Highly Stable Silver(I) Complexes with Cyclen-Based Ligands Bearing Sulfide Arms: A Step Toward Silver-111 Labeled Radiopharmaceuticals
作者:Marianna Tosato、Mattia Asti、Marco Dalla Tiezza、Laura Orian、Daniel Häussinger、Raphael Vogel、Ulli Köster、Mikael Jensen、Alberto Andrighetto、Paolo Pastore、Valerio Di Marco
DOI:10.1021/acs.inorgchem.0c01405
日期:2020.8.3
constants of the complexes, whereas NMR and DFT calculations gave structural insights. Overall results indicated that sulfide pendant arms coordinate Ag+ allowing the formation of very stable complexes, both at acidic and physiological pH. Furthermore, radiolabeling, stability in saline phosphate buffer, and metal-competition experiments using the two ligands forming the strongest complexes, DO4S and DO4S4Me
随着7.45天的半衰期,银111(β最大值1.04兆电子伏,ē γ 245.4千电子伏[我γ 1.24%],ê γ 342.1千电子伏[我γ 6.7%)是肿瘤靶向治疗的有希望的候选β –发射器以及相关的SPECT成像。对于其临床用途,开发了在体内形成足够稳定的Ag +-复合物的合适配体是必须的。在这项工作中,以下四氮杂环十二烷(环素)的含硫衍生物被认为是银111的潜在螯合剂:1,4,7,10-四(2-(甲基硫烷基)乙基)-1,4,7, 10-四氮杂环十二烷(DO4S),(2S,5S,8S,11S)-2,5,8,11-四甲基-1,4,7,10-四(2-(甲基硫烷基)乙基)-1,4,7 ,10-四氮杂环十二烷(DO4S4Me),1,4,7-三(2-(甲基硫烷基)乙基)-1,4,7,10-四氮杂环十二烷(DO3S),1,4,7-三(2-(甲基硫烷基)乙基)-10-乙酰氨基-1,4,7,10-四氮杂环十二烷(DO3SAm)和1