Results 121 to 130 of about 29,062 (270)

Vibronic Spin–Orbit Interactions in Heteroaromatic Molecules. II. Phosphorescence of Quinoxaline and Other Diazanaphthalenes [PDF]

, 1968
E. C. Lim, Jack M. H. Yu
openalex   +1 more source

[EMIM]AlCl4-ionic liquid catalyzed mechanochemically assisted green approach towards the synthesis of quinoxaline, 6H-indolo[2,3-b]quinoxaline and benzimidazole derivatives

Results in Chemistry
In the presented work, a convenient and effective methodology for the synthesis of quinoxaline, 6H-indolo[2,3-b]quinoxaline and benzimidazole derivatives has been developed.
Shafaque M. Shaikh, Gulafshan M. Ansari, Zobia Z. Karbari, Aditi A. Babre, Vikas V. Borge, Vikas M. Bangade, Damodara N. Kommi, Bhushan B. Popatkar   +7 more
doaj  

Ethyl 6′-cyano-7′-(p-tolyl)-1′,6′,7′,7a′-tetrahydro-3′H-spiro[indeno[1,2-b]quinoxaline-11,5′-pyrrolo[1,2-c]thiazole]-6′-carboxylate

IUCrData, 2019
The title compound, C31H26N4O2S, crystallizes in a triclinic centrosymmetric lattice with two molecules in the unit cell. The five-membered thiazole and pyrrolidine rings adopt twisted and envelope conformations, respectively.
C. Muthuselvi, M. Muthu, S. Athimoolam, B. Ravikumar, S. Pandiarajan, N. Srinivasan, R. V. Krishnakumar   +6 more
doaj   +1 more source

Corrigenda - Quinoxaline derivatives. VIII. Betaine structures of dihydroquinoxalinium and benzimidazolium barbiturates formed from o-dialkylaminoanilines and alloxan [PDF]

, 1964
JW Clark-Lewis, J. A. Edgar, JS Shannon, MJ Thompson   +3 more
openalex   +1 more source

Trimerization of 1,2‐Diaminocyclohexane Catalyzed by a Metal–Organic Cage Tandem Catalyst with Dual Biomimetic Active Sites

Advanced Science, Volume 12, Issue 27, July 17, 2025.
Dual biomimetic active sites, i.e., mononuclear {ZnII(L)(H2O)} and dinuclear {L2ZnII(CHO2)(OH)ZnIIL2}, have been successfully intergrated into a metal–organic cage, Zn20‐MOC. These two different active sites in Zn20‐MOC catalyze different steps of cascade trimerization of 1,2‐diaminocyclohexane. The mononuclear {ZnII(L)(H2O)} site catalyzes the initial
Xiao‐Jun Chai, Zhu Zhuo, Zi‐Ang Nan, Shiqiang Mu, Zhong‐Yu Peng, Ting Chen, Wei Wang, Li‐Feng Lin, Xi Meng, Mao‐Chun Hong, You‐Gui Huang   +10 more
wiley   +1 more source

Influence of amino acids on the formation of mutagenic/carcinogenic heterocydic amines in a model system [PDF]

, 2017
Mixtures of creatinine, glucose and various single amino acids were heated at 180°C for 10 min in an aqueous model system. The heated mixtures all showed mutagenic activity, ranging from 80 to 2400 TA98 revertant colonies/μmol creatinine with metabolic ...
Fay, Laurent B., Gross, Glan A., Johansson, Maria A.E., Jägerstad, Margaretha, Olsson, Kjell   +4 more
core  

Two dimensional Conjugated Metal–Organic Frameworks with Multiple Redox‐Active Sites towards High‐Performance Sodium‐Ion Battery

Advanced Science, Volume 12, Issue 26, July 10, 2025.
Three isoreticular Two dimensional (2D) conjugated metal–organic framework (2D c‐MOF) analogs with different redox‐active centers are synthesized as cathode materials for high‐performance sodium‐ion batteries. Notably, the [CuO4] and TTPQ (integrating both quinone and pyrazine structures) units within Cu‐TTPQ, serving as multiple redox‐active sites ...
Meiling Qi, Linqi Cheng, Xupeng Zhang, Yuzhao Guo, Xi Su, Xiaoxiao Sun, Yi Liu, Lei Wang, Heng‐Guo Wang, Long Chen   +9 more
wiley   +1 more source

The Synthesis of Quinoxaline Derivatives

Nippon kagaku zassi, 1961
α-ケトグルタル酸ジエチルに ο-フェニレンジアミンを作用させて得られるβ-(3-オキシ-2-キノキサリル)プロピオン酸エチルを,オキシ塩化リンにより閉環して, 1-エトキシ-4-クロル-3a,9b-ジヒドロピロロ[1.2-a]キノキサリン(VII)を合成し,VIIから 1-エトキシ-3a,9b-ジヒドロピロロ[1.2-a]キノキサリンおよび6-エトキシ-3a,3b,6a,10b-テトラヒドロ-1,2,4-トリアゾロ[4.3-a]ピロロ[2.1-c]キノキサリンを得た。β-プロム-α-ケトグルタル酸ジエチルとο-フェニレンジアミンから,β-ブロム-β-(3-オキシ-2-キノキサリル)プロピオン酸エチルを経由して,trans-β-(2-キノキサリル)アクリル酸誘導体を合成した。
openaire   +3 more sources

Testing Differently Substituted Quinoxaline‐2,3‐Dithiolate Ligands in Z‐Stereoretentive Olefin Metathesis Leading to Pheromone of Rice Yellow Stem Borer (Scirpophaga incertulas)

European Journal of Lipid Science and Technology, Volume 127, Issue 7, July 2025.
A set of Z‐stereoretentive olefin metathesis catalysts was tested in the synthesis of a pheromone of rice yellow stem borer (Scirpophaga incertulas)—one of the major rice pests in Asia. ABSTRACT Stereoselective olefin metathesis offers access to geometrically well‐defined C–C double bonds and is considered a promising new method for transforming plant ...
Maryana Nadirova, Łukasz Grzesiński, Artur Brotons‐Rufes, Albert Poater, Anna Kajetanowicz, Karol Grela   +5 more
wiley   +1 more source

A Systematic Review of Synthetic and Anticancer and Antimicrobial Activity of Quinazoline/Quinazolin‐4‐one Analogues

ChemistryOpen, Volume 14, Issue 7, July 2025.
Quinazoline represents an important class of heterocycles with diverse medicinal and pharmacological significance. This review systematically examines scholarly efforts toward understanding different synthetic pathways emphasizing the role of metal and non‐metal catalysts including some miscellaneous reagents employed in the synthesis of quinazoline ...
Neha Manhas, Gobind Kumar, Sanjeev Dhawan, Talent Makhanya, Parvesh Singh   +4 more
wiley   +1 more source