New Cross-Linking Quinoline and Quinolone Derivatives for Sensitive Fluorescent Labeling
作者:Shyamala Pillai、Maxim Kozlov、Salvatore A. E. Marras、Lev N. Krasnoperov、Arkady Mustaev
DOI:10.1007/s10895-012-1039-z
日期:2012.7
A variety of contemporary analytical platforms, utilized in technical and biological applications, take advantage of labeling the objects of interest with fluorescent tracers—compounds that can be easily and sensitively detected. Here we describe the synthesis of new fluorescent quinoline and quinolone compounds, whose light emission can be conveniently tuned by simple structural modifications. Some of these compounds can be used as sensitizers for lanthanide emission in design of highly sensitive luminescent probes. In addition, we also describe simple efficient derivatization reactions that allow introduction of amine- or click-reactive cross-linking groups into the fluorophores. The reactivity of synthesized compounds was confirmed in reactions with low molecular weight nucleophiles, or alkynes, as well as with click-reactive DNA-oligonucleotide containing synthetically introduced alkyne groups. These reactive derivatives can be used for covalent attachment of the fluorophores to various biomolecules of interest including nucleic acids, proteins, living cells and small cellular metabolites. Obtained compounds are characterized using NMR, steady-state fluorescence spectroscopy as well as UV absorption spectroscopy.
多种现代分析平台,在技术和生物应用中,利用了用荧光示踪剂标记感兴趣物体的方法——这些化合物可以被轻松且敏感地检测到。在这里,我们描述了新型荧光喹啉和喹诺酮化合物的合成,其光发射可以通过简单的结构修饰方便地调节。其中一些化合物可用作镧系发射的敏化剂,用于设计高灵敏度发光探针。此外,我们还描述了简单的有效衍生化反应,允许将胺或点击反应性交联基团引入荧光团。合成化合物与低分子量亲核试剂或炔烃以及带有人工引入的炔基的点击反应性DNA-寡核苷酸的反应证实了其反应性。这些反应性衍生物可用于将荧光团共价结合到各种感兴趣的生物分子,包括核酸、蛋白质、活细胞和小细胞代谢物。所得化合物通过NMR、稳态荧光光谱学以及UV吸收光谱学进行表征。