Synthesis of solvatofluorochromic 7-arylethynylated 7-deaza-2′-deoxyadenosine derivatives: application to the design of environmentally sensitive fluorescent probes forming stable DNA duplexes
作者:Azusa Suzuki、Kohki Kimura、Shinya Ishioroshi、Isao Saito、Nobukatsu Nemoto、Yoshio Saito
DOI:10.1016/j.tetlet.2013.02.063
日期:2013.5
We synthesized environmentally sensitive fluorescent (ESF) 7-deaza-2'-deoxyadenosine derivatives including ethynylanthracene substituted (atz)A (1) and ethynylnaphthalene substituted (nz)A (2a), (cnz)A (2b), (anz)A (2c), and (dnz)A (2d), and investigated their photophysical properties. Among them, only push-pull type cyano- and acetyl-substituted naphthylethynylated 7-deaza-2'-deoxyadenosine, (cnz)A (2b) and (anz)A (2c), exhibited remarkable solvatofluorochromic properties (Delta lambda = 71 and 63 nm, respectively). We incorporated non-solvatofluorochromic (atz)A (1) and solvatofluorochromic (cnz)A (2b) into oligodeoxynucleotides and found that (cnz)A (2b) forms a stable base pair with both thymine and cytosine, being accompanied by a change of fluorescence intensity. Such ESF nucleosides can be used for studying structures and functions of nucleic acids. (C) 2013 Elsevier Ltd. All rights reserved.