Rapid Thermodynamically Stable Complex Formation of [<sup>nat/111</sup>In]In<sup>3+</sup>, [<sup>nat/90</sup>Y]Y<sup>3+</sup>, and [<sup>nat/177</sup>Lu]Lu<sup>3+</sup> with H<sub>6</sub>dappa
作者:Thomas I. Kostelnik、Xiaozhu Wang、Lily Southcott、Hannah K. Wagner、Manja Kubeil、Holger Stephan、María de Guadalupe Jaraquemada-Peláez、Chris Orvig
DOI:10.1021/acs.inorgchem.0c00671
日期:2020.5.18
radiopharmaceuticals. Nuclear magnetic resonance (NMR) spectroscopy was employed to investigate the chelator coordination chemistry with a variety of nonradioactive trivalent metal ions (In3+, Lu3+, Y3+, Sc3+, La3+, Bi3+). Density functional theory (DFT) calculations explored the coordination environments of aforementioned metal complexes. The thermodynamic stability of H6dappa with four metal ions
合成了含次膦酸的吡啶甲酸基螯合配体(H6dappa),并对其特性进行了评估,以评估其作为双功能螯合剂(BFC)对于无机放射性药物的潜力。核磁共振(NMR)光谱用于研究与多种非放射性三价金属离子(In3 +,Lu3 +,Y3 +,Sc3 +,La3 +,Bi3 +)的螯合剂配位化学。密度泛函理论(DFT)计算探索了上述金属配合物的配位环境。通过电位滴定法和分光光度法(UV-vis)滴定,结合酸性分批,联合电位/分光光度法和配体-配体,深入研究了H6dappa与四种金属离子(In3 +,Lu3 +,Y3 +,Sc3 +)的热力学稳定性竞争滴定;计算了所有四种金属配合物的高稳定性常数和pM值。优化了三种临床相关放射性金属离子的放射性标记条件([111In] In3 +,[177Lu] Lu3 +,[90Y] Y3 +),并研究了[111In] [In(dappa)] 3-的血清稳定性。通过浓度,