Synthesis of Responsive Fluorescent Nucleobases 7-(Benzofuran-2-yl)-7-deazahypoxanthine and 7-(Benzofuran-2-yl)-7-deazaguanine Using Cross-coupling Reaction
作者:Munefumi Tokugawa、Kazuhei Kaneko、Masanori Saito、Takashi Kanamori、Yoshiaki Masaki、Akihiro Ohkubo、Mitsuo Sekine、Kohji Seio
DOI:10.1246/cl.140879
日期:2015.1.5
In order to develop fluorescent guanine analogs having substitutions at the 7-positions, 7-(benzofuran-2-yl)-7-deazahypoxanthine (1a) and 7-(benzofuran-2-yl)-7-deazaguanine (1b), were synthesized from 7-deaza-7-iodohypoxanthine and 7-deaza-7-iodo-2-N-pivaloylguanine via a Suzuki–Miyaura cross-coupling, respectively. Compound 1b showed strong fluorescence, with higher fluorescent quantum yields in less polar solvents; meanwhile, 1a showed higher activity in more polar solvents. It is expected that the guanine analogs can be incorporated into nucleosides to develop new fluorescent oligonucleotides.
为了开发在 7 位上进行取代的荧光鸟嘌呤类似物,研究人员通过铃木-米亚乌拉(Suzuki-Miyaura)交叉偶联法,分别从 7-deaza-7-iodohpoxanthine 和 7-deaza-7-iodo-2-N-pivaloylguanine合成了 7-(苯并呋喃-2-基)-7-deazahypoxanthine(1a)和 7-(苯并呋喃-2-基)-7-deazaguanine(1b)。化合物 1b 显示出较强的荧光,在极性较低的溶剂中具有较高的荧光量子产率;同时,1a 在极性较高的溶剂中显示出较高的活性。预计这些鸟嘌呤类似物可与核苷结合,开发出新的荧光寡核苷酸。