设计并通过一锅多组分反应合成了5-氨基3-苯基-1-(2,4,6-三氯苯基)-1 H-噻吩并[3,2 - c ]吡唑-6-腈(2)。化合物2与不同的试剂反应,得到具有噻吩并吡唑骨架的新的缩合部分。通过使用环境友好的技术(如微波辐射,超声辐射和球磨)制备这些化合物。通过光谱方法阐明了所制备化合物的结构。对新化合物的体外抗菌和抗真菌潜力进行了评估。
Multicomponent reactions of 1,3-disubstituted 5-pyrazolones and formaldehyde in environmentally benign solvent systems and their variations with more fundamental substrates
作者:Jia-Neng Tan、Minghao Li、Yanlong Gu
DOI:10.1039/b924699a
日期:——
Many multicomponentreactions (MCRs) of 1,3-disubstituted 5-pyrazolones and formaldehyde were developed in environmentally benign solvent systems. Styrenes, vinylferrocene and 2-phenylindoles could easily react, under solvent-free conditions or in glycerol solvent, with 1,3-disubstituted 5-pyrazolones and paraformaldehyde in the absence of any catalyst to afford a variety of complex skeletons in moderate
Design, synthesis of new magenta dyestuffs based on thiazole azomethine disperse reactive dyes with antibacterial potential on both dyes and gamma-irradiated dyed fabric
作者:Seham A. Ibrahim、Hala F. Rizk、Dina S. Aboul-Magd、Ahmed Ragab
DOI:10.1016/j.dyepig.2021.109504
日期:2021.9
high ultraviolet protection. The advantage of synthesizing these dyes is quite facile, and scale-up is feasible, preferring industrial dyeing applications. The designedthiazole azomethine dyes exhibited broad-spectrum antibacterial agents against MDR Gram-positive and Gram-negative bacterial isolates, which will facilitate their rational usage in multiple therapeutic applications. Our findings also demonstrate
合成了一系列新型洋红色偶氮甲碱活性分散染料并应用于涤棉混纺织物。各种光谱和分析技术表征了所有合成的染料。所有合成分子的所得数据和理论值与所提出的分子结构非常吻合。这些染料已证明它们在染色混纺织物方面的效率,因为它们在牢度特性、比色数据和吸尽、固色研究方面都取得了令人满意的结果。此外,染色织物进行了紫外线防护系数测试,并提供了高紫外线防护。合成这些染料的优点是非常容易,并且规模化是可行的,更适合工业染色应用。设计的噻唑偶氮甲碱染料对 MDR 革兰氏阳性和革兰氏阴性细菌分离株具有广谱抗菌作用,这将有助于它们在多种治疗应用中的合理使用。我们的研究结果还证明了使用伽马辐射对染色织物进行消毒的可能性以及辐射增强其抗菌活性的能力,从而抑制纺织品表面的任何细菌生长。分子对接研究表明,染料与 DNA 促旋酶的活性位点 (2XCT) 之间具有良好的结合作为首选模式。我们的研究结果还证明了使用伽马辐射对染色织
Efficient di-bromination of 5-pyrazolones and 5-hydroxypyrazoles by N-bromobenzamide
An efficient and convenient method for the bromination of pyrazolones and 5-hydroxypyrazoles was developed by using N-bromobenzamide in THF at room temperature. This new method provided di-bromimated pyrazolones in excellent yields (>= 90%). Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved
Novel Vilsmeier-type methylenation for synthesis of dipyrazolylmethane derivatives using formamide or N-methylformamide
作者:Fung Fuh Wong、Yu-Ying Huang
DOI:10.1016/j.tet.2011.03.089
日期:2011.5
A novel Vilsmeier-type methylenation for synthesis of dipyrazolylmethanes was developed by reacting pyrazolones with formamide or N-methylformamide in the presence of phosphorous oxychloride POCl3 coupling agent. This method can efficiently provide a series of dipyrazolylmethane derivatives as the main products in excellent yields without the formylated products. Our experimental result was different with the classical Vilsmeier-type reaction. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
Palladium-catalyzed dehalogenation of 5-halopyrazoles
作者:Chun-Yen Chen、Yu-Ying Huang、Wei-Nien Su、Kimiyoshi Kaneko、Masayuki Kimura、Hiroyuki Takayama、Fung Fuh Wong
DOI:10.1002/jhet.845
日期:2012.1
AbstractA new and efficient method for the dehalogenation of 5‐halopyrazoles was developed by using the catalytic amount of palladium (II) chloride and triphenylphosphine as a ligand at reflux under constant flow of hydrogen gas. The reaction gave the corresponding pyrazole products in good to excellent yields (≥83%). J. Heterocyclic Chem., (2012).