A carbonyl-selective fluorescence label 5 for the detection of oxidized groups has been synthesized by an expeditious three-step sequence. The fluorophore carbazole and the reactive aminoxy group, which binds to carbonyls as an oxime, were tethered by a diethylene glycol spacer. The label allows detection of minute amounts of oxidized functionalities in oligosaccharides and cellulosics under the relatively harsh conditions of GPC separation, without fluorescence interference with light scattering (MALLS) detection. Synthetic keto sugars have been used to optimize the derivatization reaction.
一种用于检测氧化基团的羰基选择性荧光标签 5 通过三步顺序快速合成。荧光团
咔唑和作为
肟与羰基结合的活性
氨基通过
二甘醇间隔物连接起来。这种标签可以在相对苛刻的
GPC 分离条件下检测低聚糖和
纤维素中微量的氧化官能团,而无需进行荧光干扰光散射(MALLS)检测。合成酮糖用于优化衍生反应。