1684-14-6Relevant academic research and scientific papers
Green and efficient synthesis of quinoxaline derivatives via ceric ammonium nitrate promoted and in situ aerobic oxidation of α-hydroxy ketones and α-keto oximes in aqueous media
Shaabani, Ahmad,Maleki, Ali
, p. 79 - 81 (2008)
The direct conversion of α-hydroxy ketones and α-keto oximes into quinoxaline derivatives in the presence of a catalytic amount of ceric ammonium nitrate via metal-catalyzed aerobic oxidation followed by in situ trapping with aromatic 1,2-diamines in water as a green and efficient reaction media, is reported.
Quinoxaline synthesis from α-hydroxy ketones via a tandem oxidation process using catalysed aerobic oxidation
Robinson, Ross S.,Taylor, Richard J. K.
, p. 1003 - 1005 (2005)
The direct conversion of α-hydroxy ketones into quinoxalines via metal-catalysed aerobic oxidation followed by in situ trapping with aromatic 1,2-diamines is reported. Catalyst screening indicated that these transformations could be carried out efficiently using 2 mol% Pd(OAc) 2 or RuCl2(PPh3)3-TEMPO; the palladium system was utilised for a range of transformations.
Comprehensive experimental investigation of mechanically induced 1,4-diazines synthesis in solid state
Oliveira, Paulo F.M.,Haruta, Naoki,Chamayou, Alain,Guidetti, Brigitte,Baltas, Michel,Tanaka, Kazuyoshi,Sato, Tohru,Baron, Michel
, p. 2305 - 2310 (2017)
Compared mechanosynthesis of two condensed 1,4-diazines were investigated in ball milling conditions from o-phenylenediamine. 13C CP-MAS NMR revealed a hemiaminal intermediate for dibenzo[a,c]phenazine synthesis accumulated under mechanical act
Highly efficient synthesis of quinoxaline derivatives catalized by iridium complex
Lv,Xie,Gu,Wu,Wan
, p. 2887 - 2890 (2016)
A novel iridium complex was used to catalyze a mild reaction of phenylenediamine with propanediol that led to formation of quinoxaline derivatives with moderate to high yields. The reaction diemonstrated strong compatibility with substrates bearing various functional groups.
2-Iodo benzoic acid: An unconventional precursor for the one pot multi-component synthesis of quinoxaline using organo Cu (II) catalyst
Saha, Bittu,Mitra, Bijeta,Brahmin, Dhiraj,Sinha, Biswajit,Ghosh, Pranab
, p. 3657 - 3663 (2018)
This is the first reported, unconventional, efficient strategy for the synthesis of quinoxaline from 2 to iodo benzoic acid and sodium azide in presence of organo Cu (II) catalyst. Herein, a very simple, versatile one pot multi-component protocol for the synthesis of biologically active compound, quinoxaline has been described via Schmidt reaction and the nucleophilic substitution reaction. The isolated compounds were characterized by 1H NMR, 13C NMR. Our reported organo catalyst was characterized by single crystal XRD, SEM.
Synthesis, characterization and catalytic activity of oxovanadium(IV) complexes of heterocyclic acid hydrazones
Pandey, Manju,Sunaja Devi,Sreeja
, p. 4135 - 4137 (2015)
Two acid hydrazones, furan-2-carbaldehyde nicotinic hydrazone (L1) and furan-2-carbaldehyde benzhydrazone (L2) have been synthesized and they are characterized by elemental analysis, IR, NMR and UV spectral analysis. Oxovanadium(IV) complexes of these two
Biomass into chemicals: One-pot two- and three-step synthesis of quinoxalines from biomass-derived glycols and 1,2-dinitrobenzene derivatives using supported gold nanoparticles as catalysts
Climent,Corma,Hernandez,Hungria,Iborra,Martinez-Silvestre
, p. 118 - 129 (2012)
An efficient and selective one-pot two-step method, for the synthesis of quinoxalines by oxidative coupling of vicinal diols with 1,2-phenylenediamine derivatives, has been developed by using gold nanoparticles supported on nanoparticulated ceria (Au/CeO2) or hydrotalcite (Au/HT) as catalysts and air as oxidant, in the absence of any homogeneous base. Reaction kinetics shows that the reaction controlling step is the oxidation of the diol to α-hydroxycarbonyl compound. Furthermore, a one-pot three-step synthesis of 2-methylquinoxaline starting from 1,2-dinitrobenzene and 1,2-propanediol has been successfully carried out with 98% conversion and 83% global yield to the final product.
Synthesis of new polyaza heterocycles. Part 42: Diazines
Darabantu, Mircea,Boully, Ludovic,Turck, Alain,Plé, Nelly
, p. 2897 - 2905 (2005)
Using Pd-catalyzed Stille cross-coupling reactions, we report here the synthesis of various mono- or bis(tri-n-butylstannyl)diazines which were reacted with various halogenated diazines to access to various polyaza heterocyclic derivatives.
Tungstophosphoric acid/mesoporous silicas as suitable catalysts in quinoxaline synthesis
Langer, Peter,Luque, Rafael,Palermo, Valeria,Pizzio, Luis R.,Romanelli, Gustavo P.,Sosa, Alexis A.
, (2021/12/16)
Quinoxalines and their derivatives are of great value in the chemical and biological sciences. These compounds are found in dyes, agrochemicals, and are used as building blocks of drugs for the treatment of different diseases. Quinoxalines and their deriv
Synthesis, characterization and application of α-Ca3 (PO4)2 as a heterogeneous catalyst for the synthesis of 2.3-diphenylquinoxaline derivatives and knoevenagel condensation under green conditions
Anahmadi, Haddou,Benzekri, Zakaria,Boukhris, Said,El hajri, Fatima,El youbi, Mohamed Salahdine,Fathi, Majda,Idrissi, Brahim Chafik El,Sibous, Sarra,Souizi, Abdelaziz
, (2021/09/20)
Green chemistry is now paramount in modern life and industrial sector. It has become a research priority and a scientific challenge. In this study, alpha-tricalcic phosphate was prepared as a green catalytic medium. This medium has been characterized by v
