A pyrazolylamine-phosphonate monoester chelator for thefac-[M(CO)3]+ core (M = Re,99mTc): synthesis, coordination properties and biological assessment
作者:Elisa Palma、Bruno L. Oliveira、Flávio Figueira、João D. G. Correia、Paula D. Raposinho、Isabel Santos
DOI:10.1002/jlcr.1415
日期:2007.11
allows metal stabilization, and, simultaneously, can be considered as a potential attachment site for a biomolecule. Reaction of L4 with the precursor [99mTc(H2O)3(CO)3]+ gave the model radiocomplex [99mTc(CO)3(k3-L4)] (6a). This radiocomplex was identified by comparing its chromatographic profile with that of the corresponding Re analog (6) under the same conditions, also prepared and fully characterized
为了开发用有机金属核心 fac-[99mTc(CO)3]+ 标记含羟基生物分子的新策略,我们制备了一种新型双功能螯合剂 L4(乙基氢(2-[2-(3 ,5-二甲基-1H-吡唑-1-基)乙基]氨基}乙基)膦酸酯),结合了吡唑基-胺螯合基团和单膦酸乙酯官能团(-P(O)OHOEt)。膦酸酯基团允许金属稳定,同时,可以被认为是生物分子的潜在附着位点。L4 与前体 [99mTc(H2O)3(CO)3]+ 的反应得到模型放射性络合物 [99mTc(CO)3(k3-L4)] (6a)。这种放射性络合物是通过在相同条件下将其色谱图与相应 Re 类似物 (6) 的色谱图进行比较来鉴定的,同样是通过通常的分析技术制备和完全表征的。放射性复合物 6a 具有中等亲脂性(log Po/w = 1.07),即使在组氨酸和半胱氨酸等强竞争螯合剂存在的情况下(37°C,24 小时),在体外也表现出高稳定性,没有任何可测量的分解或配体交换。CD-1