RECOVERING UNREACTED INTERMEDIATE FROM DESALINATED AND DESOLVENTIZED DIMERISATION REACTION MIXTURE BY ULTRAFILTRATION
申请人:HOMESTAD OLE MAGNE
公开号:US20110021828A1
公开(公告)日:2011-01-27
This invention relates generally to industrial preparation of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), a non-ionic X-ray contrasting agent. It further relates to a method of recovering intermediate 5-acetamido-N,N-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”) from the desalinated and desolventized dimerisation reaction mixture. In particular, the present invention employs ultrafiltration to recover non-crystalline Compound A to reduce the overall cost of iodixanol manufacture, increase the yield of iodixanol, and facilitate the subsequent purification procedures to meet the regulatory purity requirement of iodixanol.
该发明通常涉及对碘沙映(1,3-双(乙酰胺基)-N,N′-双[3,5-双(2,3-二羟基丙基氨甲酰)-2,4,6-三碘苯基]-2-羟基丙烷)的工业制备,碘沙映是一种非离子X射线造影剂。它进一步涉及从去盐和去溶剂化的二聚反应混合物中回收中间体5-乙酰胺基-N,N-双(2,3-二羟基丙基)-2,4,6-三碘异苯二酰胺(“化合物A”)的方法。具体来说,本发明采用超滤技术回收非晶态的化合物A,以降低碘沙映制造的总成本,增加碘沙映的产量,并促进后续的纯化程序,以满足碘沙映的监管纯度要求。