Synthesis, crystal structures, fluorescence and xanthine oxidase inhibitory activity of pyrazole-based 1,3,4-oxadiazole derivatives
摘要:
A series of pyrazole-based 1,3,4-oxadiazole derivatives were rationally designed and synthesized in good yields by following a convenient route. All the newly synthesized molecules were fully characterized by IR, H-1 NMR and elemental analysis. Eight compounds were structurally determined by single crystal Xray diffraction analysis. The fluorescence properties of all the compounds were investigated in dimethyl sulfoxide media. In addition, these newly synthesized compounds were evaluated for in vitro inhibitory activity against commercial enzyme xanthine oxidase (XO) by measuring the formation of uric acid from xanthine. Among the compounds synthesized and tested, 3d and 3e were found to be moderate inhibitory activity against commercial XO with IC50 = 72.4 mu M and 75.6 mu M. The studies gave a new insight in further optimization of pyrazole-based 1,3,4-oxadiazole derivatives with excellent fluorescence properties and XO inhibitory activity. (C) 2015 Elsevier B.V. All rights reserved.
在氧氯化磷存在下,通过取代的吡唑-5-碳酰肼与取代的苯甲酸反应,合成了一系列新型的取代的吡唑基1,3,4-恶二唑衍生物。使用IR,1 H NMR和HRMS以及X射线衍射分析对化合物进行表征。在二氯甲烷中研究了化合物的吸收和荧光特性。这些化合物显示相似的吸收,范围为267至281 nm,在〜275 nm处出现很强的吸收带。吡唑基1,3,4-恶二唑衍生物的吸收光谱和荧光特性与对苯环的取代作用的相关性表明,连接在苯环上的甲氧基和溴基团显着影响最大发射。
The synthesis, characterization and optical properties of novel, substituted, pyrazoly 1,3,4-oxadiazole derivatives
作者:Hong-Shui Lv、Bao-Xiang Zhao、Ji-Kun Li、Yong Xia、Song Lian、Wei-Yong Liu、Zhong-Liang Gong
DOI:10.1016/j.dyepig.2009.11.003
日期:2010.6
A series of novel substituted pyrazoly 1,3,4-oxadiazole derivatives were synthesized by the reaction of substituted pyrazole-5-carbohydrazide with substituted benzoic acid in the presence of phosphorus oxychloride. The compounds were characterised using IR, 1H NMR and HRMS and X-ray diffraction analysis. The absorption and fluorescence characteristics of the compounds were investigated in dichloromethane
在氧氯化磷存在下,通过取代的吡唑-5-碳酰肼与取代的苯甲酸反应,合成了一系列新型的取代的吡唑基1,3,4-恶二唑衍生物。使用IR,1 H NMR和HRMS以及X射线衍射分析对化合物进行表征。在二氯甲烷中研究了化合物的吸收和荧光特性。这些化合物显示相似的吸收,范围为267至281 nm,在〜275 nm处出现很强的吸收带。吡唑基1,3,4-恶二唑衍生物的吸收光谱和荧光特性与对苯环的取代作用的相关性表明,连接在苯环上的甲氧基和溴基团显着影响最大发射。
Synthesis, X-ray crystal structure and optical properties of novel 5-(3-aryl-1H-pyrazol-5-yl)-2-(6-methoxy-3-methylbenzofuran-2-yl)-1,3,4-oxadiazole
position of benzene moiety. The maximum emission spectra of compounds in two different solvents were mainly dependent on groups in N-1 position of pyrazole moiety. The intensity of absorption and fluorescence was also correlated with substituents on the aryl ring bonded to pyrazole moiety. In addition, the absorption and emission spectra of these compounds change with increasing solventpolarity.
Synthesis, Crystal Structures, Fluorescence and Xanthine Oxidase Inhibitory of Sulfur-Containing Pyrazole Derivatives Incorporated with Oxadiazole and Triazole
GRAPHICAL ABSTRACT Abstract Some sulfur-containing pyrazolederivatives incorporated with 1,3,4-oxadiazole and 1,2,4-triazole were designed and synthesized. All the compounds were fully characterized by IR, 1H NMR, 13C NMR and elemental analyses. Two crystal structures were determined by single crystal X-ray diffraction analyses. The fluorescence properties were investigated in DMSO solution. In addition
图形摘要摘要设计并合成了一些与1,3,4-恶二唑和1,2,4-三唑结合的含硫吡唑衍生物。所有化合物均通过 IR、1H NMR、13C NMR 和元素分析进行了充分表征。通过单晶X射线衍射分析确定了两种晶体结构。在DMSO溶液中研究了荧光性质。此外,还评估了体外黄嘌呤氧化酶 (XO) 抑制活性,结果表明一种化合物显示出中等的 XO 抑制活性。
Synthesis and structure–activity relationships of novel 1-arylmethyl-3-aryl-1H-pyrazole-5-carbohydrazide hydrazone derivatives as potential agents against A549 lung cancer cells
A series of novel 1-arylmethyl-3-aryl-1H-pyrazole-5-carbohydrazide hydrazone derivatives were synthesized and the effects of all the compounds on A549 cell growth were investigated. The results showed that all compounds had almost inhibitory effects on the growth of A549 cells. The study on structure-activity relationships and prediction of lipophilicities of compounds showed that compounds with Log P values in the range of 4.12-6.80 had inhibitory effects on the growth of A549 cells, and among of them the hydrazone derived from salicylaldehyde had much more inhibitory effects. (C) 2008 Elsevier Masson SAS. All rights reserved.
Synthesis and structure–activity relationships of novel 1-arylmethyl-3-aryl-1H-pyrazole-5-carbohydrazide derivatives as potential agents against A549 lung cancer cells
A series of novel 1-arylmethyl-3-aryl- 1 H-pyrazole-5-carbohydrazide derivatives were synthesized, and the effects of all the compounds on A549 cell growth were investigated. The results showed that all the nine compounds had inhibitory effects on the growth of A549 cells and induced the cell apoptosis. The study on Structure-activity relationships and prediction of lipophilicities Of compounds showed that compounds with log P values in the range of 3.12-4.94 had more inhibitory effects oil the growth of A549 cells. (C) 2007 Elsevier Ltd. All rights reserved.