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    • 9. 发明授权
    • Process of preparing N-substituted aldobionamides
    • 制备N-取代的醛二酰胺的方法
    • US5336765A
    • 1994-08-09
    • US23529
    • 1993-02-26
    • Van AuBijan Harirchian
    • Van AuBijan Harirchian
    • C07C235/06C07H15/04C07H15/00
    • C07H15/04C07C235/06Y02P20/582
    • A process of preparing aldobionamides and N-substituted aldobionamides which includes the steps of recovering a by-product of the process (an ammonium salt of an aldobionic acid) and converting it into at least one starting material. Aldobiono-1,5-lactone is reacted with a primary or secondary amine and the resulting solution containing the by-product of the reaction is passed through an anionic exchange column to obtain the eluate containing the starting amine and some aldobionamide. The eluate may be recycled as part of the starting material mixture. Alternatively, the amine and the aldobionamide may be recovered from the eluate, and the amine alone may be recycled. Aldobionate anion is retained on the column and may be converted into the salt of an aldobionic acid and then into the aldobionic acid.
    • 制备醛二酰胺和N-取代的醛二酰胺的方法,其包括回收方法的副产物(醛糖酸的铵盐)并将其转化为至少一种起始原料的步骤。 将醛缩二酮-1,5-内酯与伯胺或仲胺反应,并将所得含有反应副产物的溶液通过阴离子交换柱,得到含有起始胺和一些醛二酰胺的洗脱液。 洗脱液可作为原料混合物的一部分再循环。 或者,胺和醛二酰胺可以从洗脱液中回收,单独的胺可以被再循环。 醛缩醇阴离子保留在柱上,可以转化成醛糖酸的盐,然后转化成醛糖酸。