Anthelmintic pyridinyl acylhydrazones
    2.
    发明授权
    Anthelmintic pyridinyl acylhydrazones 失效
    驱虫剂吡啶基酰腙

    公开(公告)号:US5023334A

    公开(公告)日:1991-06-11

    申请号:US402385

    申请日:1989-09-01

    摘要: This invention concerns a process for killing internal parasites, especially nematodes and cestodes affecting warm blooded animals such as sheep, cattle, swine, goats, dogs, cats, horses and humans as well as poultry by administering an effective amount of a compound of the Formula I: ##STR1## Certain of the compounds of Formula I are novel and in further embodiments of the invention provide novel compounds and compositions for use in the process of the invention. The compounds are readily prepared by conventional chemical reactions. Various pyridinyl acylhydrazones of Formula I demonstrate broad-spectrum anthelmintic activity in sheep upon oral and/or parenteral administration.

    摘要翻译: 本发明涉及通过施用有效量的式(I)化合物来杀死内部寄生虫,特别是影响温血动物例如绵羊,牛,猪,山羊,狗,猫,马和人以及家禽的内部寄生虫, I:图像I某些式I的化合物是新的,并且在本发明的另外的实施方案中提供了用于本发明方法的新型化合物和组合物。 通过常规化学反应容易地制备化合物。 式I的各种吡啶基酰腙在口服和/或肠胃外给药时显示出绵羊的广谱驱虫活性。

    A CONTINUOUS FLOW SYNTHESIS METHOD FOR THE MANUFACTURE OF ISONIAZID

    公开(公告)号:US20230142405A1

    公开(公告)日:2023-05-11

    申请号:US17767773

    申请日:2020-04-23

    IPC分类号: C07D213/88

    CPC分类号: C07D213/88

    摘要: A multistep continuous flow synthesis method for the manufacture of isonicotinyl-hydrazide (Isoniazid) comprising reacting 4-cyano pyridine with NaOH at a specified molar ratio and temperature range to produce the intermediate isonicotinamide, which intermediate is reacted with hydrazine hydrate, without isolation thereof, at a specified molar ratio and temperature range to produce isonicotinyl-hydrazide (Isoniazid) in a yield greater than about 90%.