Two cholic acid (ChA) analogues, containing a 4-nitrobenzo-2-oxa-1,3-diazole (NBD) moiety at C-3, were incorporated into ChA aggregates and submitted to fluorescence quenching by the two enantiomers of several tryptophan derivatives. In all cases, a significant stereodifferentiation was observed; the most remarkable effect was found when comparing the 3α and the 3β diastereomers.
两种
胆酸(ChA)类似物的 C-3 位含有一个 4-
硝基苯并-2-氧杂-1,3-二唑(NBD)分子,它们被加入到 ChA 聚集体中,并被几种色
氨酸衍
生物的两种对映体淬灭荧光。在所有情况下,都观察到了明显的立体差异;在比较 3α 和 3β 非对映异构体时,发现了最显著的效果。