Synthesis and Physicochemical Characterization of New C-Functionalized Derivatives of the Gadolinium(III) Complex with 3,6,10-Tris(carboxymethyl)-3,6,10-triazadodecanedioic Acid (H5ttda) Exhibiting Fast Water Exchange – Potential Paramagnetic Reporters for Molecular Imaging
作者:Sophie Laurent、Luce Vander Elst、Antoine Vroman、Robert N. Muller
DOI:10.1002/hlca.200790057
日期:2007.3
that [Gd(ttda)] derivatives have a significantly shorter residence time τM of the coordinated H2O molecule than [Gd(dtpa)], four new C-functionalized [Gd(ttda)] complexes, [Gd(4-Me-ttda)] (1), [Gd(4-Ph-ttda)] (2), [Gd(9-Me-ttda)] (3), and [Gd(9-Ph-ttda)] (4), were prepared and characterized (H5ttda=3,6,10-tris(carboxymethyl)-3,6,10-triazadodecanedioic acid; H5dtpa=3,6,9-tris(carboxymethyl)-3,6,9-triazaundecanedioic
为了确认观察到[钆(TTDA)]衍生物具有显著较短的停留时间τ中号的协调ħ 2水分子比[钆(DTPA)],四个新的C-官能[钆(TTDA)]配合物,[钆(4-Me-ttda)](1),[Gd(4-Ph-ttda)](2),[Gd(9-Me-ttda)](3)和[Gd(9-Ph-ttda)制备并表征](4)(H 5 ttda = 3,6,10-三(羧甲基)-3,6,10-三氮杂十二烷二酸; H 5 dtpa = 3,6,9-三(羧甲基)-3 ,6,9-三氮杂十二烷二酸)。这些配合物在0.47 T时质子弛豫率与H 2的17 O横向弛豫率的温度相关性在7.05 T处的17 O证实质子弛豫性不受H 2 O交换速率的限制。根据17 O-NMR数据计算,H 2 O分子在310配合物的第一个配位球中在310 K处的停留时间分别为13、43、2.9和56 ns(1、2、3和4), 分别。在310 K时,纵