Process for the preparation of alkanoyloxy-benzenesulfonic acids and salts thereof
    5.
    发明授权
    Process for the preparation of alkanoyloxy-benzenesulfonic acids and salts thereof 有权
    烷酰氧基 - 苯磺酸及其盐的制备方法

    公开(公告)号:US06218555B1

    公开(公告)日:2001-04-17

    申请号:US09543950

    申请日:2000-04-06

    IPC分类号: C07C5300

    摘要: Disclosed is a process for the preparation of alkanoate esters of hydroxybenzenesulfonic acids and salts thereof by the steps of (1) contacting or reacting phenol with an alkanoic acid in the presence of trifluoroacetic acid (TFA) and trifluoroacetic anhydride (TFAA) to produce a aryl alkanoate ester and (2) contacting the reaction mixture of step (1) with a sulfonating agent to convert the aryl alkanoate ester to an alkanoate ester of hydroxybenzenesulfonic acid. The process provides the economic advantage inherent in using the product of esterification of step (1) without Disolation in the sulfonation of step (2).

    摘要翻译: 公开了通过以下步骤制备羟基苯磺酸的链烷酸酯及其盐的方法:(1)在三氟乙酸(TFA)和三氟乙酸酐(TFAA)存在下使苯酚与烷酸接触或反应,生成芳基 链烷酸酯和(2)使步骤(1)的反应混合物与磺化剂接触以将芳基链烷酸酯转化为羟基苯磺酸的链烷酸酯。 该方法提供了在步骤(2)的磺化中使用步骤(1)的酯化产物而没有分离的固有的经济优点。