Fluorescence Properties of 2-Substituted 6-, 7- or 8-Methoxyquinoline-4-carboxylic Acid Derivatives.
作者:Tomohiko YOSHIDA、Youichi MORIYAMA、Saburo NAKANO
DOI:10.1248/cpb.40.1322
日期:——
2-Substituted 6-, 7- or 8-methoxyquinoline-4-carboxylic acid derivatives were synthesized. The fluorescence quantum yield (Φ) of these compounds increased in the order, 2-thioxo-, 2-methylthio-, 2-methylsulfinyl-, 2-methylsulfonyl derivatives of 6-methoxyquinoline-4-carboxylic acid. Ethyl 6-methoxy-2-methylsulfonylquinoline-4-carboxylate (ΦCH3CN=0.74 or ΦEtOH=0.69) showed a much higher fluorescence quantum yield than those (ΦCH3CN=0.19 or ΦEtOH=0.19 and ΦCH3CN=0.16 or ΦEtOH=0.05) of the 7- and 8-methoxy derivatives in both acetonitrile and ethanol.
合成了 2-取代型 6-、7-或 8-甲氧基喹啉-4-羧酸衍生物。这些化合物的荧光量子产率(Φ)按照 6-甲氧基喹啉-4-羧酸的 2-硫酮-、2-甲硫基-、2-甲磺酰基-、2-甲磺酰基衍生物的顺序增加。在乙腈和乙醇中,6-甲氧基-2-甲磺酰基喹啉-4-羧酸乙酯(ΦCH3CN=0.74 或 ΦEtOH=0.69)的荧光量子产率远高于 7-和 8-甲氧基衍生物(ΦCH3CN=0.19 或 ΦEtOH=0.19,ΦCH3CN=0.16 或 ΦEtOH=0.05)。