Three novel 4,7-bis(n-pyridylethynyl)-2,1,3-benzothiadiazoles (n = 2, 3, and 4) were synthesized by using the Sonogashira cross-coupling reaction of 4,7-dibromo-2,1,3-benzothiadiazole with the corresponding ethynylpyridines in the presence of a Pd(II) catalyst. The viologen analogues were also prepared by methylation of pyridyl nitrogen atoms. X-raystructure analysis of these compounds revealed the
New Sensitive Fluorophores for Selective DNA Detection
作者:Brenno A. D. Neto、Alexandre A. M. Lapis、Fabiana S. Mancilha、Igor B. Vasconcelos、Caroline Thum、Luiz A. Basso、Diógenes S. Santos、Jaïrton Dupont
DOI:10.1021/ol701708y
日期:2007.9.1
4,7-Disubstituted benzothiadiazoles containing 1-arylethynyl and 4-methoxyphenyl groups are selective photoluminescent "light up" probes to duplex DNA with unprecedented sensibility in both spectrophotometric and spectrofluorimetric measurements.