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Articles de revues sur le sujet « Carbazoli »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Manu, Tripathi* Shweta Shukla Meera Kumari Amresh Gupta. "Recent advancement of carbazole hybrid: a privileged scaffold in new drug discovery." International Journal of Advances in Pharmacy Medicine and Bioallied Sciences 10, no. 3 (2022): 123–34. https://doi.org/10.5281/zenodo.7709108.

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Carbazole comprises an important class of heterocycles. Carbazole is a tricyclic molecule having a coal tar carbon backbone, and also it has the structural properties of numerous compounds used in electronics for the manufacturing of polymers or dyes and electroluminescent materials, owing to its luminous quality. It has been reported that diverse biological activities include anti-cytotoxicity, bacteria-related problems, neurological problems, etc. Some carbazole derivatives were created such carbazoles with N-substitution, benzocarbazoles, furocarbazoles, pyrrolo-carbazoles, imidazo-carbazol

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2

Hsiao, Sheng-Huei, and Shu-Wei Lin. "Electrochemical synthesis of electrochromic polycarbazole films from N-phenyl-3,6-bis(N-carbazolyl)carbazoles." Polymer Chemistry 7, no. 1 (2016): 198–211. http://dx.doi.org/10.1039/c5py01407g.

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Sweta, Shukla, and Gupta Sujeet. "Carbazole derivatives: an attractive scaffold in anticancer lead discovery." International Journal of Advances in Pharmacy Medicine and Bioallied Sciences 10, no. 2 (2022): 88–93. https://doi.org/10.5281/zenodo.7066183.

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Cancer is one of the leading chronic diseases with a high mortality rate worldwide.  Current statistical studies on cancer estimates from the World Health Organization (WHO) in 2020, cancer is the first or second leading cause of death. Although cancer remains a devastating diagnosis, several decades of preclinical progress in cancer biology and biotechnology have recently led to the successful development of several biological agents that substantially improve survival and quality of life for some patients. For over half a century, the carbazole skeleton has been the key structural motif

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Liebau, Verena, Mathias Noltemeyer, Jörg Magull, and Uwe Klingebiel. "Carbazolylsilane: Synthese und Kristallstrukturen / Carbazolylsilanes: Synthesis and Crystal Structures." Zeitschrift für Naturforschung B 59, no. 9 (2004): 1045–50. http://dx.doi.org/10.1515/znb-2004-0916.

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Carbazole reacts with n-BuLi and fluorosilanes to give the lithium carbazolide (1) which crystallizes as a dimer from THF. In the reactions of 1 and difluorosilanes, F2SiR2, the carbazolylsilanes C12H8N-SiFR2 (2 - 4 R = Me (2), i Pr (3), t-Bu (4)), are obtained. Bis(carbazolyl)silanes, (C12H8N)2SiFR, are formed in the reaction of 1 with trifluorosilanes, F3SiR, in a molar ratio of 2:1, R = t-Bu (5), Ph (6), Me (7). Using F3SiMe and 1 in a molar ratio of 1:3 the tris(carbazolyl)silane (C12H8N)3SiMe (8) is isolated. The carbazolylfluorosilane 3 reacts with n-BuLi to give 1 and n-butyldiisopropyl

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Karaaslan, Cigdem, Hande Gurer-Orhan, Sibel Suzen, et al. "Behaviour of 9-Ethyl-9H-carbazole Hydrazone Derivatives Against Oxidant Systems." Croatica chemica acta 92, no. 1 (2019): 87–94. http://dx.doi.org/10.5562/cca3481.

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Antioxidants are helpful in prevention of several diseases related with oxidative stress including neurodegenerative disorders. In recent studies, carbazoles were given proof of promising antioxidant activities. In this article, 9-ethyl-9H-carbazole hydrazone derivatives were synthesized, characterized and their in vitro antioxidant activity and possible cytotoxic effects were investigated. Furthermore, protective effect of the synthesized derivatives against amyloid β-induced damage in PC12 neuronal cells was examined by using MTT assay. The newly synthesized carbazoles were found to have rad

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Luparello, Claudio, Ilenia Cruciata, Andreas C. Joerger, et al. "Genotoxicity and Epigenotoxicity of Carbazole-Derived Molecules on MCF-7 Breast Cancer Cells." International Journal of Molecular Sciences 22, no. 7 (2021): 3410. http://dx.doi.org/10.3390/ijms22073410.

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The carbazole compounds PK9320 (1-(9-ethyl-7-(furan-2-yl)-9H-carbazol-3-yl)-N-methylmethanamine) and PK9323 (1-(9-ethyl-7-(thiazol-4-yl)-9H-carbazol-3-yl)-N-methylmethanamine), second-generation analogues of PK083 (1-(9-ethyl-9H-carbazol-3-yl)-N-methylmethanamine), restore p53 signaling in Y220C p53-mutated cancer cells by binding to a mutation-induced surface crevice and acting as molecular chaperones. In the present paper, these three molecules have been tested for mutant p53-independent genotoxic and epigenomic effects on wild-type p53 MCF-7 breast adenocarcinoma cells, employing a combinat

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Beresneviciute, Raminta, Anil Kumar, Dovydas Blazevicius, et al. "Carbazolyl Electron Donor and Pyridinyl Electron Acceptor Containing Derivatives as Potential Host Materials for Green Organic Light-Emitting Diodes." Molecules 30, no. 9 (2025): 1911. https://doi.org/10.3390/molecules30091911.

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Here, we present two series of new electroactive compounds containing electron donors (carbazolyl) and electron acceptor (pyridinyl) fragments as potential host materials. The objective compounds 9-(2-ethylhexyl)-3,6-di [3-(methoxypyridin-3-yl)carbazol-9-yl]carbazoles RB71 and RB74 were synthesized by an Ullmann coupling reaction between the intermediate derivatives: 9-(2-ethylhexyl)-3,6-diiodocarbazole and corresponding 3-(methoxypyridin-3-yl)-9H-carbazole. Other target derivatives, 9-alkyl-3-[N-(9-alkylcarbazol-3-yl)-N-(4-methylpyridin-2-yl)amino]carbazoles RB70 and RB75, were also prepared,

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Nitin Kumar, Neetika lal, Vishal Nemaysh, and Pratibha Mehta Luthra. "Synthesis and in vitro anticancer activity of novel 1,4-dimethyl-9-H-carbazol-3-yl) methanamine derivatives against human glioma U87 MG cell line." World Journal of Advanced Research and Reviews 19, no. 1 (2023): 1099–108. http://dx.doi.org/10.30574/wjarr.2023.19.1.1446.

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Glioblastoma Multiforme (GBM) is most aggressive type of brain tumor in adults. 1,4-dimethyl carbazoles exhibits significant anticancer activities in literature. In this research article, we synthesized a series of novel 1,4-dimethyl-9-H-carbazol-3-yl)methanamine and its derivatives (13-24) and evaluated their in vitro cytotoxicity activities against human glioma U87 MG cell line using MTT assay for 24 h phase time period. All final carbazole derivatives were well confirmed by NMR and HRMS spectroscopy techniques. In series, few compound (15-17) found excellent in vitro anticancer activity (IC

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Krucaite, Gintare, and Saulius Grigalevicius. "Low Molar Mass Carbazole-Based Host Materials for Phosphorescent Organic Light-Emitting Diodes: A Review." Coatings 15, no. 4 (2025): 398. https://doi.org/10.3390/coatings15040398.

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The second-generation phosphorescent organic light-emitting diodes are formed using phosphorescent emitters, which can theoretically achieve 100% internal quantum efficiency. However, these emitting materials usually suffer from triplet–triplet annihilation (TTA) and/or concentration-quenching effects. To address the disadvantages, host–guest systems are used in the emitting layer, where the guest is dispersed into a host matrix. Carbazole is one of the most commonly used electron-donating fragments, which is widely applied as a building block for the synthesis of the mentioned host materials.

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Lifshits, Liubov M., Varun Singh, Matthias Zeller, and Jeremy K. Klosterman. "Ethyl 4-(9H-carbazol-9-yl)benzoate: fivefold superstructure with ten crystallographically independent molecules refined from a twinned crystal." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 901–9. http://dx.doi.org/10.1107/s2053229616015825.

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The photophysical properties of organic fluorophores are sensitive to the local sterics of the surrounding environment. Restriction of torsional motion in aggregates and crystals can give rise to enhanced emissive behavior.N-Aryl-substituted carbazoles serve an essential role as ubiquitous host matrices for organic light-emitting diodes, due to their large band gaps and high triplet energies, and so studies connecting photophysical behaviors with detailed crystallographic structural information are important. To elucidate the structural changes involved in the excited-state charge-transfer pro

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Nitin, Kumar, lal Neetika, Nemaysh Vishal, and Mehta Luthra Pratibha. "Synthesis and in vitro anticancer activity of novel 1,4-dimethyl-9-H-carbazol-3-yl) methanamine derivatives against human glioma U87 MG cell line." World Journal of Advanced Research and Reviews 19, no. 1 (2023): 1099–108. https://doi.org/10.5281/zenodo.10295738.

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Glioblastoma Multiforme (GBM) is most aggressive type of brain tumor in adults. 1,4-dimethyl carbazoles exhibits significant anticancer activities in literature. In this research article, we synthesized a series of novel 1,4-dimethyl-9-<i>H</i>-carbazol-3-yl)methanamine  and its derivatives (13-24) and evaluated their <i>in vitro</i> cytotoxicity activities against human glioma U87 MG cell line using MTT assay for 24 h phase time period. All final carbazole derivatives were well confirmed by NMR and HRMS spectroscopy techniques. In series, few compound (<strong>15-17</strong>) found excel

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Tavgeniene, Daiva, Raminta Beresneviciute, Dovydas Blazevicius, et al. "3-(N,N-Diphenylamino)carbazole Donor Containing Bipolar Derivatives with Very High Glass Transition Temperatures as Potential TADF Emitters for OLEDs." Coatings 12, no. 7 (2022): 932. http://dx.doi.org/10.3390/coatings12070932.

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Well-defined electroactive bipolar derivatives of new structure have been synthesized from 3-(N,N-diphenylamino)-9H-carbazole and bis(4-fluorophenyl)sulfone, 4-fluorophenylsulfone or 4,4′-difluorobenzophenone, respectively. The full characterization of their structure is described. The amorphous materials with very high glass transition temperatures of 111–173 °C also possess high thermal stability, with onset decomposition temperatures of 351–398 °C. Some of the compounds having the best solubility were tested as the emitters dispersed in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) host for pr

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Zander, Maximilian. "P-Typ-verzögerte Fluoreszenz von 1-Naphthyl-9-carbazyl-methan." Zeitschrift für Naturforschung A 41, no. 7 (1986): 971–73. http://dx.doi.org/10.1515/zna-1986-0712.

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P-tvpe Delayed Fluorescence o f 1-Naphthyl-9-carbazyl-methane At 77 K 1-naphthyl-9-carbazyl-methane adsorbed on filter paper shows predominantly delayed fluorescence o f the carbazole chromophore. The experimental findings are in agreement with the assumption that the carbazole chromophore after excitation by light absorption becomes first deactivated by intramolecular triplet-triplet energy transfer and then re-excited in a two-step mechanism including intermolecular naphthalene triplet-triplet annihilation and intramolecular singlet-singlet energy transfer from the naphthalene to the carbazo

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Wantulok, Jakub, Daniel Swoboda, Jacek E. Nycz, et al. "Direct Amination of Nitroquinoline Derivatives via Nucleophilic Displacement of Aromatic Hydrogen." Molecules 26, no. 7 (2021): 1857. http://dx.doi.org/10.3390/molecules26071857.

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The vicarious nucleophilic substitution of hydrogen (VNS) reaction in electron-deficient nitroquinolines was studied. Properties of all new products have been characterized by several techniques: MS, HRMS, FTIR, GC-MS, electronic absorption spectroscopy, and multinuclear NMR. The structures of 4-chloro-8-nitroquinoline, 8-(tert-butyl)-2-methyl-5-nitroquinoline, 9-(8-nitroquinolin-7-yl)-9H-carbazole and (Z)-7-(9H-carbazol-9-yl)-8-(hydroxyimino)quinolin-5(8H)-one were determined by single-crystal X-ray diffraction measurements. The 9-(8-nitroquinolin-7-yl)-9H-carbazole and (Z)-7-(9H-carbazol-9-y

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Golubeva, I. S., N. P. Yavorskaya, L. V. Ektova, et al. "ANTITUMOR ACTIVITY OF SOME DERIVATIVES OF INDOLO[2,3-A]CARBAZOLES N-GLYCOSIDES WITH XYLOSE CARBOHYDRATE RESIDUE." Russian Journal of Biotherapy 19, no. 4 (2020): 86–93. http://dx.doi.org/10.17650/1726-9784-2020-19-4-86-93.

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Introduction. The search for new antineoplastic agents in a series of indolo[2,3-a]-carbazole derivatives is an urgent and promising direction, since compounds with antitumor activity have been found in this class. In the chemical fusion laboratory, N.N. Blokhin National Medical Research Center оf the Ministry of Health of Russia has developed an original and effective method for the synthesis of glycosides of indolo[2,3-a]-pyrrolo[3,4-c]carbazoles, which makes it possible to synthesize derivatives of N-glycosides of indolo[2,3-a]carbazoles with different substituents in the heterocyclic parts

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Kobayashi, Masaya, and Tomohisa Kuzuyama. "Recent Advances in the Biosynthesis of Carbazoles Produced by Actinomycetes." Biomolecules 10, no. 8 (2020): 1147. http://dx.doi.org/10.3390/biom10081147.

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Structurally diverse carbazole alkaloids are valuable due to their pharmaceutical properties and have been isolated from nature. Experimental knowledge on carbazole biosynthesis is limited. The latest development of in silico analysis of the biosynthetic gene clusters for bacterial carbazoles has allowed studies on the biosynthesis of a carbazole skeleton, which was established by sequential enzyme-coupling reactions associated with an unprecedented carbazole synthase, a thiamine-dependent enzyme, and a ketosynthase-like enzyme. This review describes the carbazole biosynthetic mechanism, which

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Suleymanova, Alfiya F., Marsel Z. Shafikov, Adrian C. Whitwood, Rafał Czerwieniec, and Duncan W. Bruce. "Liquid-crystalline TADF materials based on substituted carbazoles and terephthalonitrile." Journal of Materials Chemistry C 9, no. 20 (2021): 6528–35. http://dx.doi.org/10.1039/d1tc00443c.

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Functionalising 2,5-di(N,N'-carbazolyl)terephthalonitrile or 2,3,5,6-tetra(N,N'-carbazolyl)terephthalonitrile on the carbazole moiety with alkoxy chains, gives a family of materials that show TADF response; two of them are also liquid crystalline.

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Kumar, V., J. Reisch, and A. Wickramasinghe. "Glycomaurin and Glycomaurrol, New Carbazole Alkaloids From Glycosmis mauritiana (Rutaceae) Bark." Australian Journal of Chemistry 42, no. 8 (1989): 1375. http://dx.doi.org/10.1071/ch9891375.

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The stem bark of Glycosmis mauritiana contained the acridone alkaloids noracronycine and des-N- methylacronycine, and two new carbazole alkaloids, 3,3,10-trimethyl-3,7-dihydropyrano[2,3-c] carbazole (glycomaurin) and 6-methyl-4-(3′-methylbut-2′-enyl)carbazol-3-ol (glycomaurrol), whose structures were confirmed by synthesis and by cyclization to dihydroglycomaurin respectively. Glycomaurin has a ring system which has not been previously found in nature.

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Choi, Kyung Hyun, Jae Min Kim, Won Jae Chung, and Jun Yeob Lee. "Effects of Substitution Position of Carbazole-Dibenzofuran Based High Triplet Energy Hosts to Device Stability of Blue Phosphorescent Organic Light-Emitting Diodes." Molecules 26, no. 9 (2021): 2804. http://dx.doi.org/10.3390/molecules26092804.

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High triplet energy hosts were developed through the modification of the substitution position of carbazole units. Two carbazole-dibenzofuran-derived compounds, 9,9′-(dibenzo[b,d]furan-2,6-diyl)bis(9H-carbazole) (26CzDBF) and 4,6-di(9H-carbazol-9-yl)dibenzo[b,d]furan (46CzDBF), were synthesized for achieving high triplet energy hosts. In comparison with the reported hole transport type host, 2,8-di(9H-carbazol-9-yl)dibenzo[b,d]furan (28CzDBF), 26CzDBF and 46CzDBF maintained high triplet energy over 2.95 eV. The device performances of the hosts were evaluated with electron transport type host,

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Shin, Dong Jin, Seung Chan Kim, and Jun Yeob Lee. "A reverse intersystem crossing managing assistant dopant for high external quantum efficiency red organic light-emitting diodes." Journal of Materials Chemistry C 10, no. 12 (2022): 4821–30. http://dx.doi.org/10.1039/d1tc04875a.

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Assistant dopants with reduced Dexter energy transfer rates were designed by replacing the donor moiety of 2,3,5,6-tetra(9H-carbazol-9-yl)terephthalonitrile (4CzTPN) with 5H-benzo[4,5]thieno[3,2-c]carbazole (BTCz).

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Saluja, Diksha, Prakash Seenu, Saravanan Enbanathan, and Sathiyanarayanan Kulathu Iyer. "Exploring the sensing properties of pH-sensitive carbazole-based AIE emitters and their applications in paper strip sensing." RSC Advances 15, no. 11 (2025): 8553–60. https://doi.org/10.1039/d4ra08882d.

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A novel carbazole-coupled phenanthridine molecule with an intense blue emissive fluorescence was produced through a two-step synthesis of 5-(4-(9H-carbazol-9-yl)phenyl)-7,8,13,14-tetrahydrodibenzo[a,i]phenanthridine (DSPH).

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Gehrmann, Robin, Tobias Hertlein, Elisa Hopke, Knut Ohlsen, Michael Lalk, and Andreas Hilgeroth. "Novel Small-Molecule Hybrid-Antibacterial Agents against S. aureus and MRSA Strains." Molecules 27, no. 1 (2021): 61. http://dx.doi.org/10.3390/molecules27010061.

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Ongoing resistance developments against antibiotics that also affect last-resort antibiotics require novel antibacterial compounds. Strategies to discover such novel structures have been dimerization or hybridization of known antibacterial agents. We found novel antibacterial agents by dimerization of indols and hybridization with carbazoles. They were obtained in a simple one-pot reaction as bisindole tetrahydrocarbazoles. Further oxidation led to bisindole carbazoles with varied substitutions of both the indole and the carbazole scaffold. Both the tetrahydrocarbazoles and the carbazoles have

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Prabakaran, Kumaresan, and Karnam Jayaramapillai Rajendra Prasad. "Synthesis of biogenetically possible 3-substituted pyrano-[2,3-a]carbazoles." Journal of Chemical Research 2009, no. 10 (2009): 619–22. http://dx.doi.org/10.3184/030823409x12523375431104.

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3-Substituted pyrano[2,3- a]carbazol-2(11 H)-ones have been synthesised by the reaction of 1-hydroxy-carbazole-2-carbaldehyde with malononitrile, ethyl cyanoacetate, Meldrum's acid, (carbethoxymethylene)triphenylphosphorane, ethyl benzoylacetate and phenylacetonitrile.

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Murali, Karunanidhi, Hazel A. Sparkes, Baskaran Vijaya Pandiyan, and Karnam Jayarampillai Rajendra Prasad. "Synthesis, photophysical properties and DFT analysis of highly substituted pyrido carbazole-based “push pull” chromophores." New Journal of Chemistry 41, no. 16 (2017): 8242–52. http://dx.doi.org/10.1039/c7nj00643h.

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A series of new fluorescent pyrido[2,3-a]carbazole derivatives were synthesized based on a four component reaction with 2,3,4,9-tetrahydro-1H-carbazol-1-one, malononitrile, and aryl/heteroaryl aldehydes in presence of NaOEt.

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Khan, Mati Ur Rehman, Anwar Abbas Khan, Syeda Aaliya Shehzadi, Rahat Ullah, Khurram Shahzad Munawar, and Muhammad Irfan. "Synthesis and Characterization of Novel Carbazole Based Dyes." Asian Journal of Chemistry 36, no. 12 (2024): 2843–47. https://doi.org/10.14233/ajchem.2024.32673.

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In this work, 9H-carbazole acted as precursor to synthesize a new organic dye, which involved the alkylation of carbazole with butyl bromide in the presence of phase transfer catalyst tetrabutylammonium bromide (TBAB) to give BC (9-butyl-9H-carbazole) followed by the formylation with hexamethylenetetramine (HMTA) in the presence of trifluoroacetic acid (TFA) and tetrahydrofuran (THF). Formyl groups at 3- and 3,6-positions afforded CC (9-butyl-9H-carbazole-3-carbaldehyde) and CD (9-butyl-9H-carbazole-3,6-dicarbaldehye), respectively. The formylation reaction with HMTA suffered with low yield, t

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Konidena, Rajendra Kumar, Kyung Hyung Lee, and Jun Yeob Lee. "Molecular design featuring carbazole-decorated 15H-diindolo[2,3-b:1′,2′,3′-lm]carbazole for improved efficiency and lifetime of thermally activated delayed fluorescence emitters." Journal of Materials Chemistry C 8, no. 7 (2020): 2491–99. http://dx.doi.org/10.1039/c9tc05855a.

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Zhang, Zunting, Yang Kang, Rong Hou, Xiaoyan Min, Tao Wang, and Yong Liang. "An Oxidant- and Catalyst-Free Synthesis of Dibenzo[a,c]carbazoles via UV Light Irradiation of 2,3-Diphenyl-1H-indoles." Synthesis 54, no. 06 (2021): 1621–32. http://dx.doi.org/10.1055/a-1677-4881.

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AbstractAn efficient methodology for the synthesis of dibenzo[a,c]carbazoles via annulation of 2,3-diphenyl-1H-indoles in EtOH under UV light irradiation (λ = 365 nm) along with hydrogen evolution is described. This method exhibits the advantages of mild reaction conditions, no requirement of any oxidants and catalysts, and release of hydrogen as the only byproduct. Notably, the mechanism investigation confirms that the trans-4b,8a-dihydro-9H-dibenzo[a,c]carbazole intermediate could convert into cis-4b,8a-dihydro-9H-dibenzo[a,c]carbazole, which relies on the nitrogen atom of the indole ring. T

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Çiçek, Baki, Merve Çağlı, Remziye Tülek, and Ali Teke. "Synthesis and optical characterization of bipod carbazole derivatives." Heterocyclic Communications 26, no. 1 (2020): 148–56. http://dx.doi.org/10.1515/hc-2020-0111.

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AbstractIn this study, some new biscarbazole derivatives were synthesized for the purpose of being used in OLED technologies and related areas. The following compounds: {1,2-bis(2-(3,6-diphenyl-9H-carbazole-9-yl) ethoxy)ethane (C-1), bis[2-(2-(3,6- diphenyl-9H-carbazole-9-yl) ethoxy)etyl]ether (C-2), bis[2-(2-(3,6-di(naphthalene-1-yl)-9H-carbazol-9-yl)ethoxy)etyl]ether (C-3) and bis [2-(2-(3,6-di(naphthalene-2-yl)-9H-carbazol-9-yl)ethoxy) ethyl]ether (C-4) were synthesized by Suzuki-Miyaura Cross Coupling reactions. The structural properties of the synthesized compounds were characterized by F

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Konidena, Rajendra Kumar, K. R. Justin Thomas, Snehasis Sahoo, Deepak Kumar Dubey, and Jwo-Huei Jou. "Multi-substituted deep-blue emitting carbazoles: a comparative study on photophysical and electroluminescence characteristics." Journal of Materials Chemistry C 5, no. 3 (2017): 709–26. http://dx.doi.org/10.1039/c6tc04870f.

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Cuong, Nguyen Manh, Heike Wilhelm, Andrea Porzel, and Ludger Wessjohann. "First Synthesis of Dimethyl-1H-Isochromeno[3,4-b]Carbazoles." Natural Product Communications 4, no. 7 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400708.

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The first synthesis of isochromene fused carbazols, (4a S, 13b R)-2,5,5-trimethyl-3,4,4a,5,8,13b-hexahydroisochromeno[3,4-b]carbazole (2) and its epi-isomer 3 by condensation of citral and 2-hydroxycarbazole using Ti(OEt)4 and MeAlCl2 as catalysts is described.

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Danish, Isravel Antony, and Karnam Jayarampillai Rajendra Prasad. "Synthesis of pyrazolino- and thiopyrimido- fused carbazoles from 2-ethylidene-3,4-dihydrocarbazol-1(2H)-ones." Journal of Chemical Research 2005, no. 2 (2005): 107–11. http://dx.doi.org/10.3184/0308234054497056.

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Annelated carbazoles namely, 3-methyl-1,2,3,3a,4,5,5a,10,10a,10b-decahydropyrazolino[4,5-a]carbazoles, 4a–e and 4-methyl-1,3,4,5,6,11-hexahydropyrimido[4,5-a]carbazole-2-thiones 5a–e were synthesised in excellent yields from 2-ethylidene-3,4-dihydrocarbazol-1(2H)-ones 2a–e, derived from the easily accessible 3,4-dihydrocarbazol-1(2H)-ones 1a–e.

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Sridharan, Makuteswaran, and Karnam J. R. Prasad. "Syntheses of Substituted Furo- and Pyrano-[2,3-a]carbazoles from 2-Cinnamoyl-1-hydroxycarbazoles." Zeitschrift für Naturforschung B 63, no. 9 (2008): 1112–16. http://dx.doi.org/10.1515/znb-2008-0916.

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Reaction of 2-cinnamoyl-1-hydroxycarbazoles 2a - d, with phenacyl bromide, mercuric acetate and H2O2/NaOH under different reaction conditions yielded 2-benzoyl-3-styryl-furo[2,3-a]carbazoles 3a-d, 2-benzylidene-furo[2,3-a]carbazol-3(10H)-ones 4a - d and 3-hydroxy-2-phenylpyrano- [2,3-a]carbazol-4(11H)-ones 5a - d, respectively.

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33

Takase, Masayoshi. "(Invited) Synthesis and Optical Properties of Circularly Accumulated Carbazole Oligomers." ECS Meeting Abstracts MA2024-01, no. 13 (2024): 1059. http://dx.doi.org/10.1149/ma2024-01131059mtgabs.

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Carbazole oligomers were synthesized to elucidate the physical properties arising from the interaction between circularly accumulated carbazoles. Aromatic nucleophilic substitution reactions were used to synthesize the target compounds, in which carbazoles were substituted for benzene, naphthalene, and anthracene. Structure-property relationships were evaluated by single-crystal structure analysis, theoretical calculations, and optical measurements including ultrafast time-resolved spectroscopy.

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34

Duda, Addison M., Thomas F. Guarr, Michael T. Giurini, and Jason G. Gillmore. "Intramolecular Oxidative Diaryl Coupling of Tetrasubstituted Diphenylamines for the Preparation of Bis(trifluoromethyl) Dimethyl Carbazoles." SynOpen 05, no. 04 (2021): 308–13. http://dx.doi.org/10.1055/a-1662-7462.

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AbstractSynthetic preparation of carbazoles can be challenging, requiring ring-building strategies and/or precious metal catalysts. Presented herein is a method for the preparation of carbazoles with the use of inexpensive and reliable hypervalent iodine chemistry. An oxidative single-electron-transfer (SET) event initiates cyclization for the preparation of our trifluoromethyl carbazoles. This method has been shown to be useful for a variety of bis(trifluoromethyl)carbazole isomers that are of primary interest for use as battery materials.

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35

Asiri, Abdullah M., Osman I. Osman, Saad H. Al-Thaqafy та Salman A. Khan. "Optical properties and fluorescence quenching of carbazole containing (D–π–A) push–pull chromophores by silver nanoparticles: a detailed insight via an experimental and theoretical approach". RSC Advances 7, № 14 (2017): 8402–14. http://dx.doi.org/10.1039/c6ra25741k.

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(4Z)-4-[(9-Ethyl-9H-carbazol-3-yl)methylidene]-2-phenyl-1,3-oxazol-5(4H)-one (ECPO) was prepared by the one-pot multi-component reaction of 9-ethyl-9H-carbazole-3-carbaldehyde, hippuric acid, anhydrous sodium acetate and acetic anhydride under microwave irradiation.

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36

Irgashev, Roman A., Nikita A. Kazin, Gennady L. Rusinov, and Valery N. Charushin. "Nitration of 5,11-dihydroindolo[3,2-b]carbazoles and synthetic applications of their nitro-substituted derivatives." Beilstein Journal of Organic Chemistry 13 (July 14, 2017): 1396–406. http://dx.doi.org/10.3762/bjoc.13.136.

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A new general approach to double nitration of 6,12-di(hetero)aryl-substituted and 6,12-unsubstituted 5,11-dialkyl-5,11-dihydroindolo[3,2-b]carbazoles by acetyl nitrate has been developed to obtain their 2,8-dinitro and 6,12-dinitro derivatives, respectively. A formation of mono-nitro derivatives (at C-2 or C-6) from the same indolo[3,2-b]carbazoles has also been observed in several cases. Reduction of 2-nitro and 2,8-dinitro derivatives with zinc powder and hydrochloric acid has afforded 2-amino- and 2,8-diamino-substituted indolo[3,2-b]carbazoles, while reduction of 6,12-dinitro derivatives u

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37

Alrashdi, Saad, Federica Casolari, Kwaku Kyeremeh, and Hai Deng. "Chemo-Enzymatic Synthesis of Bioactive Carbazole Derivatives." SynBio 2, no. 1 (2024): 21–30. http://dx.doi.org/10.3390/synbio2010002.

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Carbazoles are key scaffolds of either antimicrobial/antiviral alkaloid natural products or therapeutics. As such, access to structurally diverse indole-containing carbazoles has attracted considerable attention. In this report, a pilot study is described using biotransformation to provide carbazoles that contain various acyl substituents. The biotransformation system contains the thiamine-diphosphate (ThDP)-dependent enzyme NzsH, the FabH-like 3-ketoacyl-ACP synthase NzsJ, and the aromatase/cyclase NzsI, encoded in the biosynthetic gene cluster (nzs) of the bacterial carbazole alkaloid natura

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38

Minami, Yasunori, Tamejiro Hiyama, Takeshi Komiyama, et al. "Nickel-Catalyzed N-Arylation Using N-Trimethylsilyl-carbazole." Synlett 28, no. 18 (2017): 2407–10. http://dx.doi.org/10.1055/s-0036-1588417.

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Nickel-catalyzed N-arylation reaction of N-trimethylsilyl-carbazole using aryl bromides is found to proceed in the presence of sodium acetate, giving N-aryl-carbazoles in high yields. Under these conditions, N-trimethylsilyl-carbazole could react with aryl bromides selectively even in the presence of other N-trimethylsilyl-amines or N-H-amines. This arylation reaction was applied to the polymerization to provide a polycarbazole.

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Fraser, Heidi L., and Gordon W. Gribble. "A synthesis of 6,11-disubstituted benzo[b]carbazoles." Canadian Journal of Chemistry 79, no. 11 (2001): 1515–21. http://dx.doi.org/10.1139/v01-127.

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Sequential regioselective addition of organolithium reagents to indolo[1,2-b]isoquinoline-6,11-quinone (7) followed by sodium borohydride reduction of the intermediate diol 10, which is not isolated, affords 6,11-disubstituted 5H-benzo[b]carbazoles 11. The tandem combination of methyllithium and lithium triethylborohydride (Super Hydride) gives 6-methylbenzo[b]carbazole (24).Key words: benzo[b]carbazole, organolithiums, indolo[1,2-b]isoquinoline-6,11-quinone, ellipticine, indole.

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40

Kalogirou, Andreas S., and Panayiotis A. Koutentis. "5,5′-Bis[9-(2-ethylhexyl)-9H-carbazol-3-yl]-4,4′-diphenyl-2,2′-bithiazole." Molbank 2024, no. 1 (2024): M1761. http://dx.doi.org/10.3390/m1761.

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Stille coupling between 5,5′-dibromo-4,4′-diphenyl-2,2′-bithiazole and 9-(2-ethylhexyl)-3-(tributylstannyl)-9H-carbazole in the presence of Pd(Ph3P)2Cl2 in toluene, heated at reflux for 2 h, gave 5,5′-bis[9-(2-ethylhexyl)-9H-carbazol-3-yl]-4,4′-diphenyl-2,2′-bithiazole in 85% yield.

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41

Srour, Hassan, Thu-Hong Doan, Elisabeth Da Silva, Richard J. Whitby, and Bernhard Witulski. "Synthesis and molecular properties of methoxy-substituted diindolo[3,2-b:2′,3′-h]carbazoles for organic electronics obtained by a consecutive twofold Suzuki and twofold Cadogan reaction." Journal of Materials Chemistry C 4, no. 26 (2016): 6270–79. http://dx.doi.org/10.1039/c6tc02009g.

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A set of methoxy-substituted diindolo[3,2-b:2′,3′-h]carbazoles has been synthesized by twofold Suzuki–Miyaura, Cadogan andN-alkylation reactions starting fromN-hexyl-2,7-dibromo-3,6-dinitro carbazole.

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42

Caruso, Anna, Jessica Ceramella, Domenico Iacopetta, et al. "Carbazole Derivatives as Antiviral Agents: An Overview." Molecules 24, no. 10 (2019): 1912. http://dx.doi.org/10.3390/molecules24101912.

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Viruses represent the most common cause of infectious diseases worldwide and those with rapid propagation and high infection rates cause human and animal pandemics. These fast-spreading diseases are generally treated with antiviral drugs but, often, drug resistance occurs because of the ability of the pathogens to mutate rapidly and become less susceptible to the treatments. Even though new antivirals have been approved, e.g., in HIV (human immunodeficiency virus) and HCV (hepatitis C virus) therapeutic areas, the need to dispose of new pharmaceutical tools for the management of infections tha

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43

Kundu, Samrat, Ankush Banerjee, Shyam Chand Pal, Meghna Ghosh та Modhu Sudan Maji. "Cascade annulative π-extension for the rapid construction of carbazole based polyaromatic hydrocarbons". Chemical Communications 57, № 47 (2021): 5762–65. http://dx.doi.org/10.1039/d1cc00668a.

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Brønsted acid catalyzed cascade benzannulation strategy for the concise synthesis of benzo[a]carbazoles is reported. Efficacy of the methodology was further validated by synthesizing structurally diverse, extensive π-conjugated carbazole based PAHs.

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44

(Miss), B. CHOUDHURY, KUMAR P., ROY CHOUDHURY B., and P. DAS B. "Larvicidal Activity of some Carbazoles." Journal of Indian Chemical Society Vol. 68, Jan 1991 (1991): 64–65. https://doi.org/10.5281/zenodo.6101130.

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Durgapur Women's College. Durgapur and Department of Chemistry. Visva-Bharati, Santiniketan-731 235 <em>Manuscript received 29 May 1990. revised 8 October 1990, accepted 28 November 1990</em> In consideration of the biological properties of carbazoles<sup>1</sup> and our interest in the pesticidal and larvicidal activities<sup>2-4</sup> of carbazoles, we report here the preparation of some new carbazole derivatives with a view to examine their larvicidal activities. We also report the biological activities of these compounds as well as some carbazoles of known structures.

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45

Li, Yang, and Wentao Gao. "Synthesis of 3-(quinolin-2-yl)- and 3,6-bis(quinolin-2-yl)-9H-carbazoles." Beilstein Journal of Organic Chemistry 6 (October 8, 2010): 966–72. http://dx.doi.org/10.3762/bjoc.6.108.

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A simple and efficient synthesis of novel 3-(quinolin-2-yl)- and 3,6-bis(quinolin-2-yl)-9H-carbazoles, utilizing sodium ethoxide as a catalyst via a Friedländer condensation reaction between 3-acetyl-9-ethyl-9H-carbazole or 3,6-diacetyl-9-ethyl-9H-carbazole and β-aminoaldehydes or β-aminoketones is described. All of the title compounds were obtained in good yields of 52–72% and their structures were confirmed by IR, 1H NMR, MS, and elemental analysis.

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Chakraborty, M. "Mumunine - A New Carbazole Alkaloid from Murraya koenigii (Linn.) Spreng." Journal of Scientific Research 12, no. 4 (2020): 665–72. http://dx.doi.org/10.3329/jsr.v12i4.45499.

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The plant Murraya koenigii, commonly known as curry leaf tree is a rich source of carbazole alkaloids. A number of monomeric as well as dimeric carbazoles with C13, C18 and C23 skeleton have been isolated from the plant. In my present work, a new carbazole alkaloid, designated as mumunine, was isolated from the bark of Murraya koenigii (Linn) Spreng, along with a known carbazole alkaloid, viz. mahanimbine. The structure of the new alkaloid 1 was elucidated on the basis of 1D and 2D NMR spectral data analysis. In this paper, the isolation and structure elucidation of the new compound will be di

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47

Iqbal, Muhammad, Hina Mehmood, Jiaying Lv, and Ruimao Hua. "Base-Promoted SNAr Reactions of Fluoro- and Chloroarenes as a Route to N-Aryl Indoles and Carbazoles." Molecules 24, no. 6 (2019): 1145. http://dx.doi.org/10.3390/molecules24061145.

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KOH/DMSO-promoted C-N bond formation via nucleophilic aromatic substitution (SNAr) between chloroarenes or fluoroarenes with indoles and carbazole under transition metal-free conditions affording the corresponding N-arylated indoles and carbazoles has been developed.

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Lifshits, Liubov M., Bruce C. Noll, and Jeremy K. Klosterman. "A supramolecular approach for designing emissive solid-state carbazole arrays." Chemical Communications 51, no. 58 (2015): 11603–6. http://dx.doi.org/10.1039/c5cc03515e.

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Reactions of 5-(9H-carbazol-9-yl)-isophthalate and metal salts provide laminar metal organic frameworks (MOFs) wherein interlayer interactions of the pendant carbazoles engender extended aromatic stacks or non-stacked structures with enhanced solid-state emission.

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49

Yuan, Zhi-Guang, Qiang Wang, Ang Zheng, et al. "Visible light-photocatalysed carbazole synthesis via a formal (4+2) cycloaddition of indole-derived bromides and alkynes." Chemical Communications 52, no. 29 (2016): 5128–31. http://dx.doi.org/10.1039/c5cc10542k.

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We have developed an unprecedented route to carbazole by a visible light-photocatalysed formal (4+2) cycloaddition of indole-derived bromides and alkynes. Using this method, a wide range of highly functionalised carbazoles were produced in good yields under mild conditions.

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Kim, Hakjo, Chan-Hee Ryu, Miso Hong, Kang Mun Lee, Unhyeok Jo, and Youngjin Kang. "Blue Phosphorescent Pt(II) Compound Based on Tetradentate Carbazole/2,3′-Bipyridine Ligand and Its Application in Organic Light-Emitting Diodes." Molecules 29, no. 12 (2024): 2929. http://dx.doi.org/10.3390/molecules29122929.

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The tetradentate ligand, merging a carbazole unit with high triplet energy and dimethoxy bipyridine, renowned for its exceptional quantum efficiency in coordination with metals like Pt, is expected to demonstrate remarkable luminescent properties. However, instances of tetradentate ligands such as bipyridine-based pyridylcarbazole derivatives remain exceptionally scarce in the current literature. In this study, we developed a tetradentate ligand based on carbazole and 2,3′-bipyridine and successfully complexed it with Pt(II) ions. This novel compound (1) serves as a sky-blue phosphorescent mat

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