Specific sequestering agents for the actinides. 21. Synthesis and initial biological testing of octadentate mixed catecholate-hydroxypyridinonate ligands
作者:Linda C. Uhlir、Patricia W. Durbin、Nylan Jeung、Kenneth N. Raymond
DOI:10.1021/jm00056a011
日期:1993.2
significantly more Pu excretion than an equimolar amount of CaNa3DTPA. Potency of the CAM-HOPO ligands for in vivo chelation of Pu(IV) resembled that of structurally hexadentate tris-(hydroxypyridinonate) and tris(sulfocatecholate) ligands and functionally hexadentate tetrakis-(sulfocatecholate) and tetrakis(carboxycatecholate) ligands. The Pu complexes of the CAM-HOPO ligands are to some degree unstable
线性八齿配体3,4,3-LIHOPO包含四个1-羟基-2(1H)-吡啶酮(1,2-HOPO)基团,是目前制备的Pu(IV)体内螯合最有效的试剂。但是,其临床潜力受到高剂量游离配体(而非Fe3 +复合物)的急性毒性的限制。HOPO配体的高酸度和邻苯二酚(CAM)配体的低酸度表明,含有一个或两个1,2-HOPO和三个(或两个)邻苯二酚(CAM)基团的混合八齿(CAM-HOPO)配体可能与有效去除Pu [在pH>或= 6时形成八配位的Pu(IV)络合物],毒性比3,4,3-LIHOPO低。用3-(2,3-二甲氧基苯甲酰基)噻唑-吡啶-2-硫酮(1)(摩尔比2:1)处理精胺,得到1,14-双(2,3-二甲氧基苯甲酰基)-1,5,10, 14-四氮杂十四烷(2,DiCAM-精胺),收率80%。在N,N-二甲基甲酰胺(DMF)中1-羟基-2-吡啶酮-6-羧酸(HOPO-C)和1,1'-羰基二咪唑(CD