Method for producing o-chloromethyl benzoic acid chlorides
    1.
    发明授权
    Method for producing o-chloromethyl benzoic acid chlorides 失效
    邻氯甲基苯甲酸氯化物的生产方法

    公开(公告)号:US07034181B1

    公开(公告)日:2006-04-25

    申请号:US10130821

    申请日:2000-11-27

    IPC分类号: C07C51/58

    CPC分类号: C07C51/60 C07C63/10

    摘要: The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which R1 to R4 can be the same or different and represent hydrogen C1–C4 alkyl, halogen or trifluoromethyl, by reaction benzo condensed lactones of formula (II), in which R1 to R4 have the above-mentioned meaning, with thionyl chloride. The inventive method is characterized in that the reaction is carried out in the presence of catalytic quantities of a Lewis acid and in the presence of catalytic quantities of a phosphine derivative.

    摘要翻译: 本发明涉及一种制备式(I)的邻氯甲基苯甲酰氯的方法,其中R 1至R 4可以相同或不同,表示氢 C 1 -C 4烷基,卤素或三氟甲基,通过反应式(II)的苯并稠合内酯,其中R 1至R 4, SUP> 4 具有上述含义,与亚硫酰氯。 本发明的方法的特征在于反应在催化量的路易斯酸存在下和在催化量的膦衍生物的存在下进行。