Process for producing 4-dimethyl amino pyridine (4-DMAP)
    2.
    发明公开
    Process for producing 4-dimethyl amino pyridine (4-DMAP) 有权
    Verfahren zur Herstellung von 4-二甲基氨基吡啶(4-DMAP)

    公开(公告)号:EP1424328A1

    公开(公告)日:2004-06-02

    申请号:EP03004093.5

    申请日:2003-02-25

    IPC分类号: C07D213/74

    CPC分类号: C07D213/74

    摘要: An improved process for producing 4-dimethyl amino pyridine is provided. The process comprises quaternizing pyridine with a suitable quaternizing agent in the presence of organic solvent, isolating the resulting salt and aminating the salt, N- [4-pyridyl] pyridinium chloride hydrochloride, with N, N-dimethyl formamide. The resultant reaction mass is hydrolysed in the presence of a base, extracted with a suitable organic solvent and distilled under vacuum to produce 4-dimethyl amino pyridine.

    摘要翻译: 提供了一种改进的制备4-二甲基氨基吡啶的方法。 该方法包括在有机溶剂存在下用合适的季铵化剂季铵化吡啶,分离得到的盐,并用N,N-二甲基甲酰胺胺化盐,N-哒嗪基氯化吡啶鎓盐酸盐。 所得反应物质在碱的存在下水解,用合适的有机溶剂萃取并真空蒸馏,得到4-二甲基氨基吡啶。