Results 211 to 220 of about 29,559 (250)

Carbon-SO3H catalyzed expedient synthesis of new spiro-[indeno[1,2-b]quinoxaline-[11,2′]-thiazolidine]-4′-ones as biologically important scaffold

Synthetic Communications, 2019
In this report, we have described a convenient and eco-compatible approach for synthesis of new hybrid spiro[indeno[1,2-b]quinoxaline-[11,2′]-thiazolidine]-4′-ones (4a-k) via multi-component reaction of indeno[1,2-b]quinoxalinone, α-mercaptocarboxylic ...
Ruby Singh, Shakeel Ahmad Ganaie, Aakash Singh, A. Chaudhary   +3 more
semanticscholar   +1 more source

Quinoxaline and Pyrido[x,y-b]pyrazine Based Emitters: Tuning Normal Fluorescence to Thermally Activated Delayed Fluorescence and Emitting Color Over Entire Visible Light Range.

Chemistry, 2019
Quinoxaline (Q), pyrido[2,3-b]pyrazine (PP) and pyrido[3,4-b]pyrazine (iPP) are used as electron acceptors (A) to design a series of D-π-A type light-emitting materials with different donor (D) groups.
Tingting Huang, Di Liu, Jingyang Jiang, W. Jiang   +3 more
semanticscholar   +1 more source

The Chemistry and Applications of the Quinoxaline Compounds

Current organic chemistry, 2019
The quinoxaline derivatives are beneficial compounds because of their various medicinal and industrial applications. They are well-known for application in organic light emitting devices, polymers and pharmaceutical agents.
M. Soleymani, M. Chegeni
semanticscholar   +1 more source

Screening Quinoxaline-Type Donor Polymers for Roll-to-Roll Processing Compatible Organic Photovoltaics

ACS Applied Polymer Materials, 2019
We demonstrate, by screening a library of four derivatives of benzodithiophene–quinoxaline (BDT-QX)-based polymer, that BDT-QX are donor polymer candidates for large-scale coating of organic photov...
Audrey Laventure, Cayley R. Harding, Edward Cieplechowicz, Zhe Li, Ju Wang, Y. Zou, G. Welch   +6 more
semanticscholar   +1 more source

Amide–quinoxaline copolymers

Journal of Polymer Science Part A-1: Polymer Chemistry, 1972
AbstractA series of new amide–quinoxaline ordered copolymers derived from phthaloyl, isophthaloyl, and terephthaloyl chlorides have been synthesized and characterized. The isophthaloyl and terephthaloyl polymers had decomposition temperatures between 445–495°C and were soluble in a variety of solvents. These high molecular weight polymers were prepared
James V. Duffy, Joseph M. Augl
openaire   +1 more source

Quinoxaline-1,4-dioxide derivatives inhibitory action in melanoma and brain tumor cells.

Future Medicinal Chemistry, 2019
Aim: Quinoxaline-1,4-dioxide derivatives are synthetic heterocyclic compounds with multiple biological and pharmacological effects. In this study, we investigated the bioactivity of five quinoxaline-1,4-di-N-oxides derivatives in different animal cell ...
Liliana Silva, P. Coelho, R. Soares, C. Prudêncio, Mónica Vieira   +4 more
semanticscholar   +1 more source

Quinoxaline derivatives—III

Tetrahedron, 1964
Abstract Base catalysed intramolecular cyclization of α-cyano- o -nitroacetanilides (Ia–d) to the corresponding 2-cyano-3-hydroxyquinoxaline 1-oxides (IIa-d) is described, and a mechanism proposed. The cyanoquinoxaline N-oxides (IIa-d) on reduction are deoxygenated with simultaneous loss of the nitrile group, and when heated with concentrated aqueous
Yusuf Ahmad, M.S. Habib, null Ziauddin
openaire   +1 more source

Quinoxaline/phenylquinoxaline copolymers

Journal of Applied Polymer Science, 1977
AbstractThe thermal crosslinkability of the quinoxaline moiety incorporated within poly(phenylquinoxalines) was demonstrated by differential scanning calorimetry (DSC), torsional braid analysis (TBA), and high‐temperature adhesive evaluation. Several homopolymers, random copolymers, and polymer blends were prepared and evaluated.
openaire   +1 more source

Quinoxaline Sulfonamides

Journal of Medicinal Chemistry, 1965
S H, Dandegaonker, C K, Mesta
openaire   +2 more sources

Crosslinked polyamide‐quinoxalines

Journal of Polymer Science: Polymer Letters Edition, 1973
O, S, SO OR SO2 AND Y IS O-PHENYLENE, M-PHENYLENE, P-PHENYLENE OR- 1,2-DI(NH2-),4-((3,4-DI(NH2-)PHENYL)-X-)BENZENE WITH AN AMIDE OF THE FORMULA 1,3-BIS(PHENYL-CO-CO-Y-NH-CO-),5-(R-OOC-)BENZENE THESE POLYMERS FIND USE AS FILM OR COATINGS AND CAN ALSO BE MADE INTO FIBERS.
openaire   +1 more source