JBCS

18:15, Thu Nov 21

Open Access/APCs

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vol. 34, No. 10, 2023, p. 1373-1540

 

Sulfonic acids can catalyze the formation of imines from aldehydes and amines in aprotic solvents even in trace amounts. Details are presented in the Article Formation of α,β-Unsaturated Imines in Apolar Aprotic Solvent: Effect of Hidden Acid Catalysts Analyzed by Theoretical Calculations by Virginia C. Rufino and Josefredo R. Pliego Jr. on page 1499.


Cover Article
J. Braz. Chem. Soc. 2023, 34(10), 1499-1508

Formation of α,β-Unsaturated Imines in Apolar Aprotic Solvent: Effect of Hidden Acid Catalysts Analyzed by Theoretical Calculations

Virginia C. Rufino; Josefredo R. Pliego Jr.

How to cite this article

Sulfonic acids can catalyze the formation of imines from aldehydes and amines in aprotic solvents even in trace amounts. Details are presented in the Article Formation of α,β-Unsaturated Imines in Apolar Aprotic Solvent: Effect of Hidden Acid Catalysts Analyzed by Theoretical Calculations by Virginia C. Rufino and Josefredo R. Pliego Jr. on page 1499.

https://dx.doi.org/10.21577/0103-5053.20230063

Published online: May 2, 2023
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Articles J. Braz. Chem. Soc. 2023, 34(10), 1373-1379

Gelation Behavior of Polyacrylamide-Polyethyleneimine: Effects of Diethylenetriamine and Glycerol Addition

Nívia N. Marques ; Stéphanie C. de Morais ; Paulo C. F. da Câmara ; Elessandre A. de Souza; Rosangela C. Balaban

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Diethylenetriamine (DETA) and glycerol on the gelation process of polyacrylamide (PAM)-polyethyleneimine (PEI) formulations.

https://dx.doi.org/10.21577/0103-5053.20230049

Published online: April 6, 2023

 

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J. Braz. Chem. Soc. 2023, 34(10), 1380-1397

Solvatochromism and Thermochromism of Fluconazole: An Experimental and Theoretical Study

Fernando G. Olivares ; Francisco G. Lazcano; Marcelo O. Castillo; Maria G. Barúa; Juan P. Escalada; Graciela Pinto Vitorino

How to cite this article

 

Theoretical and experimental solvatochromic study of fluconazole distinguishes the solvent polarizability, dispersion, and electronic induction as the main parameters that justify solute-solvent interaction. The three pKa values of fluconazole were evidenced by thermochromism.

https://dx.doi.org/10.21577/0103-5053.20230050

Published online: April 11, 2023

 

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J. Braz. Chem. Soc. 2023, 34(10), 1398-1409

Unraveling the Metabolomic Profile and Bioactivities of the Paratoid Gland Secretion from
Rhinella granulosa

Elcio Daniel S. Barros; Evaldo S. Monção Filho; Mariluce G. Fonseca; Patrícia S. Alves; Antônia Laíres S. Santos; Chistiane M. Feitosa; Dulce Helena S. Silva ; Pedro Mikael S. Costa; Cláudia Pessoa; Carmem D. L. Campos; Cristina A. Monteiro;
Mariana Helena Chaves ; Gerardo M. Vieira Júnior

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Chemical study and evaluation of the cytotoxicity, antimicrobial and anticholinesterase activities of the paratoid gland secretion from Rhinella granulosa.

https://dx.doi.org/10.21577/0103-5053.20230052

Published online: April 13, 2023

 

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J. Braz. Chem. Soc. 2023, 34(10), 1410-1419

A Simple Method for Determination of Chloroquine Based on Electrogenerated Chemiluminescence

Jeovana C. Pacheco; Jhonathas A. R. Brito; Clenilton C. dos Santos; Cícero W. B. Bezerra; Flavio S. Damos ; Rita C. S. Luz

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Schematic representation of the electrochemiluminescent reaction between chloroquine and the ruthenium complex on the carbon black (CB)-modified screen-printed electrodes (SPE) surface and electrogenerated chemiluminescence (ECL)-potential curves for different concentrations of chloroquine.

https://dx.doi.org/10.21577/0103-5053.20230053

Published online: April 14, 2023

 

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J. Braz. Chem. Soc. 2023, 34(10), 1420-1431

Mitochondria-Targeted Ergosterol Peroxide Derivatives: Synthesis, Anticancer Properties and Their Preliminary Mechanism of Inhibiting MCF-7 Cell Proliferation

Wenkang Ren; Jiale Wu; Jiafeng Wang; Haijun Wang; Yinglong Han; Yu Lin; Ming Bu

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Synthesis and evaluation of anticancer activity of Mito-EP-3b: an apoptosis inducer through mitochondrial apoptotic pathway.

https://dx.doi.org/10.21577/0103-5053.20230054

Published online: April 17, 2023

 

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Total access: 684


J. Braz. Chem. Soc. 2023, 34(10), 1432-1444

Evaluation of Wettability Alteration by Oil Doped with Organic Acid and Low-High Brine Solutions in Sandstone and Carbonate Rocks

Veronica A. Santos ; Taís Felix ; Iara F. Mantovani; Rodrigo Balen; José A. B. da Cunha Neto; Celso P. Fernandes;
Nito A. Debacher

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Wetting process associated with interactions between the rock surface and surrounding fluids in oil recovery.

https://dx.doi.org/10.21577/0103-5053.20230055

Published online: April 17, 2023

 

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Total access: 515


J. Braz. Chem. Soc. 2023, 34(10), 1445-1456

Design and Evaluation of Systemic Administration of Nano Silica MCM48:Eu3+ in Mouse Brain

Leandro A. Azevedo ; Belmira L. S. Andrade-da-Costa; Ricielle L. Augusto; Leonis L. Luz; Ivone A. de Souza; Licarion Pinto ;
Iane B. V. Alves; Severino Alves Júnior

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Mesoporous silica nanoMCM48:Eu3+ administered systemically intravenously to target neural cells in the brain of healthy mice.

https://dx.doi.org/10.21577/0103-5053.20230056

Published online: April 18, 2023

 

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Total access: 684


J. Braz. Chem. Soc. 2023, 34(10), 1457-1463

Wavepress is a User-Friendly Toolkit for Computational Chemistry, Drug Design and Material Science

Mateus A. Gonçalves ; Cleiton A. Nunes; Thelma Sáfadi; Teodorico C. Ramalho

How to cite this article

 

The Wavepress program can be applied in different fields, for example, computational chemistry, drug design and material science.

https://dx.doi.org/10.21577/0103-5053.20230057

Published online: April 24, 2023

 

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Total access: 799


J. Braz. Chem. Soc. 2023, 34(10), 1464-1473

Synthesis and Phytotoxic Evaluation of 3-Indolylglycine Derivatives as New Natural-Like Herbicides

Alexandra A. Amaral; Julia C. M. Willig; Conceição F. A. Olguin; Isadora M. Oliveira; Helio A. Stefani; Giancarlo V. Botteselle;
Flávia Manarin

How to cite this article

 

A series of indolylglycines derivatives were synthesized under an effective, green, and simple approach via multicomponent reaction. Our results indicate that these compounds are a promising potential class of novel synthetic herbicides more phytotoxic than the positive control (atrazine and glyphosate).

https://dx.doi.org/10.21577/0103-5053.20230058

Published online: April 24, 2023

 

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Total access: 830


J. Braz. Chem. Soc. 2023, 34(10), 1474-1485

Synthesis of Fentanyl Triazole Derivatives and their Affinity for Mu-Opioid and Sigma-1 Receptors

Ruth P. Paulino; Rosemeire B. Alves; Joanna Matalińska; Piotr F. J. Lipiński; Rossimiriam P. Freitas

How to cite this article

 

The most active fentanyl triazole derivative was the compound 6d which binds to mu-opioid receptor (MOR) with half-maximal inhibitory concentrations (IC50) = 1.9 μM and to sigma-1 receptor (σ1R) with IC50 = 6.9 μM.

https://dx.doi.org/10.21577/0103-5053.20230059

Published online: April 25, 2023

 

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Total access: 853


J. Braz. Chem. Soc. 2023, 34(10), 1486-1498

Effect of the Temperature and Molar Ratio of Water-Oil on the Enzymatic Hydrolysis Kinetics of the Soybean Oil: Experimental and Mathematical Modeling

Meline G. Porcel ; Júnior Staudt; Gustavo H. Spohr; Camila da Silva ; Carlos E. Borba

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The model proposed in the present study (based on the Ping-Pong Bi Bi mechanism) may support the obtainment of fatty acids with high yield.

https://dx.doi.org/10.21577/0103-5053.20230061

Published online: April 28, 2023

 

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Total access: 676


J. Braz. Chem. Soc. 2023, 34(10), 1499-1508

Formation of α,β-Unsaturated Imines in Apolar Aprotic Solvent: Effect of Hidden Acid Catalysts Analyzed by Theoretical Calculations

Virginia C. Rufino; Josefredo R. Pliego Jr.

How to cite this article

 

Methanesulfonic acid can catalyze the imine formation reaction even in trace amounts.

https://dx.doi.org/10.21577/0103-5053.20230063

Published online: May 2, 2023

 

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Total access: 1122


J. Braz. Chem. Soc. 2023, 34(10), 1509-1519

Preparation of Composite Films of Sodium Alginate-Based Extracted from Seaweeds Macrocystis pyrifera and Lessonia trabeculata Loaded with Aminoethoxyvinylglycine

Nelson Adrián Villacrés ; Eder T. G. Cavalheiro ; Carla C. Schmitt ; Tiago Venâncio ; Hugo A. Alarcón ; Ana C. Valderrama

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In this research, sodium alginate was extracted from brown algae to prepare loaded composite films and study their aminoethoxyvinylglycine kinetic release profiles.

https://dx.doi.org/10.21577/0103-5053.20230064

Published online: May 2, 2023

 

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Total access: 699


J. Braz. Chem. Soc. 2023, 34(10), 1520-1530

Chemical Characterization of Aspartic Protease from Artichoke Flower (Cynara cardunculus L. var scolymus) Using MIR Spectroscopy and Analytical Measurements

Josane C. de Jesus; Lucas C. C. Reis; Mateus P. F. Santos; Leandro S. Santos ; Sibelli P. B. Ferrão

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Use of artichoke flower protease in milk coagulation.

https://dx.doi.org/10.21577/0103-5053.20230065

Published online: May 3, 2023

 

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Total access: 496


J. Braz. Chem. Soc. 2023, 34(10), 1531-1540

Potential Application of Membrane Obtained from Sisal Bagasse in the Removal of Inhibitors from the Fermentation Process

Franklin D. Xavier; Aleir J. O. Silva; Marcos S. Lima; Maria G. da Fonseca; Marta M. da Conceição

How to cite this article

 

The graphical abstract shows the transformation of a lignocellulosic residue in a membrane. The sisal bagasse is dried and pre-treated. The cellulose is recovered, then acetylated and transformed into a membrane by the phase inversion method.

https://dx.doi.org/10.21577/0103-5053.20230066

Published online: May 3, 2023

 

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Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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