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    • 4. 发明授权
    • Process for preparation of 3,4,5,6- tetrahydrophthalimide
    • 制备3,4,5,6-四氢邻苯二甲酰亚胺的方法
    • US5155231A
    • 1992-10-13
    • US604504
    • 1990-10-29
    • Kenji NishioShoji Tani
    • Kenji NishioShoji Tani
    • C07D307/89C07C51/083C07C51/48C07C51/493C07D209/49
    • C07C51/48C07C51/083C07C51/493
    • Disclosed is a process for preparing 3,4,5,6-tetrahydrophthalimide comprising the steps of:(i) reacting a crude 3,4,5,6-tetrahydrophthalic anhydride containing as impurities at least one carboxylic anhydride (A) selected from the group consisting of phthalic anhydride, hexahydrophthalic anhydride and structural isomers of 3,4,5,6-tetrahydrophtalic anhydride with an alcohol for conversion of substantially all the carboxylic anhydride (A) into the monoester thereof to obtain a reaction mixture containing the monoester, 3,4,5,6-tetrahydrophthalic anhydride, and if any, a monoester of 3,4,5,6-tetrahydrophthalic anhydride, and(ii) adding ammonia to the reaction mixture to subject the 3,4,5,6-tetrahydrophthalic anhydride, and if any, the monoester thereof to a reaction for conversion into 3,4,5,6-tetrahydrophthalimide.
    • 公开了一种制备3,4,5,6-四氢邻苯二甲酰亚胺的方法,包括以下步骤:(i)使含有至少一种选自以下的羧酸酐(A)作为杂质的粗制3,4,5,6-四氢邻苯二甲酸酐 由邻苯二甲酸酐,六氢邻苯二甲酸酐和3,4,5,6-四氢邻苯二甲酸酐的结构异构体与醇组成的基团,用于将基本上所有的羧酸酐(A)转化成其单酯,得到含有单酯的反应混合物3 ,4,5,6-四氢邻苯二甲酸酐,以及(如果有的话)3,4,5,6-四氢邻苯二甲酸酐的单酯,和(ii)向反应混合物中加入氨以使3,4,5,6-四氢邻苯二甲酸酐 酸酐,如果有的话,将其单酯转化成3,4,5,6-四氢邻苯二甲酰亚胺。