Influence of the ligand donor atoms on the in vitro stability of rhenium(I) and technetium (I)-99m complexes with pyrazole-containing chelators: Experimental and DFT studies
作者:Carolina Moura、Célia Fernandes、Lurdes Gano、António Paulo、Isabel C. Santos、Isabel Santos、Maria José Calhorda
DOI:10.1016/j.jorganchem.2008.11.027
日期:2009.3
retention found for 2a has shown that this complex is more adequate to be further explored in radiopharmaceutical sciences. DFT calculations (ADF program) were performed for these neutral complexes and related cationic M(I) (M = Re, Tc) tricarbonyl complexes anchored by pyrazole-containing ligands, in order to have a better understanding of the influence of the donor atom set (N,N,O vs. N,O,S; N,N,N vs. N,N
配体3,5--ME的新含吡唑的2 PZ(CH 2)2 S(CH 2)2 COOH(大号1 1H)合成并用于制备复合物FAC - [M(κ 3 -L 1)( CO)3 ](M = Re(1),99m Tc(1a)),尽管在99m Tc的情况下比活度较低,但仍以高收率获得。X射线衍射分析1证实L 1以单阴离子形式并通过(N,S,O)供体原子与金属配位。1a的挑战实验对半胱氨酸和组氨酸的抗性表明该复合物在体外遭受相当大的转螯作用。与此相反,由相关复杂表现出的行为FAC - [ 99米TC(κ 3 -大号2)(CO)3 ](2A)(大号2 = 3,5-我2 PZ-(CH 2)2 NH-CH 2 -COO),由(N 2 O)-三齿配体锚定。1a和2a的生物分布研究小鼠的体内实验表明这两种化合物具有相对相似的生物学特性。但是,对于2a而言,最快的血液清除率和较小的肝retention留性已表明,这种