申请人:Hwang Kook Sang
公开号:US20110034730A1
公开(公告)日:2011-02-10
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.
本发明涉及一种用作X射线造影剂的新型制备碘普罗胺的方法,其中引入了5-甲氧基乙酰氨基-2,4,6-三碘异苯二甲酸(2,3-二乙酰氧丙基)酰氯(式(19))和5-甲氧基乙酰氨基-2,4,6-三碘异苯二甲酸[(2,3-二羟基-N-甲基丙基)-(2,3-二乙酰氧丙基)]二酰胺(式(20))作为中间体,通过这种方法,在制备过程中生成的双硫醚副产物可以在不需要额外去除程序的情况下去除,从而可以高产率地制备高纯度的碘普罗胺。