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Relevant bibliographies by topics / 2-a] carbazole

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Journal articles

Academic literature on the topic '2-a] carbazole'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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Journal articles on the topic "2-a] carbazole"

1

Gao, Wentao, Meiru Zheng, and Yang Li. "A novel and facile synthesis of 3-(2-benzofuroyl)- and 3,6-bis(2-benzofuroyl)carbazole derivatives." Beilstein Journal of Organic Chemistry 7 (November 17, 2011): 1533–40. http://dx.doi.org/10.3762/bjoc.7.180.

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A facile synthesis of hitherto unreported 3-(2-benzofuroyl)carbazoles 3a–k, 3,6-bis(2-benzofuroyl)carbazoles 5a–k, and naphtho[2,1-b]furoylcarbazoles 3l and 5l is described. The synthesis mainly relies on the ultrasound-assisted Rap–Stoermer reaction of 3-chloroacetyl- (1) or 3,6-dichloroacetyl-9-ethyl-9H-carbazole (4) with various salicylaldehydes 2a–k as well as 2-hydroxy-1-naphthaldehyde (2l) in CH3CN with the presence of PEG-400 as catalyst. The procedure offers easy access to benzofuroylcarbazoles in short reaction times and the products are obtained in moderate to good yields.

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2

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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3

Benavides, Adriana, Hugo A. Jiménez-Vázquez, José Luis Avila-Melo, Alfredo Fuentes-Gutiérrez, and Joaquín Tamariz. "Total Synthesis of the Natural Carbazoles O-Demethylmurrayanine and Murrastanine A, and of a C4,C4′ Symmetric Murrastanine A Dimer from N-Phenyl-4,5-dimethylene-1,3-oxazolidin-2-one." Synthesis 53, no. 13 (2021): 2201–11. http://dx.doi.org/10.1055/a-1385-9052.

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AbstractThe synthesis of natural carbazoles O-demethylmurrayanine and murrastanine A starting from the title exo-heterocyclic diene is described. In the synthesis of murrastanine A, its symmetric C4,C4′ dimer can be obtained as the sole product under rather mild conditions. In all cases, the key intermediate is the same diarylamine. The carbazole nucleus is obtained through a Pd-promoted cyclization of the appropriate diarylamine. For the synthesis of O-demethylmurrayanine, the cyclization takes place on a silylated derivative. The crystal structures of murrayanine, two diarylamines, and two

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4

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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5

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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6

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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7

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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8

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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9

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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10

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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