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    • 18. 发明授权
    • Adducts of macrocyclic chelants
    • 大环螯合剂的加合物
    • US5554748A
    • 1996-09-10
    • US175989
    • 1993-12-30
    • Paul F. SievingAlan D. Watson
    • Paul F. SievingAlan D. Watson
    • A61K47/48A61K49/08A61K49/12A61K51/06C08G69/48C07D255/02C07D257/02C07D273/00
    • A61K49/143A61K47/48076A61K47/48315A61K49/085A61K49/106A61K49/128A61K49/146A61K51/065C08G69/48
    • There are provided polychelants and their metal chelates which are useful in diagnostic imaging and in radiotherapy and which comprise a plurality of macrocyclic chelant moieties, e.g. DOTA residues, conjugated to a polyamine backbone molecule, e.g. polylysine. To produce a site-specific polychelate, one or more of the macrocyclic chelant carrying backbone molecules may be conjugated to a site-directed macromolecule, e.g. a protein. For example, adducts of a macrocyclic chelant can be formed by the process of (a) dispersing a carboxylic macrocyclic chelant in a polar, anhydrous solvent, (b) adding a base with a pKa sufficient to remove all carboxyl protons to create an amine salt of the chelant soluble in the solvent, (c) chilling the reaction mixture to between about 5.degree. C. and 55.degree. C. above the freezing point of the solvent, and (d) adding substantial equimolar amount of chilled alkylhaloformate under anhydrous conditions so as to form a slurry containing the mixture carboxycarbonic anhydride of the chelant.
    • 提供了可用于诊断成像和放射治疗中的多层螯合物及其金属螯合物,其包含多个大环螯合剂部分,例如, 与多胺主链分子缀合的DOTA残基。 聚赖氨酸 为了产生位点特异性聚合物,一种或多种携带骨架分子的大环螯合剂可以与位点定向的大分子结合,例如 蛋白质 例如,大环螯合剂的加合物可以通过以下方法形成:(a)将羧基大环螯合剂分散在极性无水溶剂中,(b)加入足以除去所有羧基质子以产生胺盐的pKa碱 的螯合剂溶于溶剂中,(c)将反应混合物冷却至高于溶剂凝固点的约5℃至55℃,和(d)在无水条件下加入基本上等摩尔量的冷却的卤代烷基卤化物, 以形成含有螯合剂的羧基碳酸酐混合物的浆料。