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Relevant bibliographies by topics / Monomers Heterocyclic compounds

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Journal articles

Academic literature on the topic 'Monomers Heterocyclic compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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Journal articles on the topic "Monomers Heterocyclic compounds"

1

Karateev, Arnold, Andrew Koryagin, Denis Litvinov, Ludmila Sumtsova, and Yana Taranukha. "New network polymers based on furfurylglycidyl ether." Chemistry & Chemical Technology 2, no. 1 (2008): 19–26. http://dx.doi.org/10.23939/chcht02.01.019.

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Among the activities done under the present work are the following: - study of the kinetic regularities of the polymerization of new heterocyclic monomers and oligomers obtained from interaction between furfurylglycidyl ether and aliphatic monocarboxylic acids (saturated and unsaturated); -determination of the polymerization mechanism in the absence of complex onium catalysts; -determination of the structure and composition of monomeric and polymeric compounds by using chemical and physicochemical techniques and 1Н-NМR spectral analysis. The kinetic regularities for polymerization have been st

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2

Gupta, Ajay K., Ali Ben-Mahmud, Lisa J. Kamphuis, et al. "Methine bases in the benzothiazole, benzoselenazole, and quinoline series, and geometry and conformational preferences of their acyl derivatives." Canadian Journal of Chemistry 73, no. 8 (1995): 1278–86. http://dx.doi.org/10.1139/v95-157.

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Dimeric structures 2a–c are confirmed for the "methine bases" obtained from 2-methylbenzo-thiazolium and -selenazolium salts and aqueous sodium hydroxide, whereas monomeric structures 3 are confirmed for methine bases similarly derived from 2-methylquinolinium salts. The latter monomers dimerize slowly on standing. Monomeric methine bases 6–9, too hindered to dimerize, are described. 2-Acetonylidene-2,3-dihydro-3-methylbenzothiazole 10a and related compounds are assigned (Z) configurations on the basis of NOE difference spectra. Molecular mechanics calculations predict a slightly higher steric

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3

Wang, Shijun, Xiaorong Yuan, Hao Qian, Na Li, and Junru Wang. "Design, Synthesis, and Biological Evaluation of Two Series of Novel A-Ring Fused Steroidal Pyrazines as Potential Anticancer Agents." International Journal of Molecular Sciences 21, no. 5 (2020): 1665. http://dx.doi.org/10.3390/ijms21051665.

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Background: Increasingly, different heterocyclic systems have been introduced into the steroid nucleus to significantly enhance the antitumor activities of steroid molecules. However, in this study, few literature precedents describing the pyrazine heterocyclic-condensed modification to an A-ring of steroid monomers were found, although the pyrazine group is thought to be essential for the potent anticancer activity of clinically relevant drugs and natural steroid dimers. Methods and Results: Two series of novel A-ring fused steroidal pyrazines were designed and efficiently synthesized from co

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4

Saalfrank, Rolf W., Klaus Schobert, Stefan Trümmer, and Alexander Wolski. "Synthese und Koordinationschemie eines neuartigen Bistetrazols: Ein 1D-Metallopolymer durch Selbstorganisation koordinativ ungesättigter Zink(II)-M4onomere [1] / Synthesis and Coordination Chemistry of a New Bistetrazole: A 1D-Metallopolymer via Self-Assembly of Monomeric Zinc(II)-Buildingblocks." Zeitschrift für Naturforschung B 50, no. 4 (1995): 642–48. http://dx.doi.org/10.1515/znb-1995-0429.

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The new bistetrazole 13 has been obtained by subsequent formation of the two heterocyclic units. In methanolic solution 13 reacts with zinc(II) acetate to yield the pseudo-meso-1 D-coordination polymer [ZnL2(MeOH)]n (n = ∞) 14. The structure of 14 was established by single crystal X-ray diffraction. The generation of the polymeric chain 14 is understandable, if intermediate formation of coordinatively unsaturated zinc(II) buildingblocks (Δ)-15 and (Λ)-15 is assumed. Alternating linkage of the self-complementary chiral monomers 15, across one cyanofunction each, leads to 14 with zinc being esse

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5

Kharchenko, Oksana, Vitaliy Smokal, and Oksana Krupka. "SYNTHESIS OF MONOMERS BASED ON 6-HYDROXYAURONE AND INVESTIGATION ITS PHOTOCHEMICAL PROPERTIES." Ukrainian Chemistry Journal 86, no. 4 (2020): 118–25. http://dx.doi.org/10.33609/2708-129x.86.4.2020.118-125.

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In particular, as an important class of organic heterocyclic dyes, aurones exhibit unique photochemical and photophysical properties, which render them useful in a variety of applications, such as fluorescent labels and probes in biology and medicine. Despite of the wide range of applications, the photochemical properties of the aurone class remain less well known. The backbone of aurone molecule has excellent planarity and from the viewpoint of molecular engineering, molecular planarity plays an important role in tuning nonlinear optical properties of materials. Therefore, this work is aimed

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6

El Seoud, Omar A., Nicolas Keppeler, Naved I. Malek, and Paula D. Galgano. "Ionic Liquid-Based Surfactants: Recent Advances in Their Syntheses, Solution Properties, and Applications." Polymers 13, no. 7 (2021): 1100. http://dx.doi.org/10.3390/polym13071100.

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The impetus for the expanding interest in ionic liquids (ILs) is their favorable properties and important applications. Ionic liquid-based surfactants (ILBSs) carry long-chain hydrophobic tails. Two or more molecules of ILBSs can be joined by covalent bonds leading, e.g., to gemini compounds (GILBSs). This review article focuses on aspects of the chemistry and applications of ILBSs and GILBSs, especially in the last ten years. Data on their adsorption at the interface and micelle formation are relevant for the applications of these surfactants. Therefore, we collected data for 152 ILBSs and 11

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7

Quirk, Roderic P., Jian Yin, Shao-Hua Guo, et al. "Recent Advances in Anionic Synthesis of Functionalized Polymers." Rubber Chemistry and Technology 64, no. 4 (1991): 648–60. http://dx.doi.org/10.5254/1.3538580.

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Abstract There has been growing interest and research on new synthetic methods for the preparation of well-defined polymers with in-chain and chain-end functional groups. These functional groups in polymers can participate in (a) reversible ionic association; (b) chain extension, branching or crosslinking reactions with polyfunctional reagents; (c) coupling and linking with reactive groups on other oligomer or polymer chains; and (d) initiation of polymerization of other monomers. It is noteworthy that the use of end-functionalized polybutadienes formed by reaction of poly(butadienyl)lithium w

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8

Pearson, Céline, and André L. Beauchamp. "1H NMR study of paramagnetic rhenium(III) monomers with nitrogen heterocycles. Crystal structures of ReCl3L2(PPh3) complexes (L = pyridine, 3-picoline, and 1-methylimidazole)." Canadian Journal of Chemistry 75, no. 2 (1997): 220–31. http://dx.doi.org/10.1139/v97-026.

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Rhenium(III) monomers of the type ReCl3Ln(PPh3)3−n, where n = 1,2, and 3, were prepared for simple nitrogen heterocyclic ligands L and characterized mainly by 1H NMR and IR spectroscopies. Most of the 1H NMR signals of these paramagnetic compounds were assigned by using methylated pyridines. A mer-cis octahedral geometry slightly distorted by triphenylphosphine was determined by X-ray diffraction for three ReCl3L2(PPh3) complexes: L = pyridine, triclinic, [Formula: see text], a = 11.379, b = 13.532, c = 18.160 Ǻ, α = 80.16°, β = 89.57, γ = 86.27°, Z = 4, R = 0.076; L = 3-picoline, triclinic, [

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9

Kotov, Alexandr D., Anna S. Forostyanko, Elena A. Vasilyeva, Anna S. Kunichkina, Irina K. Proskurina, and Maxim B. Kuzhin. "Experimental and theoretical study of the fragmentation of dichloro-3-aryl-2,1-benzisoxazoles." Butlerov Communications 59, no. 8 (2019): 24–31. http://dx.doi.org/10.37952/roi-jbc-01/19-59-8-24.

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2,1-Benzisoxazoles or anthranyls have different types of biological activity, are used to obtain monomers for polymeric materials, dyes and other heterocyclic compounds. In addition, 2,1-benzisoxazoles attract the attention of researchers due to the presence of a weak N-O bond, which is a potential place for the opening of the cycle in the reactions of reduction, oxidation, and various transformations. Therefore, it is very important to study their structure, methods of identification and reactivity in the processes taking place with their participation. One of the most effective modern resear

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10

Todea, Bîtcan, Aparaschivei та ін. "Biodegradable Oligoesters of ε-Caprolactone and 5-Hydroxymethyl-2-Furancarboxylic Acid Synthesized by Immobilized Lipases". Polymers 11, № 9 (2019): 1402. http://dx.doi.org/10.3390/polym11091402.

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Following the latest developments, bio-based polyesters, obtained from renewable raw materials, mainly carbohydrates, can be competitive for the fossil-based equivalents in various industries. In particular, the furan containing monomers are valuable alternatives for the synthesis of various new biomaterials, applicable in food additive, pharmaceutical and medical field. The utilization of lipases as biocatalysts for the synthesis of such polymeric compounds can overcome the disadvantages of high temperatures and metal catalysts, used by the chemical route. In this work, the enzymatic synthesi

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