JBCS

2:21, Mon Aug 26

Open Access/APCs

vol. 30, No. 8, 2019, p. 1567-1787

 

Discovery of alkaloids derivatives from Worsleya procera root as Plasmodium falciparum inhibitors: isolation, X-ray crystallography, and antiplasmodial investigation. Details are presented in the Article In vitro Antiplasmodial Activities of Alkaloids Isolated from Roots of Worsleya procera (Lem.) Traub (Amaryllidaceae) by Karla L. Gonring-Salarini, Raphael Conti, Jean Paulo de Andrade, Bárbara Juliana P. Borges, Anna Caroline C. Aguiar, Juliana O. de Souza, Camila L. Zanini, Glaucius Oliva, Juan Carlos Tenorio, Javier Ellena, Jaume Bastida, Rafael V. C. Guido and Warley de S. Borges on page 1624.


Cover Article
J. Braz. Chem. Soc. 2019, 30(8), 1624-1633

In vitro Antiplasmodial Activities of Alkaloids Isolated from Roots of Worsleya procera (Lem.) Traub (Amaryllidaceae)

Karla L. Gonring-Salarini; Raphael Conti; Jean Paulo de Andrade; Bárbara Juliana P. Borges; Anna Caroline C. Aguiar; Juliana O. de Souza; Camila L. Zanini; Glaucius Oliva; Juan Carlos Tenorio; Javier Ellena; Jaume Bastida; Rafael V. C. Guido; Warley de S. Borges

How to cite this article

Discovery of alkaloids derivatives from Worsleya procera root as Plasmodium falciparum inhibitors: isolation, X-ray crystallography, and antiplasmodial investigation. Details are presented in the Article In vitro Antiplasmodial Activities of Alkaloids Isolated from Roots of Worsleya procera (Lem.) Traub (Amaryllidaceae) by Karla L. Gonring-Salarini, Raphael Conti, Jean Paulo de Andrade, Bárbara Juliana P. Borges, Anna Caroline C. Aguiar, Juliana O. de Souza, Camila L. Zanini, Glaucius Oliva, Juan Carlos Tenorio, Javier Ellena, Jaume Bastida, Rafael V. C. Guido and Warley de S. Borges on page 1624.

http://dx.doi.org/10.21577/0103-5053.20190061

Published online: April 11, 2019
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Communication J. Braz. Chem. Soc. 2019, 30(8), 1567-1578

Synthesis of the C(7)-C(20) Fragment of Spirotoamides A, B and C

Allan F. C. Rossini; Luiz C. Dias

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In this work, the synthesis of the C(7)-C(20) fragment of spirotoamides A, B and C has been accomplished by a sequence involving 14 steps (0.36% overall yield, average of 81% for each step) in high diastereo- and enantioselectivity, employing, as determining steps, asymmetric Mukaiyama and boron-mediated 1,5-anti promoted aldol reactions between α-methyl-β-hydroxyketones and aldehydes.

http://dx.doi.org/10.21577/0103-5053.20190126

Published online: June 6, 2019
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Articles J. Braz. Chem. Soc. 2019, 30(8), 1579-1586

Evaluation of the Lipid Quality of Lyophilized Pasteurized Human Milk for Six Months by GC-FID and ESI-MS

Luciana P. Manin ; Adriela A. Rydlewski ; Marília B. Galuch ; Jessica S. Pizzo ; Caroline D. Zappielo ; Carlos E. R. Senes; Oscar O. Santos

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The study of the lipid stability of lyophilized human milk is very important for human milk banks. This study presents the values of acidity, fat content, composition of fatty acids and triacylglycerols profile of lyophilized human milk at times 0, 30, 60, 90, 120, 150 and 180 days of storage.

http://dx.doi.org/10.21577/0103-5053.20190045

Published online: March 25, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1587-1598

Droplet Size Distribution in Water-Crude Oil Emulsions by Low-Field NMR

Vinícius G. Morgan; Cristina M. S. Sad; Andre F. Constantino; Rodrigo B. V. Azeredo; Valdemar Lacerda Jr.; Eustáquio V. R. Castro; Lúcio L. Barbosa

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Droplet size distribution measurements by low field nuclear magnetic resonance (NMR) in water/oil (W/O) crude oil emulsions prepared under different shear conditions.

http://dx.doi.org/10.21577/0103-5053.20190057

Published online: April 9, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1599-1607

Synthesis of Highly Ordered Mesoporous MCM-41: Selective External Functionalization by Time Control

Ana Claudia P. da Silva; Patrícia H. Y. Cordeiro; Bianca M. Estevão; Wilker Caetano; Hellmut Eckert; Silvana M. O. Santin; Murilo P. Moisés; Noboru Hioka; André L. Tessaro

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The 3-aminopropyltriethoxysilane (APTES) addition after 90 min of synthesis resulted in a nanoparticle with higher resistance to the extraction process and with more NH2 groups located on the outer surface.

http://dx.doi.org/10.21577/0103-5053.20190058

Published online: April 9, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1608-1615

Production and Characterization of the Bio-Oil Obtained by the Fast Pyrolysis of Spent Coffee Grounds of the Soluble Coffee Industry

Maurício C. Krause; Adriana C. Moitinho; Luiz Fernando R. Ferreira; Ranyere L. de Souza; Laiza C. Krause; Elina B. Caramão

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Spent coffee grounds (SGC) from the industrial production of soluble coffee were extracted in Soxhlet generating an oil rich in linoleic and oleic acid. The solid residue of this extraction was subjected to pyrolysis producing bio oil. The bio-oil was analyzed by gas chromatography coupled to the mass spectrometry (GC-MS) allowing the identification of several compounds important for the chemical industry and for the production of biofuels (phenols, acids, caffeine, indole, hydrocarbons).

http://dx.doi.org/10.21577/0103-5053.20190059

Published online: April 9, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1616-1623

Chemical Composition and Anti-Inflammatory Activity of the Decoction from Leaves of a Cultivated Specimen of Myracrodruon urundeuva

Nayara C. Aquino; Emerson F. Queiroz; Laurence Marcourt; Lyara B. N. Freitas; Emmanuel V. O. Araújo; Luzia K. A. M. Leal; Antonio M. E. Bezerra; Julien Boccard; Jean-Luc Wolfender; Edilberto R. Silveira

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Twenty-four chemical constituents of the decoction from leaves (showing anti-inflammatory activity) of a cultivated specimen of Myracrodruon urundeuva have been isolated and characterized by modern hyphenated chromatography methods (high-speed counter-current chromatography (HSCCC), ultra high-performance liquid chromatography-photodiode array (UHPLC-PDA), and HPLC-PDA-evaporative light scattering detector (ELSD)) and spectroscopy (high-resolution mass spectrometry (HRMS), and 1D and 2D nuclear magnetic resonance (NMR)).

http://dx.doi.org/10.21577/0103-5053.20190060

Published online: April 10, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1624-1633

In vitro Antiplasmodial Activities of Alkaloids Isolated from Roots of Worsleya procera (Lem.) Traub (Amaryllidaceae)

Karla L. Gonring-Salarini; Raphael Conti; Jean Paulo de Andrade; Bárbara Juliana P. Borges; Anna Caroline C. Aguiar; Juliana O. de Souza; Camila L. Zanini; Glaucius Oliva; Juan Carlos Tenorio; Javier Ellena; Jaume Bastida; Rafael V. C. Guido; Warley de S. Borges

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Fifteen alkaloids were identified from roots of Worsleya procera. The alkaloids and extracts were tested in vitro against Plasmodium falciparum.

http://dx.doi.org/10.21577/0103-5053.20190061

Published online: April 11, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1634-1646

Addition of CeO2 Nanorods in PtSn-Based Electrocatalysts for Ethanol Electrochemical Oxidation in Acid Medium

Tuani C. Gentil; Victor S. Pinheiro; Edson C. Paz; Felipe M. Souza; Luanna S. Parreira; Mauro C. Santos

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Synthesis of PtSn-based electrocatalysts with CeO2 nanorods used in the ethanol electrochemical oxidation for power generation.

http://dx.doi.org/10.21577/0103-5053.20190062

Published online: April 15, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1647-1656

Tuning Emitting Color of Electroluminescent Devices Containing Tris(2‑acyl‑1,3‑indandionate)aluminum(III) Complexes as Emitting Layers

Israel F. Costa; Jandeilson L. Moura; Rian E. Aderne; Harold C. Avila; Marco Cremona; Hermi F. Brito; Maria Cláudia F. C. Felinto; Wagner M. Faustino; Ercules E. S. Teotonio

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The photo- and electroluminescence properties of novel 2-acyl-1,3-indandionate complexes were investigated. The electroluminescent devices with configurations glass/ITO/β-NPB/[Al(acind)3]/LiF/Al and glass/ITO/β-NPB/spiro-2CBP/[Al(acind)3]/Al exhibited red and green emission colors, respectively, under applied voltage.

http://dx.doi.org/10.21577/0103-5053.20190064

Published online: April 17, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1657-1666

Pesticide Determination in Water Samples from a Rural Area by Multi-Target Method Applying Liquid Chromatography-Tandem Mass Spectrometry

Mariana B. Almeida; Tiago B. Madeira; Lycio S. Watanabe; Paulo Cesar Meletti; Suzana Lucy Nixdorf

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Liquid chromatography-tandem mass spectrometry (LC-MS/MS) multi-target screening and quantitation indicated alarming pesticide contamination in all waters sources analyzed from a rural area.

http://dx.doi.org/10.21577/0103-5053.20190066

Published online: April 18, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1667-1677

Palladium Nanoparticles Supported on β-Cyclodextrin Functionalized Poly(amidoamine)s and Their Application in Suzuki-Miyaura Cross-Coupling Reactions

Wei Zhang ; Zi-Jian Yao; Wei Deng

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Presented here is the synthesis, characterization and catalytic properties of an organic-inorganic hybrid material, Pd@PAAs-CD. This hybrid material was used to catalyze Suzuki-Miyaura cross-coupling reactions between substituted aryl halides and phenyl boronic acid in high yields. The high reaction efficiency makes this new catalyst system a useful alternative to other recently-developed methods for the preparation of substituted arenes. In addition, it is also demonstrated that Pd@PAAs-CD can be recycled and reused in further cross-coupling reactions.

http://dx.doi.org/10.21577/0103-5053.20190067

Published online: April 23, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1678-1687

New Strategies in Enantioselective Hydrogenation on Supported Transition Metal Catalyst: Effects of Metal Sintering and Support Swelling

Nicolás R. Carrara ; Juan M. Badano; Gustavo Mendow; Doris Ruiz; Carlos R. Vera; Mónica E. Quiroga

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A novel method for sintering Pt metal particles by nitrile reduction was used, observing a controlled migration of the metal particles to the surface layers. The optimal particle size that maximized the enantiomeric excess (eeR) was obtained at 24 h sintering.

http://dx.doi.org/10.21577/0103-5053.20190069

Published online: April 23, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1688-1696

The Effects of pH Values on Functional Mechanisms of Nitrite Anions for Q235 Carbon Steels in
0.01 mol L-1 NaNO2-HCl Solutions

Yong Zhou ; Pei Zhang; Huiju Huang; Jinping Xiong; Fuan Yan

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The occurrence of uniform corrosion (UC), intergranular corrosion (IGC) and pitting corrosion (PC) was observed on the surface of Q235 carbon steels in 0.01 mol L-1 NaNO2-HCl solutions with pH 1 and 2, pH 3 and 4, and pH 5 and 6, respectively.

http://dx.doi.org/10.21577/0103-5053.20190070

Published online: April 24, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1697-1706

Inhibition of Zika Virus Replication by Synthetic Bis-Naphthoquinones

Daniel T. G. Gonzaga; Rafaela S. P. Gomes; Roberta K. F. Marra; Fernando C. da Silva ; Max W. L. Gomes; Davis F. Ferreira; Raissa M. A. Santos; Ana M. V. Pinto; Norman Arthur Ratcliffe; Claudio C. Cirne-Santos; Caroline S. Barros; Vitor F. Ferreira; Izabel Christina N. P. Paixão

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This study screening bis-naphthoquinones series against Zika virus. The findings showed that among the compounds analyzed four were promising.

http://dx.doi.org/10.21577/0103-5053.20190071

Published online: April 25, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1707-1716

The Influence of Different Ammonium Cations on the Optical Properties of Tetrakis GdIII and EuIII Complexes

Renata D. Adati ; Jorge H. S. K. Monteiro; Lucas P. Cardoso; Daniel H. de Oliveira; Miguel Jafelicci Jr.; Marian R. Davolos

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The counterion-tetrakis GdIII and EuIII complexes interaction evaluated by spectroscopic data/theoretical methods will provide guidance for development of displays.

http://dx.doi.org/10.21577/0103-5053.20190073

Published online: April 26, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1717-1727

Alternative Non-Ionic Pathway for Uncatalyzed Prins Cyclization: DFT Approach

Rodolfo G. Fiorot ; Gottimukkala Rambabu; Vijayaparthasarathi Vijayakumar; Yarragudi B. Kiran ; José W. M. Carneiro

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Identifying alternative and more favorable non-ionic pathway for uncatalyzed Prins cyclization by means of density functional theory (DFT) calculations.

http://dx.doi.org/10.21577/0103-5053.20190075

Published online: April 29, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1728-1740

Chemical Constituents, Antiproliferative and Antioxidant Activities of Vernonanthura nudiflora (Less.) H. Rob. Aerial Parts

Anderson V. G. Ramos; Juliana L. B. Peixoto; Márcia R. P. Cabral; Ana Maria Amrein; Tatiana S. Tiuman; Solange M. Cottica; Ilza M. O. Souza; Ana Lucia T. G. Ruiz; Mary Ann Foglio ; Marta R. B. Carmo; Maria Helena Sarragiotto; Debora C. Baldoqui

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Piptocarphins A, B, D and a new sesquiterpene lactone, 8α-tigloyloxy-10α-hydroxy-hirsutinolide, along with triterpenes, flavonoids and chlorogenic acid derivative were isolated from Vernonanthura nudiflora. The isolated sesquiterpene lactones showed in vitro antiproliferative activity against human cancer cell lines.

http://dx.doi.org/10.21577/0103-5053.20190076

Published online: April 30, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1741-1750

Chitosan Imparts Better Biological Properties for Poly(ε-caprolactone) Electrospun Membranes than Dexamethasone

Bruno R. Machado; Sharise B. Roberto ; Elton G. Bonafé; Samira E. A. Camargo; Carlos H. R. Camargo; Ketul C. Popat; Matt J. Kipper; Alessandro F. Martins

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Chitosan imparts better biological responses for poly(ε-caprolactone) electrospun membrane than dexamethasone.

http://dx.doi.org/10.21577/0103-5053.20190077

Published online: April 30, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1751-1761

Influence of Fatty Acid Methyl Ester Composition, Acid Value, and Water Content on Metallic Copper Corrosion Caused by Biodiesel

José G. Rocha Jr. ; Marcelle D. R. dos Santos; Fernanda B. Madeira; Sheisi F. L. S. Rocha; Glauco F. Bauerfeldt; Willian L. G. da Silva; Acácia A. Salomão; Matthieu Tubino

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Molecular oxygen dissolved in aqueous and biodiesel phases oxidizes the unsaturated fatty methyl esters that, with the aid of passivating agents, protect copper against corrosion. Free acids dissolve the passivating agents, increasing the corrosion rate.

http://dx.doi.org/10.21577/0103-5053.20190078

Published online: April 30, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1762-1768

Electrochemical Impedance Biosensor for the Determination of Lipopolysaccharide Using Peptide as the Recognition Molecule

Xuemei Fan ; Zhejian Li ; Shumin Wang; Lei Liu; Ping Liu; Fengying Chen; Xingwang Zheng

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A highly sensitive electrochemical impedance biosensor for the determination of lipopolysaccharide was designed using peptide as the recognition molecule.

http://dx.doi.org/10.21577/0103-5053.20190081

Published online: May 7, 2019
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J. Braz. Chem. Soc. 2019, 30(8), 1769-1778

Removal of Orange G Dye by Manganese Oxide Nanostructures

Raquel P. D. Victor ; Luiza L. M. Fontes; Antônio A. Neves ; Maria E. L. R. de Queiroz ; André F. de Oliveira; Liany D. L. Miranda

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Small doses of brown birnessite or pyrolusite were sufficient to remove about 90-99% of the dye.

http://dx.doi.org/10.21577/0103-5053.20190083

Published online: May 7, 2019
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Short Report J. Braz. Chem. Soc. 2019, 30(8), 1779-1787

Oxone®-Mediated Direct α-Hydroxylation of β-Dicarbonyl Compounds: Racemic Synthesis of Harzialactone A

Marcus M. Sá; Marcos M. Peterle ; Marcelo V. Marques

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An environmentally benign method was developed for the α-hydroxylation of malonates and γ-lactones and the synthesis of harzialactone A was achieved.

http://dx.doi.org/10.21577/0103-5053.20190082

Published online: May 7, 2019
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Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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