METHOD FOR PREPARING PRECURSOR USED FOR LABELING HEPATOCYTE RECEPTOR AND CONTAINING TRISACCHARIDE AND DTPA LIGAND
申请人:LIN CHIH-YUAN
公开号:US20140046045A1
公开(公告)日:2014-02-13
A method for preparing a precursor used to label hepatocyte receptors is revealed. The precursor contains a bifunctional structure including trisaccharide and DTPA ligand. During synthesis processes of the precursor, silica gel columns and Reverse phase-18 (RP-18) columns are used for purification. Thus both the purification times and cost of each purification are reduced. Moreover, use diethyl ether to facilitate precipitation of products and remove a part of coupling reagent. Removing the coupling reagent helps purification of products. Furthermore, N
α
,N
α
-bis(carboxymethyl)-L-lysine hydrate and benzyl chloroformate are coupled to form a trisaccharide skeleton so as to ensure the yield rate of trisaccharide structure.
揭示了一种用于标记肝细胞受体的前体制备方法。该前体包含一个双功能结构,包括三糖和DTPA配体。在前体的合成过程中,使用硅胶柱和反相-18(RP-18)柱进行纯化。因此,每次纯化的纯化次数和成本都得到了降低。此外,使用乙醚有助于沉淀产物并去除部分偶联试剂。去除偶联试剂有助于产物的纯化。此外,Nα,Nα-双(羧甲基)-L-赖氨酸水合物和苄基氯甲酸酯被耦合形成三糖骨架,以确保三糖结构的产率。