Two C-nucleosides bearing small fluorescent groups as a base were synthesized by Heck-type coupling reaction and incorporated into DNA. They exhibited environment-sensitive fluorescence and opposite solvatochromic properties. The modified DNAs containing 3-aminobenzonitrile or 3-aminobenzoic acid retained the duplexes and their fluorescence reflected the microenvironment.

中文翻译：

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含有小荧光团，3-氨基苄腈或3-氨基苯甲酸的微环境敏感寡核苷酸的合成与性质

通过Heck型偶联反应合成了两个带有小的荧光基团的C-核苷，并掺入了DNA中。它们表现出对环境敏感的荧光和相反的溶剂变色性质。含有3-氨基苄腈或3-氨基苯甲酸的修饰DNA保留了双链体，其荧光反映了微环境。