Results 21 to 30 of about 29,559 (250)

Synthesis of 2-(Quinoxalin-2-yl)acetamides and Their Preliminary Cytotoxic and Antibacterial Activity. [PDF]

Chem Biodivers
ABSTRACT Quinoxaline is an aza‐heterocycle found in some bioactive compounds. Thus, to enhance the pharmacological scope of this nucleus, we report a series of 19 acetamides decorated with a quinoxaline core. The synthesis involved the linkage of previously constructed bromoacetamides and hydroxyphenyl quinoxalines via an SN2 reaction. The first series
Tovar-Roman CE, Hernández-Vázquez E, Rivera-Chávez JA.   +2 more
europepmc   +2 more sources

Furan‐modified thiadiazolo quinoxaline as an electron acceptor for constructing second near‐infrared aggregation‐induced emission fluorophores for beyond 1300 nm fluorescence/photoacoustic imaging and photothermal therapy

Aggregate, 2023
Creation of new fluorophores is important for understanding the structure–property relationship, by which the required optical properties are likely to be attained.
Mengke Liang, Luyu Liu, Ying Sun, Jia Li, Ling'e Zhang, Xiqun Jiang, Wei Wu   +6 more
semanticscholar   +1 more source

Sulfide‐Bridged Covalent Quinoxaline Frameworks for Lithium–Organosulfide Batteries

Advances in Materials, 2023
The chelating ability of quinoxaline cores and the redox activity of organosulfide bridges in layered covalent organic frameworks (COFs) offer dual active sites for reversible lithium (Li)‐storage.
Sattwick Haldar, Preeti Bhauriyal, Anthony R Ramuglia, Arafat H Khan, S. de Kock, Arpan Hazra, V. Bon, Dominik L. Pastoetter, Sebastian Kirchhoff, Leonid Shupletsov, Ankita De, M. Isaacs, Xinliang Feng, Michael Walter, E. Brunner, I. Weidinger, T. Heine, A. Schneemann, S. Kaskel   +18 more
semanticscholar   +1 more source

Synthesis of novel antibacterial and antifungal quinoxaline derivatives

RSC Advances, 2022
A series of quinoxaline derivatives were designed, synthesized and evaluated as antimicrobial agents against plant pathogenic bacteria and fungi. Some of these compounds exhibited significant antibacterial and antifungal activities in vitro.
Xu Tang, Qing Zhou, W. Zhan, Die Hu, Ran Zhou, Nan Sun, Shuai Chen, Wenneng Wu, Wei Xue   +8 more
semanticscholar   +1 more source

Synthesis, characterization, and biological target prediction of novel 1,3-dithiolo[4,5-b]quinoxaline and thiazolo[4,5-b]quinoxaline derivatives

Heterocyclic Communications, 2023
Quinoxalines are a family of nitrogen-based heterocyclic compounds that have garnered much interest because of their wide range of applications. 2,3-Dichloroquinoxaline is an aromatic molecule that frequently serves as a synthetic intermediate in ...
El-Gaby Mohamed S. A., Ammar Yousry A., Ismail Mostafa A., Ragab Ahmed, Abusaif Moustafa S.   +4 more
doaj   +1 more source

2,3-Diethylbenzo[g]quinoxaline [PDF]

IUCrData, 2020
The title compound, C16H16N2, was synthesized by dispersing 3,4-hexanedione in a methanol–water solution containing the acid catalyst NH4HF2, then adding 1,2-diaminonaphthalene. The fused-ring system of the title compound is close to planar (r.m.s. deviation = 0.028 Å); one of the pendant methyl C atoms lies close to the ring plane [deviation = 0.071 ...
Guy Crundwell, Ashley Leeds
openaire   +3 more sources

Synthesis, Characterization and Protonation Behavior of Quinoxaline-Fused Porphycenes

Molecules, 2017
9,10-Quinoxaline-fused porphycenes 1a-H2 and 1b-H2 were synthesized by intramolecular McMurry coupling. As a result of the annulation of the quinoxaline moiety on the porphycene skeleton, 1a-H2 and 1b-H2 display absorption and fluorescence in the near ...
Daiki Kuzuhara, Mika Sakaguchi, Wataru Furukawa, Takuya Okabe, Naoki Aratani, Hiroko Yamada   +5 more
doaj   +1 more source

2-(3-Nitrophenoxy)quinoxaline [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title mol-ecule, C(14)H(9)N(3)O(3), the dihedral angle between the quinoxaline and benzene rings is 77.13 (9)°. The mol-ecule is twisted about the ether-benzene O-C bond, with a C-O-C-C torsion angle of -102.8 (2)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming layers in the ab plane, with one nitro O atom accepting two ...
Hassan, N.D., Abdullah, Z., Tajuddin, Hairul Anuar, Fairuz, Z.A., Ng, S.W., Tiekink, E.R.T.   +5 more
openaire   +4 more sources

Synthesis, Biological Evaluation and Structure-Activity Relationships of New Quinoxaline Derivatives as Anti-Plasmodium falciparum Agents

Molecules, 2014
We report the synthesis and antimalarial activities of eighteen quinoxaline and quinoxaline 1,4-di-N-oxide derivatives, eight of which are completely novel. Compounds 1a and 2a were the most active against Plasmodium falciparum strains.
Ana Gil, Adriana Pabón, Silvia Galiano, Asunción Burguete, Silvia Pérez-Silanes, Eric Deharo, Antonio Monge, Ignacio Aldana   +7 more
doaj   +1 more source

(Phenyl)(3-phenylsulfonyl-1,2-dihydropyrrolo[1,2-a]quinoxalin-1-yl)methanone

Acta Crystallographica Section E, 2011
In the title molecule, C24H18N2O3S, the 13-atom ring system comprising the quinoxaline and fused five-membered ring exhibits an r.m.s. deviation from coplanarity of 0.039 Å, with a maximum deviation of 0.0710 (10)&#8197 ...
Yaşar Dürüst, Akın Sağırlı, Frank R. Fronczek   +2 more
doaj   +1 more source