Preparation of pyrazolo[5,1-b]quinazolones
    115.
    发明授权
    Preparation of pyrazolo[5,1-b]quinazolones 失效
    吡唑并[5,1-b]喹唑啉酮的制备

    公开(公告)号:US5028705A

    公开(公告)日:1991-07-02

    申请号:US242118

    申请日:1988-09-09

    IPC分类号: C07D265/26 C07D487/04

    CPC分类号: C07D487/04

    摘要: Pyrazolo[5,1-b]quinazolones are prepared by reacting isatoic anhydrides with pyrazolones at from 100.degree. to 180.degree. C. in an inert organic solvent with simultaneous azeotropic removal of the water formed in the course of the reaction.

    摘要翻译: 吡唑并[5,1-b]喹唑啉酮通过在惰性有机溶剂中使乙酸酐与吡唑啉酮在100-180℃下反应制备,同时共沸除去反应过程中形成的水​​。

    Preparation of pyrazolo(5,1-B)quinazolones
    117.
    发明授权
    Preparation of pyrazolo(5,1-B)quinazolones 失效
    吡唑并(5,1-B)喹唑啉酮的制备

    公开(公告)号:US4925946A

    公开(公告)日:1990-05-15

    申请号:US242132

    申请日:1988-09-09

    IPC分类号: C07D265/26 C07D487/04

    CPC分类号: C07D487/04

    摘要: Pyrazolo[5,1-b]quinazolones are prepared by reacting isatoic anhydrides with 3-methylpyrazol-5-one in water as reaction medium at from 40.degree. to 150.degree. C. under from 1 to 5 bar.

    摘要翻译: 吡唑并[5,1-b]喹唑啉酮通过在水中作为反应介质,在1-50巴下,在40-150℃下,使水杨酸酐与3-甲基吡唑-5-酮反应制备。

    Preparation of haloisatoic anhydrides
    118.
    发明授权
    Preparation of haloisatoic anhydrides 失效
    卤代酸酐的制备

    公开(公告)号:US4897478A

    公开(公告)日:1990-01-30

    申请号:US239654

    申请日:1988-09-02

    CPC分类号: C07D265/26

    摘要: Haloisatoic anhydrides are prepared by halogenating appropriately unsubstituted isatoic anhydrides with elemental chlorine or bromine in the presence of chlorosulfonic acid at from -10.degree. C. to +100.degree. C. using not less than 0.5 mole of halogen per mole of isatoic anhydride.

    摘要翻译: 卤代酸酐通过在-10℃至+ 100℃的氯磺酸存在下用元素氯或溴卤化适当的未取代的烷基酸酐而制备,使用不少于0.5摩尔的卤素/每摩尔的无水醋酸酐。