Comparative in Vivo Behavior Studies of Cyclen-Based Copper-64 Complexes: Regioselective Synthesis, X-ray Structure, Radiochemistry, log <i>P</i>, and Biodistribution
作者:Jeongsoo Yoo、David E. Reichert、Michael J. Welch
DOI:10.1021/jm0496990
日期:2004.12.1
number of acetate groups increased, the lipophilicity was decreased. The biodistribution of Cu-cyclen complexes was found to be influenced mostly by the overall charge of the complexes rather than their lipophilicity. Positively charged (+2) complexes showed high blood retention at early time points with sluggish clearance from liver by 24 h. The attachment of even one acetate group onto cyclen accelerated
通过用两个不同的取代基4-叔丁基苄基和乙酸酯取代母体配体来修饰铜(II)-周期素络合物的体内行为。这是通过使用相同的合成策略(区域选择性保护/第一个烷基化/脱保护/第二个烷基化)获得的,得到九个环素衍生物。[Cu(2c)Cl] +(2c = 1-(4-叔丁基苄基)-1,4,7,10-四氮杂环十二烷)的X射线结构表明,反应混合物中的氯离子占据了其余的顶端这些Cu-周期环配合物的方形锥体配位环境的位置。9种化合物中有8种用高放射性化学纯度的64Cu标记。log P测量表明,通过将疏水性取代基连接到cyclen的氮原子上,铜络合物的亲脂性显着提高。相反,随着乙酸酯基团数目的增加,亲脂性降低。发现铜-细胞周期蛋白复合物的生物分布主要受复合物总电荷的影响,而不是其亲脂性。带正电荷(+2)的复合物在早期时间点显示较高的血液滞留,并且到24 h时从肝脏清除缓慢。与+2电荷的Cu(II)配合物相比,即使将