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    • 3. 发明授权
    • Process for preparing amic acid esters
    • 酰胺酸酯的制备方法
    • US06576765B2
    • 2003-06-10
    • US09980103
    • 2002-03-18
    • Keisuke Isozumi
    • Keisuke Isozumi
    • C07D27764
    • C07C269/04C07D277/64
    • The present invention provides a process for producing an amic acid ester represented by the following general formula (7) (wherein A is substituted or unsubstituted lower alkylene or the like; R1 is substituted or unsubstituted lower alkyl or the like; and R3 is hydrogen or lower alkyl), which process comprises reacting, in the presence of water, an amino acid represented by formula (1) with a halogenated carbonic acid ester represented by formula (2) (wherein X is halogen) to form an amide compound represented by formula (3), then reacting the amide compound with a halogenated carbonic acid ester represented by formula (4) (wherein R2 is substituted or unsubstituted lower alkyl or the like; and X is halogen) to form, in the system, a mixed acid anhydride represented by formula (5), and reacting the mixed acid anhydride with an amine compound represented by formula (6) (wherein Het is substituted or unsubstituted heterocyclic).
    • 本发明提供由以下通式(7)表示的酰胺酸酯的制造方法(其中A为取代或未取代的低级亚烷基等; R 1为取代或未取代的低级烷基等; R 3为氢或 低级烷基),该方法包括在水存在下使由式(1)表示的氨基酸与由式(2)表示的卤代碳酸酯(其中X为卤素)反应以形成式 (3),然后使酰胺化合物与由式(4)表示的卤代碳酸酯(其中R 2是取代或未取代的低级烷基等,X是卤素)反应,在体系中形成混合酸酐 由式(5)表示,并使混合的酸酐与由式(6)表示的胺化合物(其中Het是取代或未取代的杂环)反应。