Search Results - "Braga, Antonio L."

Regioselective, Solvent- and Metal-Free Chalcogenation of Imidazo[1,2-a]pyridines by Employing I2/DMSO as the Catalytic Oxidation System by Rafique, Jamal, Saba, Sumbal, Rosário, Alisson R., Braga, Antonio L.

“…Highly efficient molecular‐iodine‐catalyzed chalcogenations (S and Se) of imidazo[1,2‐a]pyridines were achieved by using diorganoyl dichalcogenides under…”
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Synthesis of Unsymmetrical Diorganyl Chalcogenides under Greener Conditions: Use of an Iodine/DMSO System, Solvent- and Metal-Free Approach by Saba, Sumbal, Rafique, Jamal, Braga, Antonio L.

“…Herein, we report a greener iodine‐catalyzed protocol to access different types of unsymmetrical diorganyl chalcogenides. This new approach works in the…”
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"Green Is the Color": An Update on Ecofriendly Aspects of Organoselenium Chemistry by Azeredo, Juliano B, Penteado, Filipe, Nascimento, Vanessa, Sancineto, Luca, Braga, Antonio L, Lenardao, Eder João, Santi, Claudio

“…Organoselenium compounds have been successfully applied in biological, medicinal and material sciences, as well as a powerful tool for modern organic…”
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Light‐Mediated Seleno‐Functionalization of Organic Molecules: Recent Advances by Rafique, Jamal, Rampon, Daniel S., Azeredo, Juliano B., Coelho, Felipe L., Schneider, Paulo H., Braga, Antonio L.

“…Organoselenium compounds constitute an important class of substances with applications in the biological, medicinal and material sciences as well as in modern…”
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Catalytic Chalcogenylation under Greener Conditions: A Solvent-Free Sulfur- and Seleno-functionalization of Olefins via I2/DMSO Oxidant System by Vieira, André A, Azeredo, Juliano B, Godoi, Marcelo, Santi, Claudio, da Silva Júnior, Eufrânio N, Braga, Antonio L

“…Herein, we report a solvent- and metal-free methodology for the alkoxy-chalcogenylation of styrenes, using molecular iodine as a catalyst, DMSO as a…”
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Selenium-Derivative Compounds: A Review of New Perspectives in the Treatment of Alzheimer's Disease by Barbosa, Flavio A R, Canto, Rômulo F S, Teixeira, Kerolain F, de Souza, Anacleto S, de Oliveira, Aldo S, Braga, Antonio L

“…Alzheimer's disease (AD) is one of the most prevalent types of dementia, affecting millions of older people worldwide. AD is stimulating efforts to develop…”
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New Organochalcogen Multitarget Drug: Synthesis and Antioxidant and Antitumoral Activities of Chalcogenozidovudine Derivatives by de Souza, Diego, Mariano, Douglas O. C, Nedel, Fernanda, Schultze, Eduarda, Campos, Vinícius F, Seixas, Fabiana, da Silva, Rafael S, Munchen, Taiana S, Ilha, Vinicius, Dornelles, Luciano, Braga, Antonio L, Rocha, João B. T, Collares, Tiago, Rodrigues, Oscar E. D

“…In this article we present the synthesis, characterization, and in vitro biological and biochemical activities of new chalcogenozidovudine derivatives as…”
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Copper-Catalyzed Synthesis of Unsymmetrical Diorganyl Chalcogenides (Te/Se/S) from Boronic Acids under Solvent-Free Conditions by Saba, Sumbal, Botteselle, Giancarlo Vaccari, Godoi, Marcelo, Frizon, Tiago Elias Allievi, Galetto, Fábio Zazyki, Rafique, Jamal, Braga, Antonio L

“…The efficient and mild copper-catalyzed synthesis of unsymmetrical diorganyl chalcogenides under ligand- and solvent-free conditions is described. The…”
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Synthesis and mechanistic study of 2-(trifluoromethyl)-10H-phenoselenazine from double cross coupling reaction by Siqueira, Cássio, Ciancaleoni, Gianluca, Saba, Sumbal, Braga, Antonio L, Rafique, Jamal, Botteselle, Giancarlo V

“…Phenoselenazines are nitrogen and selenium-based heterocyclic compounds that have important biological activities. However, their preparation methods are…”
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Catalytic application of selenium and tellurium compounds as glutathione peroxidase enzyme mimetics by Alberto, Eduardo E, Nascimento, Vanessa do, Braga, Antonio L

“…This review covers the past decade of intensive research on the design, synthesis and screening of organoselenides and tellurides as catalyst able to mimic the…”
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Catalytic Antioxidant Activity of Bis-Aniline-Derived Diselenides as GPx Mimics by Botteselle, Giancarlo V., Elias, Welman C., Bettanin, Luana, Canto, Rômulo F. S., Salin, Drielly N. O., Barbosa, Flavio A. R., Saba, Sumbal, Gallardo, Hugo, Ciancaleoni, Gianluca, Domingos, Josiel B., Rafique, Jamal, Braga, Antonio L.

“…Herein, we describe a simple and efficient route to access aniline-derived diselenides and evaluate their antioxidant/GPx-mimetic properties. The diselenides…”
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Synthesis of Selenium-Quinone Hybrid Compounds with Potential Antitumor Activity via Rh-Catalyzed C-H Bond Activation and Click Reactions by Jardim, Guilherme A M, Lima, Daisy J B, Valença, Wagner O, Cavalcanti, Bruno C, Pessoa, Claudia, Rafique, Jamal, Braga, Antonio L, Jacob, Claus, da Silva Júnior, Eufrânio N, da Cruz, Eduardo H G

“…In continuation of our quest for new redox-modulating catalytic antitumor molecules, selenium-containing quinone-based 1,2,3-triazoles were synthesized using…”
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Synthesis and biological evaluation of new nitrogen-containing diselenides by Nascimento, Vanessa, Ferreira, Natasha L., Canto, Rômulo F.S., Schott, Karen L., Waczuk, Emily P., Sancineto, Luca, Santi, Claudio, Rocha, João B.T., Braga, Antonio L.

“…The antioxidant properties of organoselenium compounds have been extensively investigated with the aim of developing new drugs, since oxidative stress is…”
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Catalyst- and metal-free C(sp2)–H bond selenylation of (N-hetero)-arenes using diselenides and trichloroisocyanuric acid at room temperature by Neto, José S. S., Granja, Isis J. A., Scheide, Marcos R., Franco, Marcelo S., Moraes, Cassio A. O., Beatriz, Adilson, de Lima, Dênis P., Botteselle, Giancarlo V., Frizon, Tiago E. A., Saba, Sumbal, Rafique, Jamal, Braga, Antonio L.

“…In this paper, we report an eco-friendly approach for the C( sp 2 )–H bond selenylation of imidazopyridines and other N -heteroarenes as well as simple arenes…”
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Metal- and Solvent-Free Approach to Access 3‑Se/S-Chromones from the Cyclization of Enaminones in the Presence of Dichalcogenides Catalyzed by KIO3 by Rafique, Jamal, Saba, Sumbal, Schneider, Alex R, Franco, Marcelo S, Silva, Symara M, Braga, Antonio L

“…Herein, we describe a greener protocol for the one-pot synthesis of 3-Se/S-4H-chromen-4-ones. The desired products were obtained in good to excellent yields…”
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Inhibitory Effects of Mangifera indica Secondary Metabolites and Their Synthetic Derivatives against SARS-CoV‑2 Mpro and NS2B/NS3 (ZIKV and DENV-2) by B. Souza, Gabriella, M. Pontes, Carime L., de O. Costa, Geovanna, F. de Sousa, Natália, Tizziani, Tiago, E. Pollo, Luiz Antonio, Dambrós, Bibiana P., Scotti, Marcus T., Steindel, Mario, Braga, Antonio L., Schirmeister, Tanja, F. de Assis, Francisco, Sandjo, Louis P.

“…Chemical studies of Mangifera indica twigs yielded two compounds, identified as taraxerol (1) and methyl gallate (2). The galloyl moiety was suggested as a…”
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Acceleration of Arylzinc Formation and Its Enantioselective Addition to Aldehydes by Microwave Irradiation and Aziridine-2-methanol Catalysts by Braga, Antonio L, Paixão, Marcio W, Westermann, Bernhard, Schneider, Paulo H, Wessjohann, Ludger A

“…The formation and 2-amino alcohol catalyzed addition of arylzinc reagents from and with boronic acids, respectively, is drastically accelerated to a few…”
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Efficient Synthesis of Modular Amino Acid Derivatives Containing Selenium with Pronounced GPx‐Like Activity by Alberto, Eduardo E., Soares, Letiére C., Sudati, Jéssie H., Borges, Antonio C. A., Rocha, João B. T., Braga, Antonio L.

“…New chiral selenide‐ and diselenide amino acid derivatives have been synthesized. By a simple and efficient two‐step route, these new compounds were obtained…”
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Versatile Electrochemical Synthesis of Selenylbenzo[ b ]Furan Derivatives Through the Cyclization of 2-Alkynylphenols by Doerner, Carlos V, Scheide, Marcos R, Nicoleti, Celso R, Durigon, Daniele C, Idiarte, Vinícius D, Sousa, Martinho J A, Mendes, Samuel R, Saba, Sumbal, Neto, José S S, Martins, Guilherme M, Rafique, Jamal, Braga, Antonio L

“…We report an electrochemical oxidative intramolecular cyclization reaction between 2-alkynylphenol derivatives and different diselenides species to generate a…”
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Synthesis of 3-Selenylindoles under Eco­friendly Conditions by Ferreira, Natasha L., Azeredo, Juliano B., Fiorentin, Breno L., Braga, Antonio L.

“…The preparation of biologically relevant 3‐selenylindoles by a greener protocol by using a catalytic amount of K2CO3 and ethanol as a biosolvent in a system…”
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