Results 71 to 80 of about 29,559 (250)

2,3-Bis(4-bromophenyl)quinoxaline [PDF]

Acta Crystallographica Section E Structure Reports Online, 2007
The title compound, C(20)H(12)Br(2)N(2), was prepared by the reaction of 1-(3-bromo-phen-yl)-2-(4-bromo-phen-yl)ethane-1,2-dione with o-phenyl-enediamine in refluxing ethanol. In the mol-ecule, all bond lengths and angles are within normal ranges. The dihedral angle between the two benzene rings is 34.89 (1)°.
Fang-Fang Jian, Ke-Fei Wang, Rui-Rui Zhuang, Hai-Lian Xiao   +3 more
openaire   +3 more sources

Total Synthesis of the Cyanobacterial Alkaloid Nostodione A

European Journal of Organic Chemistry, Volume 29, Issue 2, January 16, 2026.
The total synthesis of the alkaloid nostodione A is successfully achieved utilizing 3,4‐dihydrocyclopenta[b]indole‐1,2‐dione as a key intermediate. The sensitive benzylidene moiety is introduced via a Knoevenagel condensation with p‐hydroxybenzaldehyde.
Oscar F. Casadiego‐Díaz, Ángel Rentería‐Gómez, Teresa Ramírez‐Apan, Rubén O. Torres‐Ochoa   +3 more
wiley   +1 more source

Ethyl 1′′-benzyl-1′-methyl-2′′-oxodispiro[indeno[1,2-b]quinoxaline-11,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxylate

Acta Crystallographica Section E, 2013
In the title compound, C36H30N4O3, the quinoxaline–indene system is roughly planar, with a maximum deviation from the mean plane of 0.218 Å for the C atom shared with the central pyrrolidine ring.
Piskala Subburaman Kannan, Srinu Lanka, Sathiah Thennarasu, Elumalai Govindan, Arunachalathevar SubbiahPandi   +4 more
doaj   +1 more source

Ultra‐Sensitive Short‐Wave Infrared Organic Photodetectors Enabled by a π‐Conjugation Extended Proquinoid Electron Acceptor

Advanced Functional Materials, Volume 36, Issue 5, 15 January 2026.
A novel proquinoid‐type electron acceptor, TQC‐4Cl, with an ultra‐narrow bandgap of 1.01 eV and spectral response beyond 1200 nm enables organic SWIR photodetectors. The optimized devices show a high EQE of 13.66% and high specific detectivity over 1012 Jones at 1200 nm under −0.5 V reverse bias with outstanding thermal stability, highlighting their ...
Yeonsu Choi, Se Jeong Park, Seunghyun Oh, Un‐Hak Lee, Seunghyun Rhee, Dong Ryeol Whang, Sein Chung, Juhyoung Jung, Kilwon Cho, Bo Ram Lee, Sung Cheol Yoon, Jae Won Shim, Seo‐Jin Ko   +12 more
wiley   +1 more source

Carbene–Metal–Amide Materials Design: Tailoring π‐Extended Amides for High‐Performance Organic Light‐Emitting Diodes

Advanced Science, Volume 13, Issue 6, 30 January 2026.
Sky‐blue and green thermally activated delayed fluorescent emitters, carbene–gold–amides (CMA), possess near unity photoluminescent quantum yields and high radiative rates up to 2.1 × 106 s−1. Organic light‐emitting diodes (OLED) emit sky‐blue electroluminescence with efficiency over 20%, including host‐free OLED architecture, with operating stability ...
Alexander C. Brannan, Jeoungmin Ji, Nguyen Le Phuoc, Donggyun Lee, Junho Kim, Mikko Linnolahti, Seunghyup Yoo, Alexander S. Romanov   +7 more
wiley   +1 more source

(4aR*,8aS*)-2,3-Diphenyl-4a,5,6,7,8,8a-hexahydroquinoxaline

Acta Crystallographica Section E, 2012
In the title compound, C20H20N2, the quinoxaline ring adopts a very distorted half-chair conformation [N=C—C=N = 22.7 (2)° for the nominally coplanar atoms] and the cyclohexane ring adopts a chair conformation.
W. Chen, K.-S. Tang, L.-Y. Fan
doaj   +1 more source

Discerning Blend Microstructure and Charge Recombination for Stable Biorenewable‐Based Organic Photovoltaics

Advanced Energy Materials, Volume 16, Issue 3, 21 January 2026.
A combination of morphological, electrical, and spectroscopy techniques is used to evaluate the degradation mechanisms of non‐fullerene (NFA)‐based organic photovoltaics (OPVs). Blends based on Y12 are more stable than Y6, aspeciallyOPVs from FO6‐T:Y12 demonstrated superior stability with an extrapolated T80 of over 2000 hours under maximum power point 
Eva Mazzolini, Zhuoran Qiao, Jolanda Muller, Francesco Furlan, Matteo Sanviti, Davide Nodari, Martina Rimmele, Alberto Collauto, Carsten Deibel, Martin Heeney, Jaime Martin, Flurin Eisner, Jenny Nelson, Nicola Gasparini, Julianna Panidi   +14 more
wiley   +1 more source

A Selective MAP3K1 Inhibitor Facilitates Discovery of NPM1 as a Member of the Network

Molecules
The quinoxaline core is found in several biologically active compounds, with Erdafitinib being the first FDA-approved quinoxaline derivative that targets a kinase and exhibits anti-cancer properties.
Lidia Boghean, Sarbjit Singh, Kiran K. Mangalaparthi, Smitha Kizhake, Lelisse Umeta, Donn Wishka, Paul Grothaus, Akhilesh Pandey, Amarnath Natarajan   +8 more
doaj   +1 more source

rac-(2R,3S)-2-Phenyl-3-(3-phenyl-1,2,3,4-tetrahydroquinoxalin-2-yl)quinoxaline

Acta Crystallographica Section E, 2008
The title compound, C28H22N4, is the unexpected by-product of the reaction of 2-hydroxyacetophenone and 1,2-diaminobenzene under iodine catalysis, during which a carbon–carbon σ-bond between two quinoxaline units was formed.
Sven Ammermann, Constantin Daniliuc, Peter G. Jones, Wolf-Walther du Mont, Hans-Hermann Johannes   +4 more
doaj   +1 more source

Studies in Benzimidazo Thiazolo Quinoxalines and Benzimidazo Thiazino Quinoxalines

, 1970
Benzimidazo (2', 1': 2, 3) thiazolo (4, 5-b) quinoxalines and 7H-benzimidazo (1', 2': 4, 5) (1 : 4) thiazino (2, 3-b) quinoxalines have been synthesised by the condensations of 2-mercapto benzimidazoles with 2 : 3-dichloro quinoxalines and 2-(mercaptomethyl) benzimidazole with 2 : 3-dichloro quinoxalines respectively.
Simran Singh, Singh, Chanan, K. S. Narang   +2 more
openaire   +1 more source