Synthesis and Initial Evaluation for In Vivo Chelation of Pu(IV) of a Mixed Octadentate Spermine-Based Ligand Containing 4-Carbamoyl-3-hydroxy-1-methyl-2(1<i>H</i>)-pyridinone and 6-Carbamoyl-1-hydroxy-2(1<i>H</i>)-pyridinone
作者:Jide Xu、Patricia W. Durbin、Birgitta Kullgren、Shirley N. Ebbe、Linda C. Uhlir、Kenneth N. Raymond
DOI:10.1021/jm010564t
日期:2002.8.1
An improved synthesis for a series of 1-hydroxy-2(1H)-pyridinone-based octadentate ligands is reported. The mixed chelate, octadentate ligand, 3,4,3-LI(1,2-Me-3,2-HOPO), was designed, synthesized, and tested for in vivo chelation of Pu in a mouse model. This ligand incorporates both 1,2-HOPO and Me-3,2-HOPO metal chelating units; the latter has higher affinity toward actinide ions than does 1,2-HOPO
报道了一系列基于1-羟基-2(1H)-吡啶酮的八齿配体的合成方法的改进。设计,合成了混合的螯合物,八齿配体3,4,3-LI(1,2-Me-3,2-HOPO),并在小鼠模型中测试了Pu的体内螯合。该配体结合了1,2-HOPO和Me-3,2-HOPO金属螯合单元。在生理pH下,后者对act系离子的亲和力高于1,2-HOPO。以30 micromol / kg的标准临床剂量向禁食或正常喂养的小鼠口服或口服3,4,3-LI(1,2-HOPO)和3,4,3-LI(1,2-Me- 3,2-HOPO)除去注入的CaNa(3)DTPA明显更多的Pu。这些HOPO配体的0.1毫克/千克的注射剂量与30毫摩尔/千克的CaNa(3)DTPA注射一样有效。每天十次注射30 micromol / kg的HOPO配体未在小鼠中诱发可检测的急性毒性。口服时,混合的HOPO配体比3,4,3-LI(1,2-HOPO)更