JBCS

17:58, Fri Sep 22

Open Access/APCs

Current Issue vol. 28, No. 11, 2017, p. 2045-2279

 

Enantiomeric series of methylated and/or chorinated bis(7)-tacrine analogues were found to be potent inhibitors of AChE and BuChE with IC50 in the nanomolar concentration scale. The R,R-3b (with Cl) inhibitor is the most active homodimer against AChE and is also selective, showing no activity against BuChE. Binding mode and affinity predictions showed the importance of pi-stacking and halogen bond interactions in peripheral anionic site (PAS). Details are presented in the Article Chiral Bistacrine Analogs: Synthesis, Cholinesterase Inhibitory Activity and a Molecular Modeling Approach by João P. B. Lopes, Jessie S. da Costa, Marco A. Ceschi, Carlos A. S. Gonçalves, Eduardo L. Konrath, Ana L. M. Karl, Isabella A. Guedes and Laurent E. Dardenne on page 2218.


Cover Article
J. Braz. Chem. Soc. 2017, 28(11), 2218-2228

Chiral Bistacrine Analogues: Synthesis, Cholinesterase Inhibitory Activity and a Molecular Modeling Approach

João P. B. Lopes; Jessie S. da Costa; Marco A. Ceschi; Carlos A. S. Gonçalves; Eduardo L. Konrath; Ana L. M. Karl; Isabella A. Guedes; Laurent E. Dardenne

How to cite this article

Enantiomeric series of methylated and/or chorinated bis(7)-tacrine analogues were found to be potent inhibitors of AChE and BuChE with IC50 in the nanomolar concentration scale. The R,R-3b (with Cl) inhibitor is the most active homodimer against AChE and is also selective, showing no activity against BuChE. Binding mode and affinity predictions showed the importance of pi-stacking and halogen bond interactions in peripheral anionic site (PAS). Details are presented in the Article Chiral Bistacrine Analogs: Synthesis, Cholinesterase Inhibitory Activity and a Molecular Modeling Approach by João P. B. Lopes, Jessie S. da Costa, Marco A. Ceschi, Carlos A. S. Gonçalves, Eduardo L. Konrath, Ana L. M. Karl, Isabella A. Guedes and Laurent E. Dardenne on page 2218.

http://dx.doi.org/10.21577/0103-5053.20170074

Published online: April 25, 2017

Articles J. Braz. Chem. Soc. 2017, 28(11), 2045-2053

DLLME-GC/ECD Method for the Residual Analysis of Parathion-Methyl and its Application in the Study of the UV-Photodegradation Process

Gustavo G. Pimenta; Maria E. L. R. de Queiroz; Raquel P. D. Victor; Luiz M. Noronha; Antônio A. Neves; André F. de Oliveira; Fernanda F. Heleno

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A DLLME-GC/ECD was optimized and validated to analyze the parathion-methyl in water and evaluate its UV-photodegradation.

http://dx.doi.org/10.21577/0103-5053.20170048

Published online: March 14, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2054-2063

Synthesis, Anti-Diabetic and Renoprotective Activity of Some New Benzazole, Thiazolidin-4-one and Azetidin-2-one Derivatives

Ahmed Abdou O. Abeed; Mohamed Salah K. Youssef; Rehab Hegazy

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A new series of heterocycles were synthesized. Some of these compounds were evaluated for their anti-hyperglycemic and renoprotective activity.

http://dx.doi.org/10.21577/0103-5053.20170050

Published online: March 14, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2064-2072

Cellulose Oxidation and the Use of Carboxyl Cellulose Metal Complexes in Heterogeneous Catalytic Systems to Promote Suzuki-Miyaura Coupling and C−O Bond Formation Reaction

Guilherme B. C. Martins; Marcelo R. dos Santos; Marcus V. R. Rodrigues; Renata R. Sucupira; Luisa Meneghetti; Adriano L. Monteiro; Paulo A. Z. Suarez

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Application of metal-modified cellulose as ligand in heterogeneous catalytic systems of coupling reactions as a new option for green and sustainable chemistry.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170051

Published online: March 14, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2073-2083

Structural Invariance of a ZnII Coordination Polymer with 5-Aminoisophthalic Acid under Different Synthetic Conditions

Iara M. L. Rosa; Ana C. Z. dos Santos; Luana A. R. Giusto; Carlos B. Pinheiro; Antonio C. Doriguetto

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Synthesis of coordination polymer [Zn(aip)(DMSO)] (aip: 5-aminoisophthalate and DMSO: dimethylsulfoxide) using several synthetic conditions, which show the high stability and structural invariance of the network.

http://dx.doi.org/10.21577/0103-5053.20170052

Published online: March 21, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2084-2093

Antifungal Properties of High Efficient W/WO3 Electrodes Acting under UV-Vis and Visible Light and Chloride Medium

Barbara C. A. Souza; Thais T. Guaraldo; Michelle F. Brugnera; Regina H. Pires; Maria J. S. M. Giannini; Maria V. B. Zanoni

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Fast inactivation of C. parapsilosis by photoelectrocatalysis. The attack of HO∙ radicals to the cell wall of the fungus promotes rapid death and high degradation of organic compounds from the cell lyse. Photoelectrocatalysis is an efficient alternative to threat wastewater with high chloride content containing fungus.

http://dx.doi.org/10.21577/0103-5053.20170053

Published online: March 21, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2094-2099

An Environmental Friendly Flow-Injection Procedure for On Line Extraction and Spectrophotometric Determination of Gossypol in Cottonseed Meal

Bianca Daminato; Marcos Y. Kamogawa; Wanessa R. Melchert

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A fast, simple, inexpensive and green flow analysis procedure for the determination of gossypol in cottonseed meal.

http://dx.doi.org/10.21577/0103-5053.20170054

Published online: March 24, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2100-2105

Lipophilicity Study of 1-(Benzofuran-2-yl)ethan-1-one Oxime and its Substituted O-Benzyl Ethers

Tomasz Kosmalski; Renata Studzińska; Małgorzata Redka; Robert Pluskota; Bożena Modzelewska-Banachiewicz

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Lipophilicity parameters for 1-(benzofuran-2-yl)ethan-1-one oxime and its nine biological active ethers were evaluated using reversed phase high performance liquid chromatography (RP-HPLC) method. The log kw lipophilicity parameters were compared with computed log P values using methanol, 2-propanol and acetonitrile as organic modifier of the mobile phases.

http://dx.doi.org/10.21577/0103-5053.20170055

Published online: March 24, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2106-2116

Strategies for the Efficient Synthesis of Biheterocyclic 5-[2-(Trifluoromethylheteroaryl)-ethyl]-1,3,4-oxadiazoles from Levulinic Acid

Juliana L. Malavolta; Leandro M. Frigo; Sidnei Moura; Darlene C. Flores; Alex F. C. Flores

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New ethylene-spaced biheterocyclic 5-[2-(trifluoromethyl heteroaryl)-ethyl]-1,3,4-oxadiazoles were synthesized by two consecutive cyclocondensations from methyl 7,7,7-trifluoro-4-methoxy-6-oxo-4-heptenote derived from the renewable levulinic acid.

http://dx.doi.org/10.21577/0103-5053.20170056

Published online: March 24, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2117-2129

A Potential Visible-Light NO Releaser: Synthesis, Reactivity and Vasodilator Properties

Aurideia P. de Sousa; André F. Fernandes; Iury A. Paz; Nilberto R. F. Nascimento; Javier Ellena; Eduardo H. S. Sousa; Luiz G. F. Lopes; Alda K. M. Holanda

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A new ruthenium nitrosyl complex containing benzoylpyridine ligand showed promising visible light induced release of NO and vasodilation activity.

http://dx.doi.org/10.21577/0103-5053.20170057

Published online: March 27, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2130-2135

Conformational Analysis, Experimental and GIAO-DFT 13C NMR Chemical Shift Calculation on 2'-Hydroxy-3,4,5-trimethoxy-chalcone

Fabio Luiz P. Costa; Paulo F. Gomes; Andressa K. Silva; Luciano M. Lião

How to cite this article

 

Experimental and computational data: a robust protocol to complete 13C NMR chemical shifts assignment of substituted chalcones.

http://dx.doi.org/10.21577/0103-5053.20170060

Published online: March 31, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2136-2145

Allergenic Fragrances Analysis in Brazilian Perfumes by Headspace Solid Phase Microextraction and Gas Chromatography-Mass Detector (HS-SPME-GC-MS)

Clêrton L. Gomes; Ari C. A. de Lima; Pablo G. A. Barbosa; Rouse S. Costa; Diego Q. Melo; Ronaldo F. Nascimento

How to cite this article

 

The image depicts the first step of sample preparation process starting from the extraction of volatile perfume by solid phase microextraction (SPME) in headspace mode with subsequent identification and quantification by gas chromatography mass spectrometry (GC-MS).

http://dx.doi.org/10.21577/0103-5053.20170062

Published online: March 31, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2146-2154

Illicit Drugs, Metabolites and Adulterants in Wastewater: Monitoring Community Drug Abuse in the Brazilian Federal District during the 2014 Soccer World Cup

Fernando F. Sodré; Gustavo B. Souza; Rafael S. Feitosa; Carlos Eduardo B. Pereira; Adriano O. Maldaner

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Wastewater analyses indicate high cocaine consumption during Soccer World Cup as well as different forms of used cocaine.

http://dx.doi.org/10.21577/0103-5053.20170063

Published online: April 3, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2155-2162

Synthesis and Evaluation of Cytotoxic Effects of Amino-ester Derivatives of Natural α,β-Amyrin Mixture

Mauricio M. Victor; Jorge M. David; Marcelo A. S. dos Santos; André L. B. S. Barreiros; Marizeth L. Barreiros; Fernanda S. Andrade; Adriana A. Carvalho; Maria Claudia S. Luciano; Manoel O. de Moraes; Francisco W. A. Barros-Nepomuceno; Claudia Pessoa

How to cite this article

 

Natural α,β-amyrin mixtures isolated from Esenbeckia grandiflora were transformed into aminoesters and their cytotoxic activities were evaluated against PC-3, HCT-116 and HL-60 tumor cells. Diethyl, aniline, morpholine and imidazole derivatives showed moderate activity against HL60.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170064

Published online: April 6, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2163-2171

In vitro Monitoring of Macro and Microelements in Multimineral Preparations across Dissolution Profiles by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES)

Aníbal de F. Santos Júnior; Ramon R. Sá; Laiana O. B. Silva; Hemerson I. F. Magalhães; Taiana B. Tarantino; Maria Graças A. Korn

How to cite this article

 

The metal content across dissolution profiles of five multivitamin supplements was evaluated by inductively coupled plasma optical emission spectrometry (ICP OES).

http://dx.doi.org/10.21577/0103-5053.20170065

Published online: April 7, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2172-2179

Pre-Concentration and Separation of Perphenazine Using Picric Acid Loaded α-Fe2O3 Nanoparticles: HPLC Syringe Filter as the Particles Support

Zahra Ramezani; Marzieh Shekarriz; Abdol Azim Behfar; Somayeh Kiamarzi

How to cite this article

 

Picric acid loaded iron oxide nanoparticles were retained on HPLC (high-performance liquid chromatography) syringe disk and used as SPE (solid phase extraction) sorbent for perphenazine pre-concentration and clean up.

http://dx.doi.org/10.21577/0103-5053.20170066

Published online: April 7, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2180-2191

The Influence of Methoxy and Ethoxy Groups on Supramolecular Arrangement of Two Methoxy-chalcones

Jean M. F. Custodio; Eduardo C. M. Faria; Lóide O. Sallum; Vitor S. Duarte; Wesley F. Vaz; Gilberto L. B. de Aquino; Paulo S. Carvalho Jr.; Hamilton B. Napolitano

How to cite this article

 

What is the influence of substituents on methoxy-chalcones? A combined structural and theoretical investigation.

http://dx.doi.org/10.21577/0103-5053.20170067

Published online: April 10, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2192-2201

Synergistic Effect of Adsorption and Enzymatic Conversion in the Bisphenol-A Removal by Laccase Immobilized on Poly(glycidyl methacrylate-co-ethyleneglycol dimethacrylate)

Claudinei F. Melo; Leandro A. Silva; Luciana C. Costa; Monica R. C. Marques

How to cite this article

 

Synthesis of the resin after diazotization and the mechanisms of removal of bisphenol-A by adsorption and enzymatic oxidation.

http://dx.doi.org/10.21577/0103-5053.20170070

Published online: April 13, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2202-2210

Investigation on Prospective Energy Power from Corncob Husk Biomass and its Biochars by Kinetic Parameters and Isoconversional Models

Carolina C. Bueno; Amanda A. D. Maia; Leandro C. de Morais; André H. Rosa

How to cite this article

 

Corncob husk biomass requires low input of energy on pyrolysis to be produced and it is an indicator for worthy carbon based biofuels. Some biochars are prone to oxidation reactions.

http://dx.doi.org/10.21577/0103-5053.20170071

Published online: April 17, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2211-2217

Rice Husk Ash as Raw Material for the Synthesis of Silicon and Potassium Slow‑Release Fertilizer

Amanda A. França; Juliana Schultz; Roger Borges; Fernando Wypych; Antonio S. Mangrich

How to cite this article

 

Rice husk ash was used to synthesize a silicon and potassium slow-release fertilizer. The method is an attractive way of enabling the reuse of a waste.

http://dx.doi.org/10.21577/0103-5053.20170072

Published online: April 18, 2017

J. Braz. Chem. Soc. 2017, 28(11), 2218-2228

Chiral Bistacrine Analogues: Synthesis, Cholinesterase Inhibitory Activity and a Molecular Modeling Approach

João P. B. Lopes; Jessie S. da Costa; Marco A. Ceschi; Carlos A. S. Gonçalves; Eduardo L. Konrath; Ana L. M. Karl; Isabella A. Guedes; Laurent E. Dardenne

How to cite this article

 

Chiral bis(7)-tacrine compounds were synthesized in yields ranging from 40 to 80%. Both enantiomeric series were found to be potent AChE and BuChE inhibitors in vitro, with IC50 values ranging from 2 to 16 nM and from 30 to 140 nM, respectively.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170074

Published online: April 25, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2229-2243

Synthesis, Characterization and in vitro Anticancer Activity of Novel 8,4'-Oxyneolignan Analogues

Gisele C. Souza; Gilberto C. Franchi Jr.; Alexandre E. Nowill; Lourivaldo S. Santos; Cláudio N. Alves; Lauro E. S. Barata; Carlos K. Z. Andrade

How to cite this article

 

A new subclass of 8,4'-oxyneolignans presented a promising antiproliferative activity against human cancer cells.

http://dx.doi.org/10.21577/0103-5053.20170075

Published online: April 26, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2244-2253

Synthetic Niobium Oxyhydroxide as a Bifunctional Catalyst for Production of Ethers and Allyl Alcohol from Waste Glycerol

Henrique S. Oliveira; Jarbas M. Resende; Patterson P. Souza; Patricia S. O. Patrício; Luiz C. A. Oliveira

How to cite this article

 

Glycerol products in volatile fraction and condensed fraction using niobium oxyhydroxide as catalyst.

http://dx.doi.org/10.21577/0103-5053.20170076

Published online: April 27, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2254-2266

Synthesis and Characterization of LiCoO2 from Different Precursors by Sol‑Gel Method

Bruno G. A. Freitas; José M. Siqueira Jr.; Leonardo M. da Costa; Glaucio B. Ferreira; Jackson A. L. C. Resende

How to cite this article

 

HT-LiCoO2 synthesized by sol-gel method with the citric acid, starch, glycine and gelatin complexing agents to obtain the rhombohedral crystalline system of the R m space group.

http://dx.doi.org/10.21577/0103-5053.20170077

Published online: April 27, 2017


J. Braz. Chem. Soc. 2017, 28(11), 2267-2274

Rate Coefficient for the Reaction of Cl Atoms with cis-3-Hexene at 296 ± 2 K

Thaís S. Barbosa; Javier A. Barrera; Rafael Jara Toro; Glauco F. Bauerfeldt; Graciela Arbilla; Silvia I. Lane

How to cite this article

 

The rate coefficient of the cis-3-hexene + Cl atoms reaction was determined by the relative rate technique using trichloroacetyl chloride to produce chlorine atoms.

http://dx.doi.org/10.21577/0103-5053.20170078

Published online: May 3, 2017

Short Report J. Braz. Chem. Soc. 2017, 28(11), 2275-2279

Phenylethylpyranone and Aristolochic Acid Derivatives from Aristolochia urupaensis

Juliana C. Holzbach; Isabele R. Nascimento; Lucia M. X. Lopes

How to cite this article

 

A new pyranone and three new aristolochic acid derivatives were isolated from Aristolochia urupaensis stems together with 31 known compounds.

http://dx.doi.org/10.21577/0103-5053.20170059

Published online: March 27, 2017

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
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