Thematische Bibliographien / Aromatic Nitrogen-heterocycles

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Auswahl der wissenschaftlichen Literatur zum Thema „Aromatic Nitrogen-heterocycles“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

Zuletzt aktualisiert am 31. Juli 2025

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Zeitschriftenartikel zum Thema "Aromatic Nitrogen-heterocycles"

Zong, He-Hou, Chuang Yao, Chang Q. Sun, Jian-Guo Zhang, and Lei Zhang. "Structure and Stability of Aromatic Nitrogen Heterocycles Used in the Field of Energetic Materials." Molecules 25, no. 14 (2020): 3232. http://dx.doi.org/10.3390/molecules25143232.

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Understanding the stabilization of nitrogen heterocycles is critical in the field of energetic materials and calls for innovative knowledge of nitrogen aromatics. Herewith, we report for the first time that nitrogen lone pair electron (NLPE) delocalization in five-membered nitrogen heterocycles creates a second σ-aromaticity in addition to the prototypical π-aromaticity. The NLPE delocalization and the attendant dual-aromaticity are enhanced as more carbon atoms in the ring are substituted by unsaturated nitrogen atoms. The presence of adjacent nitrogen atoms in the ring can enhance the aromat

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Palumbo Piccionello, Antonio. "Editorial for Special Issue “Bioactive Oxadiazoles”." International Journal of Molecular Sciences 22, no. 8 (2021): 3988. http://dx.doi.org/10.3390/ijms22083988.

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Palumbo Piccionello, Antonio. "Bioactive Oxadiazoles 2.0." International Journal of Molecular Sciences 23, no. 7 (2022): 3841. http://dx.doi.org/10.3390/ijms23073841.

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Cervenka, Jiri, Akin Budi, Nikolai Dontschuk, et al. "Graphene field effect transistor as a probe of electronic structure and charge transfer at organic molecule–graphene interfaces." Nanoscale 7, no. 4 (2015): 1471–78. http://dx.doi.org/10.1039/c4nr05390g.

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Sachar, Anand, Poonam Gupta, Shallu Gupta, and R. L. Sharma. "A novel approach towards the synthesis of tricyclic systems based on pyridine, pyran, thiopyran, azepine, oxepin, thiepin, and pyrimidine rings under different solvent conditions." Canadian Journal of Chemistry 88, no. 5 (2010): 478–84. http://dx.doi.org/10.1139/v10-015.

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Deep, Aman, PrachI, and Hament Panwar. "THE CHEMISTRY OF HEALING: HETEROATOMIC DERIVATIZATION AND THEIR MEDICINAL APPLICATIONS." Annals of Science and Allied Research 2, no. 1 (2024): 26–37. https://doi.org/10.5281/zenodo.12599903.

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Heterocyclic compounds are gaining attention for their medical and biological applications, with over 90% of new drugs containing them. Among all the heterocyclic molecules, mimics of nitrogen-based heterocycles occupy an exclusive position as a valuable source of therapeutic agents in medicinal chemistry. More than 75% of drugs approved by the FDA and currently available in the market are nitrogen-containing heterocyclic moieties. In the forthcoming decade, a much greater share of new nitrogen-based pharmaceuticals is anticipated. Many new nitrogen-based heterocycles have been designed. The n

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Steel, Peter J. "Aromatic nitrogen heterocycles as bridging ligands; a survey." Coordination Chemistry Reviews 106 (November 1990): 227–65. http://dx.doi.org/10.1016/0010-8545(60)80005-7.

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Savić, Nada D., Dusan R. Milivojevic, Biljana Đ. Glišić, et al. "A comparative antimicrobial and toxicological study of gold(iii) and silver(i) complexes with aromatic nitrogen-containing heterocycles: synergistic activity and improved selectivity index of Au(iii)/Ag(i) complexes mixture." RSC Advances 6, no. 16 (2016): 13193–206. http://dx.doi.org/10.1039/c5ra26002g.

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Combination therapy may be applied in the case of gold(iii) and silver(i) complexes with aromatic nitrogen-containing heterocycles to improve their antimicrobial activity and reduce toxic-side effects.

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McGuire, Brett A., Andrew M. Burkhardt, Sergei Kalenskii, et al. "Detection of the aromatic molecule benzonitrile (c-C6H5CN) in the interstellar medium." Science 359, no. 6372 (2018): 202–5. http://dx.doi.org/10.1126/science.aao4890.

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Polycyclic aromatic hydrocarbons and polycyclic aromatic nitrogen heterocycles are thought to be widespread throughout the universe, because these classes of molecules are probably responsible for the unidentified infrared bands, a set of emission features seen in numerous Galactic and extragalactic sources. Despite their expected ubiquity, astronomical identification of specific aromatic molecules has proven elusive. We present the discovery of benzonitrile (c-C6H5CN), one of the simplest nitrogen-bearing aromatic molecules, in the interstellar medium. We observed hyperfine-resolved transitio

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He, Jiwen, Xingguo Zhang, Qiuqin He, Hao Guo, and Renhua Fan. "Synthesis of 15N-labeled heterocycles via the cleavage of C–N bonds of anilines and glycine-15N." Chemical Communications 57, no. 44 (2021): 5442–45. http://dx.doi.org/10.1039/d1cc01734a.

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Dissertationen zum Thema "Aromatic Nitrogen-heterocycles"

Peng, Hao. "Investigations toward metal-free hydroamination approaches to aromatic nitrogen heterocycles." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28874.

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Metal-free hydroamination approaches were investigated to afford aromatic nitrogen heterocycles. Several substrates were synthesized to test different sequences such as 6-endo-dig and 6-exo-dig cyclization. The desired reactivity was observed for each of the desired routes, which were discussed in Chapter 2. More research is needed for optimization in the future.* *Please refer to dissertation for diagrams.

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Fulton, Craig Kennedy. "The microbial transformation of nitrogen and sulphur containing heterocycles fused to aromatic centres." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/29649.

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The microbial degradation of isothiazolin rings was investigated. A mixed culture of bacteria able to utilise the isothiazolin ring containing compound saccharin as a source of carbon and nitrogen was isolated. A single type of bacterium able to utilise saccharin as a source of nitrogen was isolated from the community and identified as an Alcaligenes sp. A second organism able to utilise benzoate as a carbon source was isolated and identified as a Pseudomonas sp. Together the two bacteria were able to utilise saccharin as a source of carbon and nitrogen. The end products ammonia, sulphite, sul

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Anand, R. "Synthesis of nitrogen containing heterocycles and acid catalyzed reactions of aromatic amines over medium and large pore zeolites." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2002. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2343.

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Yue, Congyong. "Palladium complexes of aromatic amide-derived phosphines and application for synthesis of biaryls, nitrogen heterocycles, and benzo[b]furans /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CHEM%202009%20YUE.

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Leone, Loredana. "Synthesis, properties and applications of bioinspired nitrogen and/or group 16 aromatic heterocycles." Tesi di dottorato, 2014. http://www.fedoa.unina.it/9937/1/Leone_Loredana_26.pdf.

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A prominent position among naturally occurring N,S heterocyclic systems is occupied by 1,4-benzothiazines that form the key structural unit of pheomelanin pigments responsible for the red hair phenotype, typically found in red hair individuals with pale skin and enhanced susceptibility to skin cancer and melanoma. The chromophore exhibited by these pigments has been associated to the presence of the Δ2,2'-bi-(2H-1,4-benzothiazine) system. This is an indigo type chromophore which has not so far been fully exploited in the field of functional dyes. This Δ2,2'-bi-(2H-1,4-benzothiazine) exhibits

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Krishnan, Anand. "Synthesis of Bioactive Nitrogen Heterocycles and Functionalized Nanomaterials for Biological and Catalytic Applications." Thesis, 2015. http://hdl.handle.net/10321/1181.

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Submitted in fulfillment of the requirements of the Degree of Doctor of Technology: Chemistry,Durban University of Technology, 2014.<br>Aromatic heterocycles are highly important structural units found in a large number of biologically active natural compounds, pharmaceuticals and catalytic compounds. They have a crucial role in organic syntheses, which results in the generation of high value products. Among heterocycles, those containing nitrogen are the most indispensable structural motifs and are widely used against dreaded diseases such as Malaria, TB, HIV/AIDS and Cancer. The inclusion of

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Bücher zum Thema "Aromatic Nitrogen-heterocycles"

Chierici, Sabine. Exercise Book on Aromatic Nitrogen Heterocycles Chemistry: How to Deal with the Synthesis and Reactivity of Five- and Six-Membered Rings. EDP Sciences, 2023.

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Buchteile zum Thema "Aromatic Nitrogen-heterocycles"

Clayden, Jonathan, Nick Greeves, and Stuart Warren. "Aromatic heterocycles 1: reactions." In Organic Chemistry. Oxford University Press, 2012. http://dx.doi.org/10.1093/hesc/9780199270293.003.0029.

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This chapter investigates the reactions of aromatic heterocycles. Benzene is aromatic because it has six electrons in a cyclic conjugated system. Most organic compounds belong to the class of aromatic heterocycles, and they number among them some of the most significant compounds for human beings. The chapter begins by considering how aromaticity survives when parts of benzene’s ring are replaced by nitrogen atoms. How can we insert a heteroatom into the ring and retain aromaticity? What kind of atom is needed? If we want to replace one of the carbon atoms of benzene with a heteroatom, we need

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Davies, David T. "Isoxazoles, pyrazoles, and isothiazoles." In Aromatic Heterocyclic Chemistry. Oxford University Press, 1992. http://dx.doi.org/10.1093/hesc/9780198556602.003.0004.

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This chapter investigates isoxazoles, pyrazoles, and isothiazoles. Isoxazole, pyrazole, and isothiazole are the parent structures of the 1,2-azole family of heterocycles, having a nitrogen atom plus one other heteroatom in a 1,2-relationship in a five-membered ring. The aromatic sextet is completed by delocalization of the lone pair from the second heteroatom. Consequently, as in pyridine, the nitrogen atoms of the 1,2-azoles have a lone pair available for protonation. However, the 1,2-azoles are significantly less basic than the 1,3-azoles because of the electron-withdrawing effect of the adj

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Davies, David T. "Five-membered ring heterocycles with three or four heteroatoms." In Aromatic Heterocyclic Chemistry. Oxford University Press, 1992. http://dx.doi.org/10.1093/hesc/9780198556602.003.0008.

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This chapter addresses the broad category of five-membered ring heterocycles containing three or four heteroatoms, which encompasses many heterocyclic systems. Obviously, there is considerable variation in the physical and chemical properties of such a large group of heterocycles. For instance, with regard to aromaticity, oxadiazole is considered to be less aromatic than triazole or tetrazole. Nevertheless, this collection of heterocycles does share certain characteristics. The trend of decreasing tendency towards electrophilic substitution on going from furan, pyrrole, and thiophene to the az

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Byers, Jeffrey H., Gregory W. Woo, Anne J. Dewitt, Michael P. Duff, and Christopher G. Nasveschuk. "Radical Aromatic Substitution on Nitrogen Heterocycles." In 19th International Congress on Heterocyclic Chemistry. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-08-044304-1.50119-2.

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Davies, David T. "Pyrimidines." In Aromatic Heterocyclic Chemistry. Oxford University Press, 1992. http://dx.doi.org/10.1093/hesc/9780198556602.003.0010.

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This chapter explores pyrimidines. Formal replacement of a CH unit in pyridine by a nitrogen atom leads to the series of three possible diazines: pyridazine, pyrimidine, and pyrazine. Like pyridine, they are fully aromatic heterocycles. The effect of an additional nitrogen atom as compared to pyridine accentuates the essential features of pyridine chemistry. Electrophilic substitution is difficult in simple unactivated diazines because of both extensive protonation under strongly acidic conditions and the inherent lack of reactivity of the free base. Nucleophilic displacements are comparativel

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Davies, G. H. M., and S. R. Wisniewski. "6.1.43 Product Subclass 43: Azaborines (Borazines)." In Knowledge Updates 2021/2. Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/sos-sd-106-00205.

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AbstractAzaborines (or borazines) represent an interesting class of heterocycles incorporating a boron–nitrogen structural motif within an aromatic ring system. This creates a system that is isosteric to traditional all-carbon ring systems, as the lone pair on nitrogen can donate into the empty orbital at boron to afford aromatic properties. Reviewed herein are synthetic strategies to access mono- and bicyclic azaborine cores, along with subsequent functionalization strategies, some of which are uniquely applicable due to the inherent dipole imparted on these ring systems.

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Palekar, Vikrant Sudhakar, and Kulbhushan A. Sasane. "Examining Biological Relevence of Thiazolo Thiadiazole and Thiazolo Thiazole Fused Heterocyles." In Advances in Bioinformatics and Biomedical Engineering. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-7520-4.ch005.

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Aromatic Fused heterocycles containing Nitrogen (N) and Sulfur(S) has extraordinary bioactive behavior due to which they are attracting the interest of chemists worldwide & thus used as a potential material in medicinal/pharmaceutical industries. The nitrogen-sulphur fused heterocycles attracting attention of the researchers due to number of biological and pharmacological activities and observed to exhibit extensive applications in drug discovery and development. The efforts are made to understand biological activity based on position of heteroatom & the substituent present in 5-member

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Davies, David T. "Quinolines and isoquinolines." In Aromatic Heterocyclic Chemistry. Oxford University Press, 1992. http://dx.doi.org/10.1093/hesc/9780198556602.003.0006.

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This chapter assesses quinolines and isoquinolines. Quinoline and isoquinoline are two isomeric heterocyclic systems, which can be envisaged as being constructed from the fusion of a benzene ring at the C2/C3 and C3/C4 positions of pyridine respectively. They are both ten π-electron aromatic heterocycles. Like pyridine, they are moderately basic. Indeed, quinoline is sometimes used as a high boiling-point basic solvent. As with pyridine, the nitrogen atoms of quinoline and isoquinoline each bear a lone pair of electrons not involved in aromatic bonding which can be protonated, alkylated, or co

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Comins, Daniel L., and Sean O'Connor. "Regioselective Substitution in Aromatic Six-Membered Nitrogen Heterocycles." In Advances in Heterocyclic Chemistry Volume 44. Elsevier, 1988. http://dx.doi.org/10.1016/s0065-2725(08)60263-9.

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"Thiophene Synthesis." In Greener Organic Transformations. The Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/9781837670895-00174.

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Thiophenes are sulfur-containing aromatic heterocycles, the simple derivatives of which are stable liquids. Unlike their nitrogen-containing analogues, thiophene-containing compounds rarely occur in plants and have no role in the metabolism of animals. This chapter introduces the traditional synthesis of thiophenes before looking at the issues around the reactions and some green chemistry solutions.

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Konferenzberichte zum Thema "Aromatic Nitrogen-heterocycles"

Andrejević, Tina P., Darko P. Ašanin, Nada D. Savić, Nevena Lj Stevanović, Miloš I. Djuran, and Biljana Đ. Glišić. "DNA/BSA BINDING STUDY OF DINUCLEAR GOLD(III) COMPLEXES WITH AROMATIC NITROGEN-CONTAINING HETEROCYCLES AS BRIDGING LIGANDS." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.312a.

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In recent decades, a special attention has been devoted to gold(III) complexes as potential antitumor agents due to their structural similarity to platinum(II) complexes. One of the possible mechanisms of the mode of antitumor activity of gold(III) complexes could include their interaction with DNA. However, the effectiveness of the therapeutic agents also depends on the degree of its binding to proteins present in the blood plasma, because, in this way, it is transported to the cell. Considering this, we investigated the interactions of three dinuclear gold(III) complexes of the general formu

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Stevanović, Nevena Lj, Mia Stanković, Tina P. Andrejević, Darko P. Ašanin, Ivana M. Stanojević, and Biljana Đ. Glišić. "DNA AND BSA INTERACTIONS OF COPPER(II) AND ZINC(II) COMPLEXES WITH ANTIFUNGAL AGENT FLUCONAZOLE." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.399s.

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Aromatic nitrogen-containing heterocycles (N-heterocycles) have attracted a considerable attention as scaffolds for compounds, which have an application in different pharmacological areas, ranging from vitamins to different antimicrobial and antitumor agents. In this respect, azoles are of special importance as potent and broad-spectrum agents used for the treatment of many invasive fungal infections. In the present study, the interaction of the clinically used antifungal drug fluconazole (fcz) and its copper(II) and zinc(II) complexes, {[CuCl2(fcz)2].5H2O}n (1) and {[ZnCl2(fcz)2]·2C2H5OH}n (2

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