方法

    公开(公告)号:US5856498A

    公开(公告)日:1999-01-05

    申请号:US931155

    申请日:1997-09-16

    CPC分类号: C07D213/16 C07D213/30

    摘要: This invention is concerned with a novel process for the preparation of a compound of structural formula I ##STR1## wherein R.sup.1 and R.sup.2 independently are aryl, C.sub.2-15 alkenyl or C.sub.1-15 alkyl, either unsubstituted or substituted with one or three substituents, which can be the same or different, selected from the group consisting of R.sup.a, wherein R.sup.a belongs to a group consisting of C.sub.1-6 alkyl, aryl, halo, --N(R.sup.3).sub.2, --NO.sub.2, --CN, --OR.sup.3, --C.sub.3-6 cycloalkoxy, --CO(R.sup.3), --COOR.sup.3, SO.sub.2 R.sup.3 and --SR.sup.3 ; wherein R3 is selected from the group consisting of hydrogen, C.sub.1-6 alkyl, C.sub.2-6 alkenyl and aryl, said alkyl, alkenyl or aryl optionally substituted with 1 to 3 groups of R.sup.a, which is an important antiasthmatic agent.

    摘要翻译: 本发明涉及一种制备结构式Ⅰ化合物的新方法,其中R 1和R 2独立地是未被取代或被一个或三个取代基取代的芳基,C 2-15烯基或C 1-15烷基, 其可以相同或不同,选自Ra,其中Ra属于由C 1-6烷基,芳基,卤素,-N(R 3)2,-NO 2,-CN,-OR 3, C 3-6环烷氧基,-CO(R 3),-COOR 3,SO 2 R 3和-SR 3; 其中R 3选自氢,C 1-6烷基,C 2-6烯基和芳基,所述烷基,链烯基或芳基任选被1-3个R a基团取代,其是重要的抗哮喘药。