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Relevant bibliographies by topics / 6H-chromeno [4

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Journal articles

Academic literature on the topic '6H-chromeno [4'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "6H-chromeno [4"

1

Morteza, Shiri, Fathollahi-Lahroud Mina, and Yasaei Zahra. "A novel strategy for the synthesis of 6H-chromeno [4, 3-b] quinoline by intramolecular Heck cyclization." Tetrahedron 73, no. 17 (2017): 2501–3. https://doi.org/10.1016/j.tet.2017.03.043.

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A novel procedure for the synthesis of various derivatives of 6H-chromeno [4, 3-b] quinolines from intramolecular Heck reaction of 2-chloro-3-(phenoxymethyl) quinolines is described in this study. Intramolecular cyclization of N-alkylated indoles was efficiently investigated as well. The reaction is catalyzed by bis (triphenylphosphine) palladium (II) dichloride in acetonitrile at 80 °C.

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2

Zemanová, Ivana, Michaela Potančoková, and Renata Gašparová. "Synthesis of 4-OXO-4H-Chromene Derivative with Fused Benzodiazepine Ring." Nova Biotechnologica et Chimica 15, no. 1 (2016): 85–89. http://dx.doi.org/10.1515/nbec-2016-0009.

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Abstract 6-Acetylbenzo[b]chromeno[2,3-e][1,4]diazepin-13(6H)-one 6 was synthesized by reaction of 4- oxo-4H-chromene-3-carboxaldehyde 1 with 1,2-diaminobenzene 2 followed by cyclisation of formed Schiff base 3 and spontaneous oxidation of dihydrodiazepine 4 by air oxygen. Finally, diazepine 5 was acetylated at N(6) by reaction with acetic anhydride.

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3

Firoozpour, Loghman, Hoda Yahyavi, Ramona Ejtemaei, Setareh Moghimi, and Alireza Foroumadi. "A One-Pot, Three-Component, Solvent-Free Synthesis of Novel 6H-Chromeno[3’,4’:5,6]Pyrido[2,3-d]Pyrimidine-Triones under Microwave Irradiation." Journal of Chemical Research 42, no. 12 (2018): 604–7. http://dx.doi.org/10.3184/174751918x15414289771620.

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A green and efficient method for preparing novel heterocyclic systems is established through the reaction of differently substituted benzaldehydes, barbituric acid and 4-amino-2H-chromene-2-one under solvent-free conditions. This method affords 6H-chromeno[3’,4’:5,6] pyrido[2,3-d]pyrimidine-trione derivatives in high yields and short reaction times.

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4

Shokol, Tetyana, Natalia Gorbulenko, and Volodymyr Khilya. "Synthesis of chromones, annulated with oxygen-containing heterocycles with two hetero atoms at C(7)-C(8) bond." French-Ukrainian Journal of Chemistry 7, no. 1 (2019): 121–39. http://dx.doi.org/10.17721/fujcv7i1p121-139.

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The present review represented the advanced synthetic strategies for chromones annulated at the C(7)-C(8) bond with five-membered, six-membered, and seven-membered oxygen-containing heterocycles with two heteroatoms, such as 6H-[1,3]dioxolo[4,5-h]chromen-6-one, 2,3-dihydro-7H-[1,4]dioxino[2,3-h]chromen-7-one, 3,4-dihydro-2H,8H-[1,4]dioxepino[2,3-h]chromen-8-one, 2,3-dihydro-1H,7H-chromeno[7,8-b][1,4]oxazin-7-one, 4H,12H-pyrano[2,3-a]phenoxazine-4-one and 9,10-dihydro-4H,8H-chromeno[8,7-e][1,3]oxazin-4-one. The biological activity of naturally occurring and modified synthetic fused hetarenochro

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5

Mokhonova, Inna D., Evgenij A. Maksimov, Irina V. Ledenyona, Alevtina Y. Yegorova, and Khidmet S. Shikhaliev. "Reactions of 3H-furan-2-ones and 2H-chromen-2-ones with pyrazole-3(5)-diazonium salts." Heterocyclic Communications 24, no. 4 (2018): 183–85. http://dx.doi.org/10.1515/hc-2017-0192.

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AbstractDerivatives of the new heterocyclic system, 6H-chromeno[4,3-e]pyrazolo[5,1-c][1,2,4]triazin-6-one, were obtained by the reaction of pyrazole-3(5)-diazonium salts with 4-hydroxy-2H-chromen-2-one. Similar reactions with 5-phenyl-3H-furan-2-one followed by intramolecular heterocyclization furnished 6-(4-halophenyl)-7-alkyl-2-phenylfuro[2,3-e]pyrazolo[5,1-c][1,2,4]triazines.

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6

Ren, Demin, Xiaolian Hu, Yulin Huang, Xinliang Fu, and Xiaofang Li. "Synthesis of 6-Aryl-6H-Chromeno[4’,3’:4,5][1,3]Thiazolo[3,2-A]Benzimidazoles from 2-Aryl-3-Nitro-2H-Chromenes and 1H-Benzimidazole-2-Thiol." Journal of Chemical Research 42, no. 7 (2018): 374–76. http://dx.doi.org/10.3184/174751918x15314848760271.

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A number of 6-aryl-6H-chromeno[4’,3’:4,5][1,3]thiazolo[3,2-a]benzimidazole derivatives were synthesised by the reaction of 2-aryl-3-nitro-2H-chromenes with 1H-benzimidazole-2-thiol in the presence of Cu(OAc)2•H2O in moderate yields via successive C-N and C-S bond formations. The structures of all the products were characterised thoroughly by NMR and HRMS spectroscopy together with X-ray crystallographic analysis.

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7

Kumari, Sudesh, M. Rajeswari, and Jitender M. Khurana. "A Green Approach for the Synthesis of Novel 7,11-Dihydro-6H-chromeno[3,4-e]isoxazolo[5,4-b]pyridin-6-one Derivatives Using Acidic Ionic Liquid [C4mim][HSO4]." Australian Journal of Chemistry 69, no. 9 (2016): 1049. http://dx.doi.org/10.1071/ch16014.

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A multicomponent reaction capable of affording a wide range of novel 7,11-dihydro-6H-chromeno[3,4-e]isoxazolo[5,4-b]pyridin-6-one derivatives via one-pot three-component condensation of 4-hydroxycoumarin, aromatic aldehydes, and 5-amino-3-methylisoxazole in ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate ([C4mim][HSO4]) is reported. Structures have been confirmed by spectral and X-ray studies. Crystal packing of 4b has also been reported. Green solvent, short reaction time, easy workup, and high yields are the salient features of the present protocol.

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8

Litvinov, Yu M., and A. M. Shestopalov. "Convenient selective synthesis of 5,7,8,9-tetrahydro-4H,6H-chromeno[2,3-d][1,3]oxazin-4-ones." Russian Chemical Bulletin 58, no. 2 (2009): 479–81. http://dx.doi.org/10.1007/s11172-010-0037-z.

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9

Choudhary, M. Iqbal, Alain Meli Lannang, Shazia Anjum, Hoong-Kun Fun, David Lontsi, and Jean Gustave Tangmouo. "1,13-Dimethyl-6H,7H,8H-chromeno[3′,4′:5,6]pyrano[3,2-c]chromene-6,8-dione." Acta Crystallographica Section E Structure Reports Online 62, no. 1 (2005): o116—o118. http://dx.doi.org/10.1107/s1600536805040523.

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10

Swaminathan, K., K. Sethusankar, G. Siva Kumar, and M. Bakthadoss. "Crystal structures and conformational analyses of three pyranochromene derivatives." Acta Crystallographica Section E Crystallographic Communications 71, no. 8 (2015): 926–30. http://dx.doi.org/10.1107/s2056989015012967.

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The title compounds, C27H20O6, (I) [systematic name: methyl 7-oxo-14-phenyl-1H,7H,14H-pyrano[3,2-c:5,4-c′]dichromene-14a(6bH)-carboxylate], C24H22O5, (II) [systematic name: methyl 1-oxo-6-phenyl-2,3,4,12b-tetrahydro-1H,6H-chromeno[3,4-c]chromene-6a(7H)-carboxylate], and C25H23N3O4, (III) [systematic name: 6-(4-ethylphenyl)-2,4-dimethyl-1,3-dioxo-2,3,4,12b-tetrahydro-1H,6H-chromeno[4′,3′:4,5]pyrano[2,3-d]pyrimidine-6a(7H)-carbonitrile], are pyranochromene derivatives. The central pyran rings (B) of compounds (I) and (III) adopt half-chair conformations, whereas that of compound (II) adopts a so

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