New Bioconjugated Technetium and Rhenium Folates Synthesized by Transmetallation Reaction with Zinc Derivatives
作者:Jordi Borràs、Julie Foster、Roxana Kashani、Laura Meléndez-Alafort、Jane Sosabowski、Joan Suades、Ramon Barnadas-Rodríguez
DOI:10.3390/molecules26082373
日期:——
zinc reagent is easily removed by centrifugation. The Tc-99m complexes were characterized by comparing their HPLC with those of the homologous rhenium complexes (2Re and 3Re) previously synthesized and characterized by standard methods. Preliminary in vivo studies with 2Tc and 3Tc indicate low specific binding to folate receptors. In summary, Tc-99m folates 2Tc and 3Tc were prepared in high yields, using
使用适当的叶酸衍生物和官能化的二硫代氨基甲酸锌(1 Zn),通过简单直接的方法合成了由叶酸2 Zn和3 Zn官能化的二硫代氨基甲酸锌。锌络合物2 Zn和3 Zn在水中的溶解度非常低,使其可用于制备具有潜在高摩尔活性的Tc-99m放射性药物。因此,锌络合物2 Zn或3 Zn与阳离子fac- [ 99m Tc(H 2O)3(CO)3 ] +,在单齿配体TPPTS的存在下,导致与叶酸生物共轭的2 +1个复合物fac- [ 99m Tc(CO)3(SS)(P)]的形成(2 Tc和3 Tc)。尽管2 Zn和3 Zn在水中的溶解度较低,但反应收率仍高于95%,并且多余的锌试剂很容易通过离心去除。Tc-99m配合物的特征在于将其HPLC与同源rh配合物(2 Re和3 Re)之前已通过标准方法合成和表征。用2 Tc和3 Tc进行的初步体内研究表明与叶酸受体的特异性结合较低。综上所述,在适中的温度下,通过与低可溶性二硫代氨基甲酸锌(>