Disclosed is a rapid one-step 18F radiolabeling method for biological substrates that contain a specific arene group activated for nucleophilic aromatic substitution with 18F. The method involves reacting a biological substrate having at least one 4-nitro-3-trifluorobenzamide moiety covalently bonded thereto with a 18F anion in the presence of a cryptand. The method of the present invention has one or more advantages: significantly shortens reaction and overall synthesis time; requires low amount of precursor; and provides acceptable yields of high specific activity product. Also disclosed are methods of identifying a cell or population of cells expressing a protein or peptide of interest and methods for diagnosing a disease in a subject. Further disclosed are 18F labeled compounds of formula (I): wherein X, n, R1, R2, and R3 are as described herein.
本文揭示了一种用于含有特定
芳烃基团的
生物底物的快速一步18F放射性标记方法,该基团被激活用于与18F进行亲核芳香取代。该方法涉及在存在cryptand的情况下,将至少有一个4-硝基-3-三
氟苯甲酰基团共价键合到
生物底物上的
生物底物与18F阴离子反应。本发明的方法具有一个或多个优点:显著缩短了反应和整体合成时间;需要较少的前体量;并提供了高比活性产物的可接受产量。还揭示了用于识别表达感兴趣蛋白质或肽的细胞或细胞群的方法,以及用于诊断受试者疾病的方法。进一步揭示了化合物的18F标记的公式(I):其中X,n,R1,R2和R3如本文所述。