Specific sequestering agents for the actinides. 16. Synthesis and initial biological testing of polydentate oxohydroxypyridinecarboxylate ligands
作者:David L. White、Patricia W. Durbin、Nylan Jeung、Kenneth N. Raymond
DOI:10.1021/jm00396a005
日期:1988.1
that octadentate ligands containing hydroxamate or catecholate functional groups, which are found in microbial iron chelating agents (siderophores), would be effective and relatively selective complexing agents for actinide(IV) ions. However, their usefulness for in vivo chelation of actinide(IV) is limited, because catechol and hydroxamate are such weak acids that the potential for octadentate binding
IV(IV)和铁(III)的化学和生物学相似性表明,在微生物铁螯合剂(铁载体)中发现的含有异羟肟酸酯或儿茶酚官能团的八齿配体将是有效的且相对选择性的act系元素配位剂离子。但是,它们对act系元素(IV)体内螯合的用途受到限制,因为儿茶酚和异羟肟酸酯是弱酸,以致在生理pH下无法达到系元素(IV)八齿结合的潜力。因此,将结构相似的单质子和更酸性的1-羟基-2(1H)-吡啶酮(1,2-HOPO)基团并入多齿配体中。在THF溶液中用光气处理1,2-二氢-1-羟基-2-羟基吡啶氧-6-羧酸(5),得到活性酯聚[1,2-二氢-1,[2-二氧代吡啶-6-羧酸盐],用过量的无水二甲基胺处理后,得到60%的N,N-二甲基-1,2-二氢-1-羟基-2-氧-2-氧吡啶-6-羧酰胺(6)。由5和等摩尔量的光气在N,N-二甲基乙酰胺中制备类似的反应性中间体。原位与1,3-丙二胺,苄胺,亚精胺,亚精胺,1,3,5-