A ‘clicked’ macrocyclic probe incorporating Binol as the signalling unit for the chiroptical sensing of anions
作者:Marco Caricato、Alessandro Olmo、Claudia Gargiulli、Giuseppe Gattuso、Dario Pasini
DOI:10.1016/j.tet.2012.07.038
日期:2012.9
detection of halide anions, with the Binol moiety acting as the CD signalling unit. The macrocycle is conveniently synthesized using CuAAC ‘click’ reactions in the cyclization step; this methodology installs 1,2,3-triazole moieties within the macrocyclic backbone, able to directionally bind anions by means of CH⋯X– hydrogen bonds. 1H NMR complexation studies in CDCl3 reveal weak binding to halide and aliphatic
我们描述了一种用于检测卤化物阴离子的大环手性传感器,其中Binol部分充当CD信号单元。在环化步骤中,使用CuAAC“点击”反应可方便地合成大环;这种方法在大环骨架中安装了1,2,3-三唑部分,能够通过CH⋯X –氢键定向结合阴离子。CDCl 3中的1 H NMR络合研究表明与卤化物和脂肪族羧酸根阴离子的结合较弱。但是,卤化物阴离子保留在大环腔中时,能够触发大的手性反应,该反应来自与Binol部分的空间相互作用,从而改变了其二面角,从而调节了其特征性CD标记。