Nuclear magnetic resonance spectra of synthesized azo dyes derived from aniline derivatives in reaction with benzoylacetone and 4‐hydroxycoumarin were studied in both CDCl3 and (CD3)2SO (two drops of D2O were added into solutions of dyes). All dyes showed intramolecular hydrogen bonding. Dyes derived from o‐nitro aniline in the reaction with benzoylacetone, and 4‐hydroxycoumarin showed bifurcated intramolecular
在 CDCl3 和 (CD3)2SO(将两滴 D2O 加入
染料溶液)中,研究了衍生自
苯胺衍
生物的合成偶氮
染料与苯甲酰
丙酮和
4-羟基
香豆素反应的核磁共振光谱。所有
染料均显示分子内氢键。邻
硝基苯胺与苯甲酰
丙酮和
4-羟基
香豆素反应的
染料显示分叉的分子内氢键。在两滴 D2O 存在下检查了衍生自苯甲酰
丙酮和
4-羟基
香豆素的
染料的溶剂-底物质子交换。在十个
染料样品中,在相似条件下,两种源自苯甲酰
丙酮的
染料未显示
氘化,三种
染料显示部分
氘化,五种
染料显示完全
氘化。对于部分
氘化
染料,研究了 13C 分裂中的 β-同位素效应,并用于确定主要的互变异构形式。版权所有 © 2016 John Wiley & Sons, Ltd.