Synthesis and study of prototropic tautomerism of 2-(3-chromenyl)-1-hydroxyimidazoles
作者:Polina A. Nikitina、Ludmila G. Kuz'mina、Valery P. Perevalov、Iosif I. Tkach
DOI:10.1016/j.tet.2013.02.039
日期:2013.4
has been synthesized. A characteristic response of the chromenyl ring H-2 proton to its environment allows the study of the prototropic tautomerism of novel 1-hydroxyimidazoles in solution using 1H NMR spectroscopy. It has been shown that the predominance of one or another tautomer depends on the nature of the substituents of the imidazole ring, and the proton-donating/proton-withdrawing properties of
已经合成了一系列在环的2位上含有苯二甲基部分的咪唑的新型衍生物。 色烯环H-2质子对其环境的特征响应允许使用1 H NMR光谱研究溶液中新型1-羟基咪唑的质子互变异构。已经表明一种或另一种互变异构体的优势取决于咪唑环的取代基的性质以及溶剂的质子给体/质子吸收性质。 两种化合物的X射线衍射数据表明,这些1-羟基咪唑衍生物在固态下以N-氧化物互变异构体的形式存在。