Synthesis and tautomerism of 2-phenacyl-1H-benzimidazoles and their hydrogen bromide salts
作者:I. B. Dzvinchuk、A. M. Nesterenko、V. V. Polovinko、A. B. Ryabitskii、M. O. Lozinskii
DOI:10.1007/s10593-011-0860-7
日期:2011.11
spectroscopy as well as by quantum-chemical calculations. 2-Phenacyl-1H-benzimidazoles in DMSO-d6 solution were found to display predominantly imino-enamino tautomerism, while their salts were found to display predominantly keto-enol tautomerism.
通过使用芳酰氯对2-甲基苯并咪唑进行酰化反应,然后醇解或对得到的N,C,O-三酰化产物进行氨解反应,可以制备2-Phenacyl-1 H -benzimidazoles。用氢溴酸处理2-苯甲酰基-1 H-苯并咪唑,得到相应的盐。产物的结构得到IR,1 H和13 C NMR,HMBC光谱以及量子化学计算的支持。发现在DMSO-d 6溶液中的2-苯甲酰基-1 H-苯并咪唑主要显示亚氨基-烯氨基互变异构,而发现它们的盐则主要显示酮-烯醇互变异构。