Cu-catalyzed 1,3-dipolar cycloaddition of ethyl 2-azidoacetate to iodobuta-1,3-diynes and subsequent Sonogashira cross-coupling were used to synthesize a large series of new triazole-based push–pull chromophores: 4,5-bis(arylethynyl)-1H-1,2,3-triazoles. The study of their optical properties revealed that all molecules have fluorescence properties, the Stokes shift values of which exceed 150 nm. The fluorescent properties of triazoles are easily adjustable depending on the nature of the substituents attached to aryl rings of the arylethynyl moieties at the C4 and C5 atoms of the triazole core. The possibility of 4,5-bis(arylethynyl)-1,2,3-triazoles’ application for labeling was demonstrated using proteins and the HEK293 cell line. The results of an MTT test on two distinct cell lines, HEK293 and HeLa, revealed the low cytotoxicity of 4,5-bis(arylethynyl)triazoles, which makes them promising fluorescent tags for labeling and tracking biomolecules.
使用Cu催化剂的乙基2-
叠氮基
乙酸酯与
碘代丁-1,3-二炔的1,3-偶极环加成反应和随后的Sonogashira交叉偶联反应,用于合成一系列新的三唑基推-拉式色团:4,5-双(芳基
乙炔基)-
1H-1,2,3-三唑。对它们的光学性质的研究表明,所有分子都具有荧光性质,其斯托克斯位移值超过150 nm。三唑的荧光性质可以根据连接在三唑核的C4和C5原子的芳基
乙炔基的芳香环上的取代基的性质进行容易调节。使用蛋白质和HEK293
细胞系证明了4,5-双(芳基
乙炔基)-
1,2,3-三唑的标记应用的可能性。对两种不同
细胞系HEK293和HeLa的M
TT测试结果表明,4,5-双(芳基
乙炔基)三唑的细胞毒性较低,使它们成为有前途的荧光标记物,用于标记和跟踪
生物分子。