Nucleoside and oligonucleotide pyrene conjugates with 1,2,3-triazolyl or ethynyl linkers: synthesis, duplex stability, and fluorescence changes generated by the DNA-dye connector
作者:Sachin A. Ingale、Frank Seela
DOI:10.1016/j.tet.2013.11.048
日期:2014.1
conjugates (9, 14, 25) were prepared and used in solid-phase synthesis. Short linkers (2, 4) destabilize DNA, while long linkers (1) increased duplex stability. Nucleosides and oligonucleotides with single dye incorporations show linker dependent fluorescence. Linker dependent excimer emission with pyrenes in proximal positions was also observed. A ‘superchromophore’ formed by the 7-deaza-2′-deoxyguanosine ethynylpyrene
使用“点击”化学或Sonogashira交叉偶联反应合成了被pyr官能化的荧光核苷和寡核苷酸。该染料连接到7-脱氮基2'-脱氧鸟苷的7位或2'-脱氧核糖呋喃糖部分。构建了具有1,2,3-三唑基残基或三键的四个不同的DNA染料连接器。芘缀合物(的亚磷酰胺9,14,25)中制备并在固相合成中使用。短接头(2,4)叫板DNA,而长的接头(1)提高了双工稳定性。具有单一染料掺入的核苷和寡核苷酸显示接头依赖性荧光。还观察到在近端带有with的连接子依赖性准分子发射。由7-脱氮基2'-脱氧鸟苷乙炔基py共轭物形成的“超生色团”在495 nm处显示出强烈的红移荧光发射。