20893-72-5Relevant academic research and scientific papers
Novel azo dyes derived from 8-methyl-4-hydroxyl-2-quinolone: Synthesis, UV-vis studies and biological activity
Moradi Rufchahi,Pouramir,Yazdanbakhsh,Yousefi,Bagheri,Rassa
, p. 425 - 428 (2013)
In this study, N,N′-di-(2-methylphenyl)malonamide was synthesized and reacted with polyphosphoric acid to afford 8-methyl-4-hydroxyl-2-quinolone. Eight novel azo disperse dyes were then synthesized by linking diazotized p-substituted aniline derivatives w
Electrochemical investigations of some newly synthesized arylazapyrazole derivatives
Arshad, Nasima,Ikramullah,Aamir, Muhammad,Sher, Muhammad
, p. 245 - 255 (2017/02/10)
Abstract: Three derivatives of arylazapyrazole ((E)-4-(phenyldiazenyl)-3,5-dimethyl-1H-pyrazole, (E)-4-[(4-fluorophenyl)diazenyl]-3,5-dimethyl-1H-pyrazole, and (E)-4-[(4-iodophenyl)diazenyl]-3,5-dimethyl-1H-pyrazole) were synthesized, characterized, and further investigated for their electrochemical behavior at glassy carbon electrode using cyclic voltammetry. All compounds were reduced following Ei Ci mechanism giving single cathodic peak in potential range 0 to ?2?V vs. Ag/AgCl. The plots of log iP vs. log ν showed that the electrode process is mixed adsorption-diffusion controlled. The kinetic parameters such as transfer coefficient (αn), diffusion coefficients (Do), and standard heterogeneous rate constants (ks) were determined from the electrochemical data. The values of Do were determined and found greater for the smallest among the three compounds. ks values were calculated by Laviron formalism which lies in the order of 10?2?s?1. Temperature and pH effects were studied and thermodynamic parameters such as change in free energy of activation (ΔG#), apparent activation energy (Ea), enthalpy (ΔH#), and entropy (ΔS#) of activation were determined. Negative values of Ea, ΔH#, and ΔS# imply that the electrode process needs lesser over potential with temperature rise, pre-adsorption of the analyte onto the electrode surface and the activated complex has a more organized structure than the reactants, respectively. Graphical abstract: [Figure not available: see fulltext.]
PROCESS FOR THE SYNTHESIS OF ARYLDIAZONIUM SALTS USING NITROGEN OXIDES IN OXYGEN-CONTAINING GAS STREAMS, ESPECIALLY FROM INDUSTRIAL WASTE GASES
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Page/Page column 35; 36; 37; 38; 39, (2017/06/30)
The present invention relates to a process for the synthesis of aryldiazonium salts using nitrogen oxides in oxygen-containing gas streams, especially from industrial waste gases.
A general approach to substituted diphenyldiazenes
Lutz, Toni A.,Spanner, Patrick,Wanner, Klaus T.
, p. 1579 - 1589 (2016/03/01)
A general and practical synthetic method for the construction of unsymmetrically substituted diphenyldiazenes based on classical azo coupling reaction has been developed. A key feature of this method is the use of N,N-diallyl protected aniline derivatives
Two-Dimensional Core-Shelled Porous Hybrids as Highly Efficient Catalysts for the Oxygen Reduction Reaction
Yuan, Kai,Zhuang, Xiaodong,Fu, Haiyan,Brunklaus, Gunther,Forster, Michael,Chen, Yiwang,Feng, Xinliang,Scherf, Ullrich
supporting information, p. 6858 - 6863 (2016/06/13)
Two-dimensional (2D) transition-metal dichalcogenides (TMDs) have drawn much attention due to their unique physical and chemical properties. Using TMDs as templates for the generation of 2D sandwich-like materials with remarkable properties still remains
Synthesis, in vitro and in Silico studies of some novel 5-nitrofuran-2-yl hydrazones as antimicrobial and antitubercular agents
Abdel-Aziz, Hatem Abdel-Kader,Eldehna, Wagdy Mohamed,Fares, Mohamed,Elsaman, Tilal,Abdel-Aziz, Marwa Mostafa,Soliman, Dalia Hussein
, p. 1617 - 1630 (2015/11/24)
In this study, we synthesized two series of novel 5-nitrofuran-2-carbohydrazides 21a-h and 22a-e in addition to a third series of thiophene-2-carbohydrazides 23a-g to develop potent antimicrobial and/or antitubercular agents. The newly synthesized compounds were evaluated in vitro for their antimicrobial and antimycobacterial activities. Most of the 5-nitrofuran-2-carbohydrazides 21a-h and 22a-e displayed variable activity against Aspergillus fumigates, Staphylococcus aureus, Streptococcus pneumonia, Bacillis subtilis, Salmonella typhimurium, Klebsiella pneumonia, Escherichia coli and Mycobacterium tuberculosis. The sulfonamide derivative 21f exhibited superior potency and broad-spectrum antimicrobial activity with minimum inhibitory concentration (MIC)=0.06-0.98 μg/mL and antimycobacterial activity with MIC=3.9 μg/mL. The 5-nitrofuran-2-carbohydrazides 21a, b, g, h and 22a-c exhibited significant antibacterial activity with MIC values in the range of 0.12-7.81 μg/mL. The significances of the 5-nitrofuran moiety and sulfonamide function were explored via the structure-activity relationship (SAR) study. In addition, docking studies revealed that the p-amino benzoic acid (PABA) and binding pockets of the dihydropteroate synthase (DHPS) were successfully occupied by compound 21f. Furthermore, two quantitative structure-activity relationship (QSAR) models were built to explore the structural requirements which controlled the activity.
Reactions of 2-Arylhydrazones of 1,2,3-Triketones with 1,2-Diaminoethane. I. Synthesis and Spectral Characterization of 6-Arylazo-2,3-dihydro-1H-1,4-diazepines and 3,10-Diarylazo-4,9-dimethyl-5,8-diaza-3,9-dodecadiene-2,11-diones
Opozda, Ewa,Sledziewska, Ewa
, p. 601 - 606 (2007/10/02)
Reactions of 3-arylhydrazones of 2,3,4-pentanetrione (1a-1e) and 2-arylhydrazones of 1,3-diphenyl-1,2,3-propanetrione (1f-1l) with 1,2-diaminoethane have been studied.It was found, that 3-arylhydrazones of 2,3,4-pentanetrione react with 1,2-diaminoethane with formation of 6-arylazo-2,3-dihydro-1,4-diazepines (2a-2e) or the diarylazo derivatives of 4,9-dimethyl-5,8-diaza-3,9-dodecadiene-2,11-dione (3a-3e).Analogous reactions of 2-arylhydrazones of 1,3-diphenyl-1,2,3-propanetrione yielded exclusively the derivatives of dihydrodiazepine.The structure of obtained products has been elucidated on the basis of i.r., m.s. and 1H-n.m.r.spectra.
Substituent Effects on 13C and 15N Chemical Shifts in Triazenes Studied by Principal Components Multivariate Data Analysis
Dunn, III, W.J.,Lins, C.,Kumar, G.,Manimaran, T.,Grigoras, S.,et al.
, p. 450 - 456 (2007/10/02)
Principal components analysis was applied to the 13C and 15N chemical shift data on a series of fifteen 1-(para-substituted-phenyl)-3-acetyl-3-methyltriazenes.It was found that the halogen-substituted triazenes formed a class, based on substituent effects, which was different from the remaining eleven triazenes.A one-component model described the halogen class, whereas a two-component model was necessary for a description of the second class.In the second class, substituent tended to cluster to form groups depending on their electronic character.
