专利号:EP-2281807-A1 优先权日:2009-07-21 标 题 :Decolorizing 5-amino-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide, a contrast media intermediate 发明人:INGVOLDSTAD ODD EINAR 权利人:GE HEALTHCARE AS 摘要:This invention relates to an improved method for the synthesis of 5-amino-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (Compound B), an intermediate in the industrial preparation of non-ionic X-ray contrast agents. In particular, it relates to a process for decolorizing said intermediate.