Synthesis and Photophysical Studies of New Fluorescent Indole Derivatives Obtained from β-Bromodehydroamino Acids â Interaction with Fluoride Anions
作者:Goreti Pereira、Elisabete M. S. Castanheira、Paula M. T. Ferreira、Maria-João R. P. Queiroz
DOI:10.1002/ejoc.200900737
日期:2010.1
Several new indole derivatives were synthesised from β-brominated dehydroamino acids and arylboronic acids by using a strategy developed in our research group that involves a sequential Suzuki-Miyaura cross-coupling reaction and a metal-assisted C―N intramolecular cyclisation. The cyclised products were obtained either by direct cyclisation or by isomerisation followed by cyclisation. The photophysical
通过使用我们研究小组开发的策略,包括顺序 Suzuki-Miyaura 交叉偶联反应和金属辅助的 C-N 分子内环化,从 β-溴化脱氢氨基酸和芳基硼酸合成了几种新的吲哚衍生物。环化产物通过直接环化或异构化后环化获得。在四种不同极性的溶剂(环己烷、乙醚、乙腈和乙醇)中研究了这些化合物的光物理性质。所有这些化合物都具有相当高的荧光量子产率(在 16% 到 85% 之间),并在其荧光发射中显示出不同的溶剂敏感性。这些结果表明制备的吲哚衍生物是荧光探针的良好候选者。评估了新合成化合物对氟离子 (F - ) 的响应。发现 3-甲基-1H-二苯并[e,g]吲哚-2-羧酸甲酯、3-(菲-9-基)-1H-二苯并[e,g]吲哚-2-羧酸甲酯和1 -(naphthalen-1-yl)-3H-benzo[e]indole-2-carboxylate 在添加 F-后,荧光发射的光谱发生显着变化,强度降低,并在更长