Relevant bibliographies by topics / Arylazo

Academic literature on the topic 'Arylazo'

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Published: 18 May 2024

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Journal articles on the topic "Arylazo"

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Luk'yanov, O. A., T. G. Mel'nikova, and Yu A. Strelenko. "Arylazo- and arylazoxy-N-nitroformamidines." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 40, no. 5 (May 1991): 997–1002. http://dx.doi.org/10.1007/bf00961362.

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LUK'YANOV, O. A., T. G. MEL'NIKOVA, and YU A. STRELENKO. "ChemInform Abstract: Arylazo- and Arylazoxy-N-nitroformamidines." ChemInform 23, no. 50 (September 1, 2010): no. http://dx.doi.org/10.1002/chin.199250140.

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Dushenko, G. A., I. E. Mikhailov, and V. I. Minkin. "Circumambulatory migrations of arylazo groups in the systems of pentamethoxycarbonyland pentamethylcyclopentadiene." Журнал органической химии 59, no. 9 (September 15, 2023): 1193–208. http://dx.doi.org/10.31857/s0514749223090094.

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According to quantum chemical calculations CAM-B3LYP/6-311++G(d,p) intramolecular migrations of arylazo groups in 5-arylazo-1,2,3,4,5-pentamethoxycarbonylcyclopentadienes occur by a dissociative mechanism through the intermediate formation of tight ionic pairs with low energy barriers: Δ E ≠ZPE, benzonitrile, 14.0 (Ar = C6H4NO2-4) and 16.5 [Ar = C6H3(NO2)2-2,4] kcal/mol. In 5-arylazo-1,2,3,4,5-pentamethylcyclopentadienes, 1,5-sigmatropic shifts of arylazo groups occur along the perimeter of the five-membered ring in conformers with the exo position of the azo group relative to the cyclopentadiene ring with significantly higher activation barriers: Δ E ≠ZPE, benzonitrile, 30.3 (Ar = C6H4NO2-4) and 27.5 [Ar = C6H3(NO2)2-2,4] kcal/mol. The calculations are in good agreement with the data for these compounds obtained by us earlier by dynamic NMR.
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Mijin, Dusan, Gordana Uscumlic, Natasa Valentic, and Aleksandar Marinkovic. "Synthesis of azo pyridone dyes." Chemical Industry 65, no. 5 (2011): 517–32. http://dx.doi.org/10.2298/hemind110428037m.

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Over 50% of all colorants which are used nowdays are azo dyes and pigments, and among them arylazo pyridone dyes (and pigments) have became of interest in last several decades due to the high molar extinction coefficient, and the medium to high light and wet fastness properties. They find application generally as disperse dyes. The importance of disperse dyes increased in the 1970s and 1980s due to the use of polyester and nylon as the main synthetic fibers. Also, disperse dyes were used rapidly since 1970 in inks for the heat-transfer printing of polyester. The main synthetic route for the preparation of azo dyes is coupling reaction between an aromatic diazo compound and a coupling component. Of all dyes manufactured, about 60% are produced by this reaction. Arylazo pyridone dyes can be prepared from pyridone moiety as a coupling component, where substituent can be on nitrogen, and diazonim salts which can be derived from different substituted anilines or other heterocyclic derivatives. In addition, arylazo dyes containing pyridone ring can be prepared from arylazo diketones or arylazo ketoesters (obtained by coupling ?-diketones or ?-ketoesters with diazonim salts) by condensation with cyanoacetamide. Disazo dyes can be prepared by tetrazotizing a dianiline and coupling it with a pyridone or by diazotizing aniline and coupling it with a dipyridone. Trisazo dyes can be also prepared by diazotizing of aniline and coupling it with a tripyridone or by hexazotizing a trianiline and coupling it with a pyridone. The main goal of this paper is to give a brief review on the synthesis of arylazo pyridone dyes due to the lack of such reviews. In addition, some properties of arylazo pyridone dyes as light fastness and azo-hydrazon tautomerism are disccused.
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Heindl, Andreas H., and Hermann A. Wegner. "Starazo triple switches – synthesis of unsymmetrical 1,3,5-tris(arylazo)benzenes." Beilstein Journal of Organic Chemistry 16 (January 3, 2020): 22–31. http://dx.doi.org/10.3762/bjoc.16.4.

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Multistate switches allow to drastically increase the information storage capacity and complexity of smart materials. In this context, unsymmetrical 1,3,5-tris(arylazo)benzenes – ‘starazos’ – which merge three photoswitches on one benzene ring, were successfully prepared. Two different synthetic strategies, one based on Baeyer–Mills reactions and the other based on Pd-catalyzed coupling reactions of arylhydrazides and aryl halides, followed by oxidation, were investigated. The Pd-catalyzed route efficiently led to the target compounds, unsymmetrical tris(arylazo)benzenes. These triple switches were preliminarily characterized in terms of their isomerization behavior using UV–vis and 1H NMR spectroscopy. The efficient synthesis of this new class of unsymmetrical tris(arylazo)benzenes opened new avenues to novel multistate switching materials.
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DUSHENKO, G. A., I. E. MIKHAILOV, R. V. SKACHKOV, A. A. KLENKIN, L. N. DIVAEVA, and V. I. MINKIN. "ChemInform Abstract: Stable 5-Arylazo-1,2,3,4,5-pentamethoxycarbonylcyclopentadienes - Effective Arylazo Group Transmitter." ChemInform 26, no. 28 (August 17, 2010): no. http://dx.doi.org/10.1002/chin.199528084.

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Elnagdi, Mohamed Hilmy, Nadia Hassen Taha, Fatma Abdel Maksoud Abd El All, Ramadan Maawad Abdel-Motaleb, and Fivian Farouk Mahmoud. "Studies on condensed pyrazoles: Synthesis of new methyl and amino pyrazolo[1,5-a]pyrimidines and of pyrazolo[5,1-c][1,2,4]triazines." Collection of Czechoslovak Chemical Communications 54, no. 4 (1989): 1082–91. http://dx.doi.org/10.1135/cccc19891082.

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A variety of 3-arylazo 5-amino and 7-aminopyrazolo[1,5-a]pyrimidines were obtained via reacting Ia-Id with cinnamonitriles. The structure of products was confirmed via 1H NMR. Both 5-amino- and 7-amino-3-arylazo pyrazolo[1,5-a]pyrimidines reacted, with protons in acetic acid-sulphuric acid mixture to yield the corresponding 3-unsubstituted acetylaminopyrazolo[1,5-a]pyrimidines. Diazotized Ia and Ib coupled with a variety of active methylene reagents to yield pyrazolo[5,1-c][1,2,4]triazines.
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Al-Azmi, Amal, and Elizabeth John. "Synthesis of 4-arylazo-2-(N-pyrazolylcarboxamido)thiophene disperse dyes for dyeing of polyester and their antibacterial evaluation." Textile Research Journal 90, no. 23-24 (June 9, 2020): 2795–805. http://dx.doi.org/10.1177/0040517520931476.

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The current article aims to synthesize some new arylazo-thiophenes for dyeing polyester fabrics and screen their antimicrobial activities. The new 4-arylazo-2-( N-pyrazolylcarboxamido)-thiophene dyes 4a–e were prepared by the reaction of 2-acetyl-2-arylazo-thioacetanilide derivative 1 with 2-chloro- N-(3-methyl-1 H-pyrazol-5-yl)acetamide derivative 2. The structures of these prepared analogues were established via Fourier-transform infrared and 1H/13C nuclear magnetic resonance spectra. The synthesized dyestuffs were applied to polyester fabrics after establishing the optimal dyeing conditions at 130 ºC, high pressure, 3% shade, and liquor ratio 20:1 at pH 5. Furthermore, the dyed fabrics obtained under these optimal conditions resulted in proper colorfastness toward washing, rubbing, sublimation and perspiration, and were adequate for light fastness. They showed respectable antibacterial effectiveness against two bacterial strains, Staphylococcus aureus (Gram-positive) and Salmonella typhimurium (Gram-negative) bacteria. The dyed fabric with dye 4d displayed the best antibacterial activities with percentage reduction of 88% and 76% against S. aureus and S. typhimurium bacteria, respectively.
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Zayed, Ezzat Mohamed, and Said Ahmed Soliman Ghozlan. "4-AryIazo-3,5-diaminoisoxazoIe: Synthesis and Some Chemical Reactions." Zeitschrift für Naturforschung B 40, no. 12 (December 1, 1985): 1727–30. http://dx.doi.org/10.1515/znb-1985-1222.

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Bonanno, Nico M., Zackery Watts, Cole Mauws, Brian O. Patrick, Christopher R. Wiebe, Yuki Shibano, Kenji Sugisaki, et al. "Valence tautomerism in a [2 × 2] Co4 grid complex containing a ditopic arylazo ligand." Chemical Communications 57, no. 50 (2021): 6213–16. http://dx.doi.org/10.1039/d1cc01991k.

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Dissertations / Theses on the topic "Arylazo"

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Chatterjee, Debesh Kumar. "Arylazo phenoxy derivatives of organotin compounds." Thesis, University of North Bengal, 1990. http://hdl.handle.net/123456789/757.

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Lambert, James M. "Synthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymers." Diss., This resource online, 1986. http://scholar.lib.vt.edu/theses/available/etd-07282008-135252/.

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Leblanc, Jean-Pierre. "Synthese et caracterisation de polycondensats renfermant des motifs stilbeniques." Paris 6, 1988. http://www.theses.fr/1988PA066350.

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Polycondensation de l'acide trans stilbenedicarboxylique-4,4' (soa) avec des alpha ,omega -diamino alcanes et des alpha ,omega -diamino oligoethers. Etude de l'incorporation du soa dans des copolyarylates comme le poly(isophtalate de methyl phenylene) en vue d'obtenir des polymeres cristaux liquides, et des polyesters obtenus a partir d'autres monomeres (acide terephtalique). Amelioration des proprietes mecaniques des polycondensats par incorporation d'unites stilbeniques et d'acide p-acetoxybenzoique
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Peng, Hsiao-Hua, and 彭筱華. "Upper Rim Arylazo-Coupled Calix[4]arenes Modified with Oxyacetonitrile, Ester or Tetrazole Groups as Highly Sensitive Chromogenic Sensors for Metal Ions." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/67664146977962231016.

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碩士
國立交通大學
應用化學研究所
98
First of all, 4-(4-methoxyphenyl)azo-coupled calix[4]arenes 34 and 36 were synthesized. UV-vis screening of calix[4]arenes 34 (with ester and oxyacetonitrile) and 36 (with oxypropyl and oxyacetonitrile) with 15 metal ions showed that both of them gave rise to color changes toward Cr3+ ion, and 34 exhibited good binding ability to Ca2+. According to NOE, Job plot and NMR titration experiments, we proposed that 34 chelated Ca2+ with the helps of both oxyacetonitrile and ester groups, and it moved form flattened cone toward cone conformation upon complexation with metal ion. The Ka of 34?杭a2+, 34?杭r3+ and 36?杭r3+ calculated by Benesi-Hildebrand plots were 3.7 ?e 104, 2.1 ?e 104 and 8.1 ?e104 , respectively. In the second part, the syntheses of calix[4]arenes with 4-(4-nitrophenyl)azo calix[4]arenes 38 and 41 were carried out. UV-vis screening showed that calix[4]arene 38 exhibited large bathochromic shifts toward Ca2+ and Ba2+ in more polar protic solvent systems, such as CH3CN/CH3OH (v/v = 19:1). Moreover, 41 was deficient in this ability.The 1H NMR titration results suggested that both azophenols and ester/or oxyacetonitrile groups are required in the chromogenic sensing with metal ions. The Ka of 38?杭a2+, 38?朋a2+ , 41?杭a2+ and 41?朋a2+ were 7.3 ?e104, 2.9 ?e 104, 1.7 ?e 105 and 3.9 ?e 103 , respectively. In the final part, the tetrazole-modified azocalix[4]arenes 44 were synthesized using 1,3-dipolar cycloaddition. We evaluated the metal ion screening abilities of azocalix[4]arenes in more polar protic solvent systems, such as CH3OH or H2O contained solvent systems. The utilities of calix[4]arenes in biological systems or pharmaceutical studies were improved upon tetrazole substitution.
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Loukotová, Lenka. "Přímá arylace a její využití při přípravě supramolekulárních polymerů." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-333238.

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This thesis is divided into two parts. In the first part there is reported palladium- catalysed regioselective direct arylation of benzofurans with arylsulfonyl chlorides as the coupling partner to C2 carbon. The best reaction conditions of this reaction were investigated, then the influence of various arylsulfonyl chloride substituents to the reaction and finally it is reported direct arylation of C2-arylated benzofuran to C3 carbon to give diarylated benzofuran with different aryl substituents. In the second part, there is reported the synthesis of 2-(hydroxymethyl)-5,7-bis{5- [(2,2':6',2''-terpyridine)-4'-yl]thiophen-2-yl}-2,3-dihydrothieno[3,4-b][1,4]dioxin and modification of its sidechain. As a starting material of the synthesis it was used commercially available 4'-bromo-(2,2':6',2''-terpyridine). The synthetic sub-steps included Suzuki cross- coupling, bromination and C-H bond activation. Then it was also reported the complexation of synthesized oligomer with zinc and iron cations.
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Llempén, Coronel Humberto. "1 - Arylo - 4 - Nitroimidazole z 1,4 - Dinitroimidazoli." Rozprawa doktorska, 1991. https://repolis.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3421.

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Llempén, Coronel Humberto. "1 - Arylo - 4 - Nitroimidazole z 1,4 - Dinitroimidazoli." Rozprawa doktorska, 1991. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=3421.

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LIN, YI-CANG, and 林怡蒼. "Study on The Tautomerization of 1-Aryldiazo-2-naphthalenol Derivatives by Using The Spectroscopic Technique." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/85644351672906327063.

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博士
靜宜大學
應用化學系
104
The substituent effect on azo-hydrazone tautomerization of 1-aryldiazo-2-naphthalenol is studied by means of NMR and MS analysis. Among the 13C chemical shifts, the C(2) of this series compound is the most sensitive to the variation in the nature of substituent on the phenyl ring. Therefore, the variation in the chemical shifts of C(2) is used to probe the substituent effect by using the substituent chemical shifts and free energy vs. Hammett’s constant (σ+). Both methods give a negative correlation slope, which are ρ=-8.74 and ρ=-1.38 , indicating the electron-withdrawing groups favor the hydrazone tautomer form. The effect on the chemical shifts of C(2) of 1-phenyldiazo-2-naphthalenol in ten solvents can be classified as the solvent with a proton-donor, proton-acceptor and arenes system. The substituent with electron-donating character is more sensitive to the nature of solvent and it favors the azo form. Free energy obtained from the dynamic NMR technique indicates the tautomerization favors the hydrazone-form for the substituent with electron-withdrawing character. The relaxation time of carbon are slight affected by the size of substituents. In the viscosity study, an inverse-law relationship between relaxation times and viscosity was observed. An electron-ionization (EI) mass spectra of a series of 1-aryldiazo-2-naphthalenol was obtained for studying the substituent effect on the fragmentation. The correlation between the ratio, molecular ion and fragment ion, and Hammett’s constants is applied to examine the effect of the substituent on the fragmentation. The negative correction between the ratio, Imolecular ion/(I171amu + I143amu + I115amu), and Hammett’s constants, which is ρ=-0.778, indicates an electron-withdrawing group destabilized the molecular ion. An unusual long-range hydrogen transfer demonstrates an important role in the fragmentation process.
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Books on the topic "Arylazo"

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C, Bradley D., ed. Alkoxo and aryloxo derivatives of metals. San Diego: Academic Press, 2001.

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Alkoxo and Aryloxo Derivatives of Metals. Elsevier, 2001. http://dx.doi.org/10.1016/b978-0-12-124140-7.x5000-2.

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Mehrotra, R. C., Ian Rothwell, A. Singh, and Don Bradley. Alkoxo and Aryloxo Derivatives of Metals. Academic Press, 2001.

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Mehrotra, R. C., Ian Rothwell, A. Singh, and Don Bradley. Alkoxo and Aryloxo Derivatives of Metals. Academic Press, 2001.

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Rothwell, Ian, A. Singh, Don Bradley, and R. C. Mehrotra. Alkoxo and Aryloxo Derivatives of Metals. Elsevier Science & Technology Books, 2001.

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Smith, M. J. The Staff of Water: A part of the Aryla's chosen series. AuthorHouse, 2006.

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Book chapters on the topic "Arylazo"

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Wood, William W., Andrew C. G. Gray, and Thomas W. Naisby. "Arylazo- and Arylazoxy-Oximes as Fungicides." In ACS Symposium Series, 284–94. Washington, DC: American Chemical Society, 1998. http://dx.doi.org/10.1021/bk-1998-0686.ch028.

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Emandi, A., M. Calinescu, S. Ioachim, R. Georgescu, and I. Serban. "Synthesis and Characterization of the 2:1 Copper(II) Complexes With 4-Arylazo-Pyrazol-5-One Derivatives." In Multiphoton and Light Driven Multielectron Processes in Organics: New Phenomena, Materials and Applications, 489–502. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4056-0_36.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of iron(III) complex with 8-arylazo-6-formyl-7-hydroxy-5-methoxy-2-methylchromone." In Magnetic Properties of Paramagnetic Compounds, 314–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_173.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of iron(III) chelate with 8-arylazo-6-formyl-7-hydroxy-5-methoxy-2-methylchromone." In Magnetic Properties of Paramagnetic Compounds, 316–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54231-6_174.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) chelate with 8-arylazo-6-formyl-7-hydroxy-5-methoxy-2-methylchromone." In Magnetic Properties of Paramagnetic Compounds, 295–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54237-8_153.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of dinuclear copper(II) complex with 8-arylazo-6-formyl-7-hydroxy-5-methoxy-2-methylchromone." In Magnetic Properties of Paramagnetic Compounds, 841–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54237-8_483.

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Low, William, James Kang, Micheal DiGruccio, Dean Kirby, Marilyn Perrin, and Wolfgang H. Fischer. "MALDI-MS Analysis of Peptides Modified with Photolabile Arylazido Groups." In Methods in Proteome and Protein Analysis, 261–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08722-0_17.

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Guillory, Richard John. "Interaction of Arylazido-β-Alanyl ATPa with the ATPase Enzyme of Rhodospirillum Rubrum Chromatophores." In Molecular Structure, Function, and Assembly of the ATP Synthases, 229–37. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0593-4_23.

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Kikelj, D., and U. Urleb. "Introduction of Arylazo Groups." In Five-Membered Hetarenes with One Chalcogen and One Additional Heteroatom, 1. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-011-00955.

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Koutentis, P. A., and H. A. Ioannidou. "Introduction of Arylazo Groups." In Science of Synthesis Knowledge Updates KU 2011/1, 1. Georg Thieme Verlag KG, 2010. http://dx.doi.org/10.1055/sos-sd-111-00249.

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Conference papers on the topic "Arylazo"

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Abd-El-Nour, K. N. "Dielectric behaviour of some arylazo benzothiazine derivatives in relation to its microbial activity." In Seventh International Conference on Dielectric Materials, Measurements and Applications. IEE, 1996. http://dx.doi.org/10.1049/cp:19961035.

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Agafonova, N. A., N. A. Elkina, E. V. Shchegolkov, Ya V. Burgart, and V. I. Saloutin. "Synthesis of 4-amino-3-trifluoromethylpyrazoles by the reduction of nitroso- and arylazo-substituted precursors." In X ИНФОРМАЦИОННАЯ ШКОЛА МОЛОДОГО УЧЕНОГО Екатеринбург, 19-22сентября 2022 г. Екатеринбург: ООО "Издательство УМЦ УПИ", 2022. http://dx.doi.org/10.32460/ishmu-2022-10-0010.

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Tadić, Julijana D., Jelena M. Lađarević, Maja D. Marković, Aleksandra M. Ivanovska, Mirjana M. Kostić, and Dušan Ž. Mijin. "A NOVEL AZO-AZOMETHINE DYE: SYNTHESIS, DYEING AND ANTIOXIDANT PROPERTIES." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.379t.

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Schiff bases, or azomethine compounds, are commonly employed in the fields of organic synthesis, metal complexes, materials, and engineering. Especially, they have gained importance in medicinal researches, considering their antimicrobial, anticancer, anti- inflammatory, and antioxidant properties. On the other side, azo dyes are the most significant group of synthetic dyes, utilized in textile fiber dyeing. Conjugation of Schiff bases with azo compounds leads to the class of azo-azomethine dyes, which have numerous applications related to their coloration and biological properties. Viscose is a textile material widely used in the medicine. Moreover, viscose fiber can be engineered in many ways which are significant in the development of medical materials. The antioxidant effect is an important feature of medical textiles, such as wound dressings. In this work, the microwave-assisted synthesis and characterization of novel azo-azomethine dye are reported. The azo-azomethine dye is obtained by the condensation between arylazo pyridone dye and 4-aminophenol. The structure of synthesized dye was determined by ATR-FTIR, NMR, and UV-Vis spectroscopy. Azo- azomethine dye was used for dyeing viscose, and the washing fastness of dyed material was evaluated according to the standard method. The viscose fabrics, before and after washing, were analyzed in terms of their color coordinates in the CIELab color space. The antioxidant properties of azo-azomethine dye and dyed viscose fabrics were examined by the ABTS method.
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