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Kinetics Studies on the Hydrolysis Reactions of N-Heteroaryl-4(5)-nitroimidazoles

机译:N-杂芳基-4(5)-硝基咪唑水解反应的动力学研究

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摘要

There is little study on the hydrolysis reactions of N-heteroarylimidazole derivatives in comparison with those of N-acylimidazoles.Some years ago,we reported the hydrolysis reactions of N-heteroaryl-2-phenylimidazoles,N-furoyl-2-phenylimidazole and N-thenoyl-2-phenylimida-zole.In the hydrolysis reactions of these compounds,we found a change of the rate determining step in acidic regions.These results are very unique even though the feature of hydrolysis reactivity of N-acylimidazole derivatives depends on the structure of N-acylimidazole.But,when one changes the acyl group with the heteroaryl group to the benzoyl group having same leaving group,the pH rate profile for the hydrolysis reaction of N-benzoyl-2-phenyl-imidazole observed to be related with the diprotonated species of the substrate in acidic region.
机译:与N-酰基咪唑相比,对N-杂芳基咪唑衍生物的水解反应的研究很少。几年前,我们报道了N-杂芳基-2-苯基咪唑,N-呋喃基-2-苯基咪唑和N-的水解反应。在这些化合物的水解反应中,我们发现了在酸性区域速率决定步骤的变化。尽管N-酰基咪唑衍生物的水解反应特性取决于结构,但这些结果还是非常独特的。但是,当将具有杂芳基的酰基改变为具有相同离去基团的苯甲酰基时,观察到N-苯甲酰基-2-苯基-咪唑的水解反应的pH速率分布与底物在酸性区域的双质子化物种。

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