Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid
    17.
    发明授权
    Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid 失效
    制备4'-羟基联苯-4-羧酸的方法

    公开(公告)号:US4755617A

    公开(公告)日:1988-07-05

    申请号:US31709

    申请日:1987-03-30

    CPC分类号: C07C51/347 C07C51/377

    摘要: A process for the preparation of 4'-hydroxybiphenyl-4-carboxylic acid by reacting a cyclohexanone-4-carboxylic acid compound with phenol in the presence of an acid catalyst, and then subjecting the resulting 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid compound to decomposition and dehydrogenation reactions in the presence of a base and a dehydrogenation catalyst. The aforesaid cyclohexanone-4-carboxylic acid compound is obtained by catalytically hydrogenating a 4-hydroxybenzoic acid compound in a secondary alcohol or tertiary alcohol solvent, and the reaction mixture thus obtained is directly used for the reaction with phenol.

    摘要翻译: 通过环己酮-4-羧酸化合物与苯酚在酸催化剂存在下反应制备4'-羟基联苯-4-羧酸的方法,然后将所得的4,4'-双(4-羟基苯基) 环己烷羧酸化合物在碱和脱氢催化剂存在下进行分解和脱氢反应。 上述环己酮-4-羧酸化合物是通过在仲醇或叔醇溶剂中催化氢化4-羟基苯甲酸化合物而获得的,所得反应混合物直接用于与苯酚反应。