Process for the manufacture of 2,3-dichloropyridine
    41.
    发明申请
    Process for the manufacture of 2,3-dichloropyridine 审中-公开
    2,3-二氯吡啶的制备方法

    公开(公告)号:US20070161797A1

    公开(公告)日:2007-07-12

    申请号:US10583635

    申请日:2005-01-21

    申请人: Rafael Shapiro

    发明人: Rafael Shapiro

    IPC分类号: C07D213/61

    摘要: A method for preparing 2,3-dichloropyridine is disclosed in which 3-amino-2-chloropyridine is contacted with an alkali metal nitrite in the presence of aqueous hydrochloric acid to form a diazonium salt; and the diazonium salt is subsequently decomposed in the presence of copper catalyst wherein at least about 50% of the copper is the copper(II) oxidation state.

    摘要翻译: 公开了一种制备2,3-二氯吡啶的方法,其中3-氨基-2-氯吡啶与碱金属亚硝酸盐在盐酸水溶液的存在下接触以形成重氮盐; 随后在铜催化剂存在下分解重氮盐,其中至少约50%的铜是铜(II)氧化态。