Process for the preparation of a quinoline carboxylic acid
    3.
    发明授权
    Process for the preparation of a quinoline carboxylic acid 有权
    制备喹啉羧酸的方法

    公开(公告)号:US09193686B2

    公开(公告)日:2015-11-24

    申请号:US14357254

    申请日:2012-11-14

    摘要: The invention provides a process for the preparation of a carboxylic acid of formula (IV) (which is useful as a safener for herbicides): wherein R1 is hydrogen or chlorine, comprising the steps of: (i) subjecting a compound of formula (V) wherein: R1 is as defined above; and R2 is C1-C18 alkyl; C1-C6 alkoxyC1-C8 alkyl-; optionally substituted phenyl; or optionally substituted benzyl; to hydrolysis under acidic conditions to give a solution of a quinolinium salt; and (ii) adding base to the solution obtained in step (i) to give the free carboxylic acid (IV). The invention also provides a solid (e.g. particulate) form of one quinoline carboxylic acid compound within formula (IV) defined by R1 being chlorine; and novel intermediates useable in the above process.

    摘要翻译: 本发明提供了制备式(Ⅳ)羧酸的方法(其可用作除草剂的安全剂):其中R 1是氢或氯,包括以下步骤:(ⅰ)使式(Ⅴ)化合物 )其中:R1如上所定义; R2为C1-C18烷基; C 1 -C 6烷氧基C 1 -C 8烷基 - ; 任选取代的苯基; 或任选取代的苄基; 在酸性条件下水解,得到喹啉盐溶液; 和(ii)向步骤(i)中获得的溶液中加入碱,得到游离羧酸(IV)。 本发明还提供由R1定义的式(IV)中的一种喹啉羧酸化合物的固体(例如颗粒)形式为氯; 和可在上述方法中使用的新型中间体。