Structural characterization of benzoyl-1H-pyrazole derivatives obtained in lemon juice medium: Experimental and theoretical approach
作者:Vesna Milovanović、Zorica D. Petrović、Slađana Novaković、Goran A. Bogdanović、Dušica Simijonović、Vladimir P. Petrović
DOI:10.1016/j.molstruc.2019.05.095
日期:2019.11
Abstract Simple, one-pot, and low-cost reactions of acetylacetone with a variety of substituted benzoyl hydrazides in lemon juice, as eco-friendly medium, were performed. In reactions of benzoyl hydrazides with electron-donating groups on phenyl ring, the 1-benzoyl-1H-pyrazole derivatives were obtained in short reaction time, and in good to high yields. On the other hand, benzoyl hydrazides with electron-withdrawing
摘要 作为环保介质,在柠檬汁中进行了乙酰丙酮与多种取代苯甲酰肼的简单、一锅法和低成本反应。在苯环上带有给电子基团的苯甲酰肼反应中,1-苯甲酰-1H-吡唑衍生物反应时间短,产率高。另一方面,具有吸电子基团的苯甲酰肼反应较慢,产生 1-苯甲酰-5-羟基-4,5-二氢-1H-吡唑和苯甲酰-1H-吡唑衍生物的混合物。值得指出的是,(2-氯苯基)(4,5-二氢-5-羟基-3,5-二甲基吡唑-1-基)甲酮和(4-碘苯基)(3,5-二甲基-1H -吡唑-1-基)甲酮是本文首次报道。所有获得的化合物均使用 IR、UV-Vis 和 NMR 进行表征,实验和理论以及熔点。实现了实验和模拟 IR、UV-Vis、1H 和 13C NMR 光谱之间的良好一致性。此外,还报告了 (4,5-二氢-5-羟基-3,5-二甲基吡唑-1-基)(4-碘苯基) 甲酮的晶体结构和 Hirshfeld 表面分析。