Results 81 to 90 of about 29,559 (250)

One-pot three-component synthesis of quinoxaline and phenazine ring systems using Fischer carbene complexes

Beilstein Journal of Organic Chemistry, 2010
One-pot three-component coupling of o-alkynylheteroaryl carbonyl derivatives with Fischer carbene complexes and dienophiles leading to the synthesis of quinoxaline and phenazine ring systems has been investigated. This involves the generation of furo[3,4-
Priyabrata Roy, Binay Krishna Ghorai
doaj   +1 more source

SYNTHESIS OF QUINOXALINES

, 2023
Quinoxalines are a group of antibiotics widely used in medicine to fight bacterial infections.These antibiotics have a broad spectrum of action and belong to the class of 4 quinolones. Theirmechanism of action is based on inhibiting the activity of bacterial enzymes responsible for DNAsynthesis, which leads to their death. Due to this, quinoxalines are
openaire   +1 more source

Ethyl 2-(3-oxo-1,2,3,4-tetrahydroquinoxalin-2-yl)acetate

IUCrData, 2018
In the title compound, C12H14N2O3, the conformation of the ester substituent is partially determined by an intramolecular N—H...O hydrogen bond. The crystal packing consists of layers parallel to (\overline{1}12) held together by N—H...O and C—H...O ...
Nadeem Abad, Jihad Sebhaoui, Youness El Bakri, Youssef Ramli, El Mokhtar Essassi, Joel T. Mague   +5 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of 3-phenyl-1-{3-[(3-phenylquinoxalin-2-yl)oxy]propyl}-1,2-dihydroquinoxalin-2-one

Acta Crystallographica Section E: Crystallographic Communications
In the title compound, C31H24N4O2, the quinoxaline units are distinctly non-planar and twisted end-to-end. In the crystal, C—H...O and C—H...N hydrogen bonds link the molecules into chains extending along the a-axis direction.
Nadeem Abad, Joel T. Mague, Abdulsalam Alsubari, El Mokhtar Essassi, Abdullah Yahya Abdullah Alzahrani, Youssef Ramli   +5 more
doaj   +1 more source

High Performance Near-Infrared Emitters with Methylated Triphenylamine and Thiadiazolo[3,4-g]quinoxaline-Based Fluorophores [PDF]

, 2021
You‐Ming Zhang, Chengjun Wu, Minrong Zhu, Jingsheng Miao   +3 more
openalex   +1 more source

Functionalized Quinoxaline for Chromogenic and Fluorogenic Anion Sensing

ChemistryOpen, 2018
This Review article provides a comprehensive analysis of recent examples reported in the field of quinoxaline‐based chromogenic and fluorogenic chemosensors for inorganic anions such as fluoride, cyanide, acetate, and phosphate, as well as their utility ...
S. Dey, Mohammad Al Kobaisi, S. Bhosale
semanticscholar   +1 more source

2-Phenylthieno[2,3-b]quinoxaline

Acta Crystallographica Section E Structure Reports Online, 2012
The title compound, C(16)H(10)N(2)S, is almost planar (r.m.s. deviation for all non-H atoms = 0.080 Å). The dihedral angle between the three fused-ring system and the phenyl ring is 9.26 (3)°. The S atom and the opposite C atom of the thio-phene ring are mutually disordered with an occupancy ratio of 0.7706 (19):0.2294 (19).
Youssef Ramli, H. Zouihri, M. Azize, Ahmed Moussaif, El Mokhtar Essassi   +4 more
openaire   +3 more sources

6,7-Dichloro-2,3-bis(pyridin-2-yl)quinoxaline [PDF]

, 2015
Guy Crundwell, Neil M. Glagovich, Melissa E. King   +2 more
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Compounds Containing 2,3‐Bis(phenylamino) Quinoxaline Exhibit Activity Against Methicillin‐Resistant Staphylococcus aureus, Enterococcus faecalis, and Their Biofilms

MicrobiologyOpen
Antimicrobial resistance remains a global issue, hindering the control of bacterial infections. This study examined the antimicrobial properties of 2,3‐N,N‐diphenyl quinoxaline derivatives against Gram‐positive, Gram‐negative, and Mycobacterium species ...
Gilda Padalino, Katrina Duggan, Luis A. J. Mur, Jean‐Yves Maillard, Andrea Brancale, Karl F. Hoffmann   +5 more
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An Efficient and Recyclable Nanoparticle-Supported Cobalt Catalyst for Quinoxaline Synthesis [PDF]

, 2015
Fatemeh Rajabi, Diego Alves, Rafael Luque   +2 more
openalex   +1 more source