申请人:——
公开号:US20040054195A1
公开(公告)日:2004-03-18
Secondary amide xanthene derivatives, termed “xanthamides”, and other xanthene derivatives, are obtained in one form as fluorescent dyes which can have much higher photostability than related dyes such as fluorescein and BODIPY-FL. Examples are presented in which the synthesis begins with 5-carboxyfluorescein, an inexpensive reagent. Related carboxyxanthenes employed in other dyes such as rhodamines can also be used as starting materials. Simple synthetic steps yield compounds which exemplify this invention. Other notable properties of the xanthamide dyes include the option of pH-independent fluorescence, and the ease of controlling their functional and other groups. This means that a diversity of xanthamide and related xanthene dyes can be prepared with a broad variation of physicochemical properties to enhance the usefulness of fluorescence in biological and chemical analysis, and in other areas. In a second form xanthamides are formed which can be used as precursors of xanthamide dyes, especially as indicators or quenchers of reactive oxygen or free radical species.
二级酰胺黄素衍生物,称为“黄酰胺”,以及其他黄素衍生物,以一种形式获得,作为荧光染料,其光稳定性可以比相关染料如荧光素和BODIPY-FL高得多。其中一些示例是以5-羧基荧光素开始合成的,这是一种廉价试剂。其他用于制备其他染料(如罗丹明)的相关羧基黄素也可以用作起始材料。简单的合成步骤产生了代表这种发明的化合物。黄酰胺染料的其他显着特性包括无pH依赖性荧光的选择,以及控制其功能和其他基团的易于性。这意味着可以准备各种具有广泛物理化学性质变化的黄酰胺和相关黄素染料,以增强在生物和化学分析以及其他领域中荧光的有用性。在第二种形式中,形成了可以用作黄酰胺染料的前体的黄酰胺,特别是作为反应性氧或自由基物种的指示剂或猝灭剂。