Results 21 to 30 of about 45,356 (184)

Reactions of 3-amino-1,2,4-triazine with coupling reagents and electrophiles

Heterocyclic Communications, 2022
Analogs of a new heterocyclic system were obtained from the reactions of 3-amino-1,2,4-triazine with coupling reagents such as boronic acids, and terminal alkynes in the presence of a palladium catalyst.
Bvumbi Mpelegeng Victoria, Nemudzivhadi Anza Imanuel, Sengane Musiiwa Victoria, Moleele Simon Mnyakeni   +3 more
doaj   +1 more source

The Reaction of 1,6-Diamino-4-aryl-2-oxo-1,2-dihydropyridine- 3,5-Dicarbonitriles with Certain Electrophilic Agents

Chemistry Proceedings, 2023
The reaction of 1,6-diamino-2-oxo-1,2-dihydropyridine-3,5-dicarbonitriles, which are easily available through the reaction of cyanoacetohydrazide with arylmethylene malononitriles, with ninhydrin leads to the formation of novel dihydroindeno[1,2-e]pyrido[
Alexei A. Dolganov, Alexandra R. Chikava, Victor V. Dotsenko   +2 more
doaj   +1 more source

Ring Transformation of Oxazolo [3,2-b][1,2,4] Triazines [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1995
6-Methyl-2-phenyl-7H-Oxazolo [3,2-b] [1,2,4] triazine (1) undersent ting transformation on treatment with ammonia and primary amines to afford the corresponding imidazol [1,2-b][1,2,4] triazine (2).
Majid M. Heravi, Mehdi Bakavoli, Zohreh Sadjadi Hashemi   +2 more
doaj  

1,2,4-Triazine Chemistry Part I: Orientation of cyclization reactions of functionalized 1,2,4-triazine derivatives [PDF]

, 2010
Orientation of heterocyclization reactions of functionalized 1,2,4-triazines were studied by effect of substituents in 1,2,4-triazine moieties, type of the solvent used in the reaction and the temperature effect.
Reda Mohammady Abdel-Rahman, Abdel-Rahman, Reda Mohammady, Ali, Tarik El-Sayed, Magdy Ahmed Ibrahim, Makki, Mohammed Saleh Tawfik, Mohammed Saleh Tawfik Makki, Tarik El-Sayed Ali, Ibrahim, Magdy Ahmed   +7 more
core   +1 more source

Reactivity Studies of 5,6-Dimethyl- and 3,5,6-Trimethyl -1,2,4-Triazine–N4-Oxide Against Different Electrophiles

Molecules, 2000
It describes the regioselectivity studies of 5,6-Dimethyl-1,2,4-triazine-N4-oxide using different electrophiles.
H. Cerecetto, M. González, P. Saenz, G. Seoane   +3 more
doaj   +1 more source

The Reactions of Hydrazines with α-Lactams. Regiochemistry of Hydrazine Addition and Subsequent Ring Closure to N-Aminohydantoins or 1,2,4-Triazine-3,6-diones

, 2016
The Reactions of Hydrazines with α-Lactams. Regiochemistry of Hydrazine Addition and Subsequent Ring Closure to N-Aminohydantoins or 1,2,4-Triazine-3,6 ...
Robert V. Hoffman (3021594), Madhava M. Reddy (3046365), Curtis M. Klumas (3046362), Francisco Cervantes-Lee (2322364)   +3 more
core   +1 more source

Strain‐Promoted Reaction of 1,2,4‐Triazines with Bicyclononynes [PDF]

Chemistry – A European Journal, 2015
AbstractStrain‐promoted inverse electron‐demand Diels–Alder cycloaddition (SPIEDAC) reactions between 1,2,4,5‐tetrazines and strained dienophiles, such as bicyclononynes, are among the fastest bioorthogonal reactions. However, the synthesis of 1,2,4,5‐tetrazines is complex and can involve volatile reagents.
Horner, KA, Valette, NM, Webb, ME
openaire   +3 more sources

Corrosion‐Protection of T122 Steel Using g‐C3N5‐Embedded Epoxy Coatings

Materials and Corrosion, EarlyView.
Study evaluates g‐C3N5 (CN) reinforced epoxy coatings on T122 steel in NaCl and H2SO4. Electrochemical tests revealed that 2% loading maximizes corrosion resistance by blocking pores and limiting ion diffusion, increasing Rp and Rn. Optimized CN content enhances epoxy coating performance overall system durability material. ABSTRACT Corrosion‐protection
Martha Patricia Hernández‐Valencia, Tathagata Kar, Maura Casales‐Díaz, José Juan Ramos‐Hernández, América María Ramírez‐Arteaga, José Gonzalo González‐Rodríguez, Roy López‐Sesenes, Mohan Kumar Kesarla   +7 more
wiley   +1 more source

2-(5,6-Diphenyl-1,2,4-triazin-3-yl)aniline

Acta Crystallographica Section E, 2012
The title compound, C21H16N4, obtained under standard Suzuki cross-coupling conditions, is a model compound in the synthesis and biological activity evaluation of new aza-analogues of sildenafil containing a pyrazolo[4,3-e][1,2,4]triazine system.
Mariusz Mojzych, Zbigniew Karczmarzyk, Andrzej Fruziński   +2 more
doaj   +1 more source

Fast and Efficient Synthesis of Racemic Baloxavir Catalyzed by Strong Solid Acid under Microwave Conditions

Crystals, 2022
The compound (±)-12aR-12-[(11S)-7,8-difluoro-6,11-dihydrodibenzo[b,e]thiepin-11-yl]-7-hydroxy-3,4,12,12a-tetrahydro-1H-[1,4]oxazino[3,4-c]pyrido[2,1-f][1,2,4]triazine-6,8-dione is the intermediate of baloxavir marboxil.
Yiyun Wang, Xiaofang Lv, Zihui Meng, Zhibin Xu, Zhonghui Zheng, Jiarong Li, Min Xue   +6 more
doaj   +1 more source