Process for preparing 2-amino-5-chloropyridine
    4.
    发明授权
    Process for preparing 2-amino-5-chloropyridine 失效
    2-氨基-5-氯吡啶的制备方法

    公开(公告)号:US3985759A

    公开(公告)日:1976-10-12

    申请号:US477252

    申请日:1974-06-07

    IPC分类号: C07D213/73 C07D213/02

    CPC分类号: C07D213/73

    摘要: 2-Amino-5-chloropyridine is prepared by chlorinating 2-aminopyridine in a strongly acidic medium. 2-Amino-5-chloropyridine is a useful intermediate in the preparation of chloro-substituted-imidazo-pyridine herbicides.

    摘要翻译: 通过在强酸性介质中氯化2-氨基吡啶制备2-氨基-5-氯吡啶。 2-氨基-5-氯吡啶是制备氯代 - 咪唑并吡啶除草剂的有用中间体。

    Process for bromination of pyrimidine
    7.
    发明授权
    Process for bromination of pyrimidine 失效
    溴化嘧啶的方法

    公开(公告)号:US3956301A

    公开(公告)日:1976-05-11

    申请号:US561140

    申请日:1975-03-24

    申请人: Thomas J. Kress

    发明人: Thomas J. Kress

    IPC分类号: C07D239/30

    CPC分类号: C07D239/30

    摘要: The process for brominating pyrimidine which comprises reacting bromine at an elevated temperature with the hydrogen halide addition salt of pyrimidine in an organic solvent substantially inert to the action of bromine under the conditions of the process. The process is also shown to be applicable to other nitrogen-containing heterocycles.

    摘要翻译: 溴化嘧啶的方法,其包括在升高的温度下使溴与嘧啶的卤化氢加成盐在基本上对溴的作用惰性的有机溶剂中,在该方法的条件下。 该方法也显示适用于其它含氮杂环。

    Separation of 5-nitroquinoline and 8-nitroquinoline
    8.
    发明授权
    Separation of 5-nitroquinoline and 8-nitroquinoline 失效
    分离5-硝基喹啉和8-硝基喹啉

    公开(公告)号:US06268500B1

    公开(公告)日:2001-07-31

    申请号:US09005201

    申请日:1998-01-09

    IPC分类号: C07D21518

    CPC分类号: C07D215/18

    摘要: The present invention relates to a process for preparing 5-nitroquinoline hydrohalide comprising: (A) heating a slurry comprising a mixture of nitroquinoline position isomer hydrohalide salts in wet dimethylformamide to form a solution; (B) cooling the solution of Step (A) until a precipitate comprising 5-nitroquinoline hydrohalide is formed; and (C) collecting the precipitate.

    摘要翻译: 本发明涉及一种制备5-硝基喹啉氢卤酸酯的方法,包括:(A)将含有硝基喹啉位异构体氢卤酸盐的混合物的浆料加湿到湿二甲基甲酰胺中形成溶液;(B)冷却步骤(A)的溶液直到 形成包含5-硝基喹啉氢卤化物的沉淀物; 和(C)收集沉淀物。