Six 3-methylpyridine zwitterions and six quinoline zwitterions were synthesized through the reaction of 4-hydroxycoumarins, p-benzoquinone and the corresponding N-aromatics. The novel pseudo-cyclic face-to-face rigid structure of the zwitterion was elucidated by 1H-NMR at different temperatures, and assumed to be caused by both the intramolecular ion pair attraction and the steric interaction.
通过
4-羟基
香豆素、
对苯醌和相应的 N-芳香族化合物的反应,合成了 6 个 3-
甲基吡啶齐聚物和 6 个
喹啉齐聚物。在不同温度下,通过 1H-NMR 方法阐明了新型伪环面刚性结构,并推测这是分子内离子对吸引和立体相互作用造成的。