A novel homobifunctional cross-linker based on a bis-sultone benzenic scaffold was synthesised. The potential utility of this bioconjugation reagent was demonstrated through the preparation of an original prosthetic group suitable for the [18F]-labelling of peptides. The labelling strategy is based on the nucleophilic fluorination via the ring-opening of a first sultone moiety followed by the nucleophilic ring-opening of the second remanent sultone by a reactive amine of the biopolymer. Beyond the one-step radiolabelling of the peptide, the second main advantage of this strategy is the release of free sulfonic acid moieties making the separation of the targeted [18F]-tagged sulfonated compound from its non-sulfonated precursor easier and thus faster. This first report of the successful use of a bis-sultone moiety as a versatile bioconjugatable group was demonstrated through a comprehensive reactivity study involving various nucleophiles, especially those commonly found in biopolymers. An illustrative example, highlighting the potential of this unusual and promising âdouble clickâ conjugation approach, was devoted to the radiolabelling of a biological relevant peptide.
我们合成了一种基于双磺酮苯支架的新型同官能团
交联剂。通过制备适用于肽[18F]标记的原始修复基团,证明了这种
生物连接试剂的潜在用途。这种标记策略的基础是,先通过环状开环作用对第一位素酮分子进行亲核
氟化,然后再通过
生物聚合物中的活性胺对第二位残余素酮进行亲核环状开环作用。除了一步完成
多肽的放射性标记外,这种策略的第二个主要优点是释放出游离的
磺酸分子,使目标[18F]标记磺化化合物与其非磺化前体的分离变得更容易、更快捷。通过对各种亲核物,尤其是
生物聚合物中常见的亲核物进行全面的反应性研究,首次报道了成功使用双磺酮分子作为多功能
生物共轭基团的情况。在对一种
生物相关
多肽进行放射性标记时,一个实例突出说明了这种不同寻常且前景广阔的 "双击 "共轭方法的潜力。