在这项研究中,通过将取代的苯hydr化合物3a-3h与4-氯-2-苯氧基苯甲胺的重氮盐偶联反应,合成了甲5 5a-5h(4)。取代的苯肼3a–3h是由取代的苯肼1a–1h与4-甲氧基苯甲醛的缩合反应制得的(2)。通过元素分析,FTIR,1 H NMR,13 C NMR,LC-MS和化合物5e的晶体结构对甲maz的结构进行表征通过X射线晶体学测定。在各种溶剂中研究了所有化合物的吸收光谱。尽管它们的吸收带仅稍微取决于溶剂的极性,但是通过改变取代基的电子特性观察到了显着变化。还研究了DMSO中化合物5a-5h的荧光量子产率特性和斯托克斯位移。通过CV测量研究了新产品的电化学性能。此外,在PBE1PBE / 6-311g(2d,2p)水平上进行了计算研究,以阐明可能的互变异构体和分子内H键的结构。
The use of enaminones and enamines as effective synthons for MSA-catalyzed regioselective synthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles
In the present work, an efficient regioselectivesynthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles via a methanesulfonic acid (MSA)-catalyzed reaction of hydrazones with enaminones or enamines is reported. Mechanistically, the formation of the title compounds involves the [2+3] cycloaddition of hydrazones with enaminones or enamines followed by aromatization with acid and oxygen. This
Novel formazan derivatives containing phenylsulfanyl and carbonyl units: synthesis, optical and electrochemical properties
作者:Gulsen Turkoglu、Halil Berber
DOI:10.1039/c6ra23008c
日期:——
A series of phenylsulfanyl and aryl carbonyl containing formazan derivatives 4a–4h and 5a–5h were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 2-(phenylthio)benzenamine and 5-chloro-2-benzoylbenzenamine in pyridine. The electronic properties of the new formazans were studied by cyclic voltammetry and UV-vis spectroscopy. Fluorescence emission wavelengths were measured
Broad‐Spectrum Antifungal Agents: Fluorinated Aryl‐ and Heteroaryl‐Substituted Hydrazones
作者:Nishad Thamban Chandrika、Emily K. Dennis、Katelyn R. Brubaker、Stefan Kwiatkowski、David S. Watt、Sylvie Garneau‐Tsodikova
DOI:10.1002/cmdc.202000626
日期:2021.1.8
Fluorinated aryl‐ and heteroaryl‐substituted monohydrazones displayed excellent broad‐spectrum activity against various fungal strains, including a panel of clinically relevant Candida auris strains relative to a control antifungal agent, voriconazole (VRC). These monohydrazones displayed less hemolysis of murine red blood cells than that of VRC at the same concentrations, possessed fungicidal activity
氟化芳基和杂芳基取代的单腙对各种真菌菌株表现出优异的广谱活性,包括相对于对照抗真菌剂伏立康唑 (VRC) 的一组临床相关耳念珠菌菌株。在相同浓度下,这些一腙对小鼠红细胞的溶血作用比 VRC 少,在时间杀灭研究中具有杀菌活性,并且没有表现出哺乳动物细胞的细胞毒性。此外,这些一腙可以防止生物膜的形成,否则会阻碍抗生素的有效性,并且当暴露于耳念珠菌AR Bank # 0390 15 代以上时,不会引发耐药性的发展。
Parallel Synthesis of Pyrazolineson Soluble Polymer Support
An efficient and rapid parallel liquid-phasesynthesis of pyrazolines has been developed. The one-pot three-components reaction of polyethyleneglycol (PEG)-supported acrylate 1, aldehyde 2 and aryl hydrazine 3 in the presence of chloramine-T in methanol gave the corresponding PEG-supported pyrazolines 5. Cleavage from the support under mild conditions afforded pyrazolines 6 in good yields (69-91%)