NOVEL PROCESS FOR PREPARATION OF IOPROMIDE
    15.
    发明公开
    NOVEL PROCESS FOR PREPARATION OF IOPROMIDE 审中-公开
    新方法用于生产iopromid

    公开(公告)号:EP2271615A1

    公开(公告)日:2011-01-12

    申请号:EP09738936.5

    申请日:2009-04-17

    IPC分类号: C07C231/02

    CPC分类号: C07C231/02 C07C235/68

    摘要: The present invention relates to a novel process for preparing iopromide which is used as a contrast agent for X-ray, wherein 5-methoxyacetylamino-2,4,6-triiodoisophthalic acid (2,3-diacetoxypropyl)amide chloride of formula (19) and 5-methoxyacetylamino-2,4,6-triiodoisophthalic acid [(2,3-dihydroxy-N-methylpropyl)-(2,3-diacetoxypropyl)]diamide of formula (20) are introduced as intermediates, by which a bismer by-product generated during the preparation process can be removed even without an additional removal procedure and thus iopromide with high purity can be prepared in high yield.