申请人:Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.O.C.
公开号:US20170183372A1
公开(公告)日:2017-06-29
The present invention provides a method for preparing a 6-aminohexyl lactoside-NOTA conjugate. The preparation method comprises brominating perbenzoylated lactose with hydrobromic acid; glycosylating 6-azidohexanol to obtain 6-azidohexyl perbenzoyl lactoside; and deprotecting this precursor in two steps to obtain 6-aminohexyl lactoside and conjugating 6-aminohexyl lactoside to NCS-benzyl-NODA GA (i.e. 2,2′-(7-(1-carboxy-4-((4-isothiocyanate benzyl) amino)-4-oxobutyl)-1,4,7-triazonane-1,4-diyl) diacetic acid) in triethyl amine as an alkaline solvent, to obtain a 6-aminohexyl lactoside-NCS-benzyl-NODA GA conjugate. In this novel preparation method, no deglycosylated side product is produced, such that the yield is considerably increased to 46%. Therefore, the method is suitable for future massive production since the requirement for repeated preparations for massive production is reduced, and the impurities produced in the previously scaled-up preparation process are not present.
本发明提供了一种制备6-氨基己基乳糖苷-NOTA共轭物的方法。制备方法包括用氢溴酸溴化过苯甲酰化乳糖;将6-叠氮己醇糖基化以获得6-叠氮己基过苯甲酰化乳糖苷;并通过两步去保护该前体以获得6-氨基己基乳糖苷,并将6-氨基己基乳糖苷与NCS-苄基-NODA GA(即2,2′-(7-(1-羧基-4-((4-异硫氰苯基)氨基)-4-氧代丁基)-1,4,7-三氮杂环-1,4-二基)二乙酸)在三乙胺作为碱性溶剂中进行共轭,以获得6-氨基己基乳糖苷-NCS-苄基-NODA GA共轭物。在这种新颖的制备方法中,不会产生去糖基化的副产物,使得产率显著提高至46%。因此,该方法适用于未来的大规模生产,因为减少了大规模生产的重复制备要求,并且以前扩大规模制备过程中产生的杂质不再存在。