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    • 10. 发明授权
    • Process for the preparation of iopamidol and the new intermediated therein
    • 制备碘帕醇及其中间体的方法
    • US07034183B2
    • 2006-04-25
    • US10433389
    • 2001-11-29
    • Pier Lucio AnelliMarino BrocchettaGiovanna LuxEnrico Cappelletti
    • Pier Lucio AnelliMarino BrocchettaGiovanna LuxEnrico Cappelletti
    • C07C233/65
    • C07C231/02C07C237/46
    • A process for the preparation of (S)-N,N′-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-5-[(2-hydroxy-1-oxo-propyl)amino]-2,4,6-triiodo-1,3-benzendicarboxamide (iopamidol) starting from 5-amino-N,N′-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodo-1,3-benzenedicarboxamide (II) which process comprises a) reacting the compound of formula (II) with a suitable protecting agent, to give a compound of formula (III) wherein R is a group of formula A or B wherein R1 is a hydrogen atom, a C1÷C4 straight or branched alkoxy group, R2 is hydrogen, a C1÷C4 straight or branched alkoxy group and R3 ?is a C1÷C4 straight or branched alkyl group, a trifuoromethyl or a trichloromethyl group; b) acylating the amino group in position 5 of the intermediate compound of formula (III), by reaction with a (S)-2-(acetyloxy)propanoyl chloride to give a compound of formula (IV) wherein R is as defined above; and c) removing all the acyl groups present in the compound of formula (IV) under basic conditions, with prior cleavage of the cyclic protections of the hydroxy groups in the carboxamido substituents under acidic conditions, when R is a group of formula A carboxamido hydroxy groups under acidic conditions. The invention also refers to the new intermediates of formula (III) and (IV) wherein —R is a group A.
    • 制备(S)-N,N'-双[2-羟基-1-(羟甲基)乙基] -5 - [(2-羟基-1-氧代 - 丙基)氨基] -2,4, 5-氨基-N,N'-双[2-羟基-1-(羟甲基)乙基] -2,4,6-三碘-1,3-苯二甲酰胺的6-三碘-1,3-苯二甲酰胺(碘帕醇) (II)所述方法包括a)使式(II)化合物与合适的保护剂反应,得到其中R为式A或B的基团的式(III)化合物,其中R 1 >是氢原子,C 1或C 4直链或支链烷氧基,R 2是氢,C 1 直链或支链烷氧基,R 3?是C / C 直链或支链烷基,三氟甲基或三氯甲基; b)通过与(S)-2-(乙酰氧基)丙酰氯反应,酰化式(III)中间体化合物的第5位的氨基,得到其中R如上定义的式(Ⅳ)化合物; 和c)在碱性条件下除去存在于式(Ⅳ)化合物中的所有酰基,在R是式A的基团时,先前在酸性条件下,在甲酰氨基取代基中羟基的环保保护被切割。 在酸性条件下。 本发明还涉及式(III)和(IV)的新中间体,其中-R是基团A.