Results 41 to 50 of about 35,228 (210)

Microwave Assisted Synthesis of Some New Fused 1,2,4-Triazines Bearing Thiophene Moieties With Expected Pharmacological Activity

open access: yesMolecules, 2011
Rapid and efficient solvent-free synthesis of 4-amino-3-mercapto-6-[2-(2-thienyl)vinyl]-1,2,4-triazin-5(4H)-one 1 under microwave irradiation is described. Some new fused heterobicyclic nitrogen systems such as 1,2,4-triazino[3,4-b][1,3,4]thiadiazinones,
Mosselhi A. Mosselhi   +2 more
doaj   +1 more source

Synthesis of 1,2,4-triazines and the triazinoisoquinolinedione DEF ring system of noelaquinone. [PDF]

open access: yesOrg Biomol Chem, 2012
The intramolecular Staudinger-aza-Wittig reaction is used for a general synthesis of 1,2,5,6-tetrahydro-1,2,4-triazines, a structural motif reported for the natural product noelaquinone.
Cao L   +4 more
europepmc   +2 more sources

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

open access: yesMaterials 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   +7 more
wiley   +1 more source

Oxaziridines: Versatile Reagents in Modern Organic Synthesis

open access: yesThe Chemical Record, EarlyView.
Being capable of transferring an O atom and N‐group/atom, oxaziridines are considered multitasking agents. These are employed for diverse organic transformations, such as epoxidation of olefins, α‐ and γ‐hydroxylation/amination of carbonyl compounds, oxidation of sulfides, [3+2]cycloaddition with unsaturated systems.
Ajeet Chandra   +2 more
wiley   +1 more source

Pyrazolo[4,3-e][1,2,4]triazines: Purine Analogues with Electronic Absorption in the Visible Region

open access: yesMolecules, 2005
Synthesis of several pryrazolo[4,3-e][1,2,4]-triazines is described. Theabsorption spectrum of some 5-substituted derivatives was found to extend to the visibleregion.
Jacek Wierzchowski   +2 more
doaj   +1 more source

MnO2-Mediated Oxidative Cyclization of “Formal” Schiff’s Bases: Easy Access to Diverse Naphthofuro-Annulated Triazines

open access: yesMolecules, 2022
A different type of MnO2-induced oxidative cyclization of dihydrotriazines has been developed. These dihydrotriazines are considered as a “formal” Schiff’s base.
Ramil F. Fatykhov   +9 more
doaj   +1 more source

Alkoxyallenes in Modern Synthesis: Reactivity, Catalysis, and Complexity Generation

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 17, 1 September 2026.
The last decade has witnessed a remarkable transformation in alkoxyallene chemistry. Although historically employed as synthetic equivalents of acrolein or as versatile 3C synthons, alkoxyallenes are now increasingly recognized as highly adaptable platforms for synthetic design.
A. Lanfranco   +5 more
wiley   +1 more source

Unexpected O–H Insertion of Rhodium-Azavinylcarbenes with N‑Acylhydrazones: Divergent Synthesis of 3,6-Disubstituted- and 3,5,6-Trisubstituted-1,2,4-Triazines

open access: yes, 2017
A practical and efficient method for divergent synthesis of 3,6-disubstituted- and 3,5,6-trisubstituted-1,2,4-triazines via unexpected rhodium-catalyzed O–H insertion/rearrangement/conditions-controlled intramolecular cyclization and oxidation reaction ...
Shiwei Zhang (2394778)   +5 more
core   +1 more source

Tailored Covalent Organic Framework Interphase Layer for High‐Performance Anode‐Free Lithium Metal Batteries

open access: yesAngewandte Chemie Novit, Volume 2, Issue 3, September 2026.
High‐performance anode‐free lithium (Li) metal batteries have been achieved using a covalent organic framework interphase layer, where its abundant nitrogen‐containing functional groups enable uniform Li+ adsorption and well‐defined porous architecture ensures dense Li metal deposition.
Zhaofeng Ouyang   +9 more
wiley   +1 more source

Direct CH/CH functionalization of 1,3-dihydroxy-9H-xanthen-9-one and 1,3-dimethoxy-9H-xanthen-9-one with 1,2,4-triazines and quinazoline

open access: yesChimica Techno Acta, 2020
An electron-deficient series of 1,2,4-triazines and quinazoline have been used for cross-dehydrogenative coupling with 1,3-dihydroxy and 1,3-dimethoxyxanthones to give stable nucleophilic addition products.
A. D. Sharapov   +3 more
doaj   +1 more source

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