Process for the production of nuclear substituted cinnamoylanthranilic
acid derivatives
    5.
    发明授权
    Process for the production of nuclear substituted cinnamoylanthranilic acid derivatives 失效
    制备核取代肉桂酰邻氨基苯甲酸衍生物的方法

    公开(公告)号:US4587356A

    公开(公告)日:1986-05-06

    申请号:US654231

    申请日:1984-09-25

    CPC分类号: C07D295/027

    摘要: The present invention provides an improved method for producing a nuclear substituted cinnamoylanthranilic acid compound.Illustrative of the process is the reaction of 3-hydroxy-4-methoxybenzaldehyde with 2-carboxymalonanilic acid in an inert solvent medium in the presence of a molar excess of piperidine to provide a high purity intermediate salt precipitate, and the salt is treated with an acidic reagent to yeild N-(3-hydroxy-4-methoxycinnamoyl)anthranilic acid product.

    摘要翻译: 本发明提供了制备核取代肉桂酰邻氨基苯甲酸化合物的改进方法。 该方法的实例是在惰性溶剂介质中,在摩尔过量的哌啶存在下,3-羟基-4-甲氧基苯甲醛与2-羧基丙二酸的反应,得到高纯度的中间盐沉淀物,盐用 酸性试剂洗脱N-(3-羟基-4-甲氧基肉桂酰)邻氨基苯甲酸产物。