JBCS

20:43, Fri Apr 28

Open Access/APCs

Current Issue vol. 28, No. 6, 2017, p. 927-1144

 

This review deals with the chemistry of the sesquiterpenoid alkaloids, a relatively small group of natural products but with outstanding properties, structures and relevance. We couple this text with our respects for the premature disappearance of Angelo da Cunha Pinto, our colleague who came perhaps from Tras dos Montes, and loved to make much fun of all of us while teaching us how to be very involved in all aspects of organic chemistry. First, he dedicated himself to natural products chemistry, and later came round to appreciating their synthesis. Details are presented in the Review The Chemistry of the Sesquiterpene Alkaloids by Timothy J. Brocksom, Kleber T. de Oliveira and André L. Desiderá on page 933.


Cover Article
J. Braz. Chem. Soc. 2017, 28(6), 933-942

The Chemistry of the Sesquiterpene Alkaloids

Timothy J. Brocksom; Kleber T. de Oliveira; André L. Desiderá

How to cite this article

This review deals with the chemistry of the sesquiterpenoid alkaloids, a relatively small group of natural products but with outstanding properties, structures and relevance. We couple this text with our respects for the premature disappearance of Angelo da Cunha Pinto, our colleague who came perhaps from Tras dos Montes, and loved to make much fun of all of us while teaching us how to be very involved in all aspects of organic chemistry. First, he dedicated himself to natural products chemistry, and later came round to appreciating their synthesis. Details are presented in the Review The Chemistry of the Sesquiterpene Alkaloids by Timothy J. Brocksom, Kleber T. de Oliveira and André L. Desiderá on page 933.

http://dx.doi.org/10.21577/0103-5053.20170049

Published online: March 14, 2017

Review J. Braz. Chem. Soc. 2017, 28(6), 927-932

Silver and Silver Chloride Nanoparticles and their Anti-Tick Activity: a Mini Review

Nelson Durán; Marcela Durán; Celso E. de Souza

How to cite this article

 

Silver nanoparticles can act against ticks or against major pathogens transmitted by the bite of ticks such as bacteria, viruses or protozoa with equal or better efficacy of antibiotics, antiviral or antiparasitic agents.

http://dx.doi.org/10.21577/0103-5053.20170045

Published online: March 9, 2017

J. Braz. Chem. Soc. 2017, 28(6), 933-942

The Chemistry of the Sesquiterpene Alkaloids

Timothy J. Brocksom; Kleber T. de Oliveira; André L. Desiderá

How to cite this article

 

This review presents the structures, biological activities, biosynthesis, and syntheses of the sesquiterpene alkaloids, principally the dendrobine and guaipyridine groups.

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

http://dx.doi.org/10.21577/0103-5053.20170049

Published online: March 14, 2017

Articles J. Braz. Chem. Soc. 2017, 28(6), 943-949

Calcium Phosphate Coatings by Sol-Gel on Acrylonitrile-butadiene-styrene Substrate

Lucimara C. Bandeira; Beatriz M. de Campos; Katia J. Ciuffi; Eduardo J. Nassar; Jorge V. L. Silva; Marcelo F. Oliveira; Izaque A. Maia

How to cite this article

 

The sol-gel methodology affords materials with useful properties for application in biological medium. Additive manufacture is an effective technology to produce complex macrostructures. In combination, sol-gel and additive manufacture produce materials with new properties for various applications.

http://dx.doi.org/10.21577/0103-5053.20160244

Published online: August 24, 2016

J. Braz. Chem. Soc. 2017, 28(6), 950-959

A Simple and Fast Method for Magnetic Solid Phase Extraction of Ochratoxin A

Azam Sargazi; Amin Aliabadi; Ali Rahdari; Samin Allahdini-Hesaroiyeh; Massoud Nejati-Yazdinejad; Mostafa Heidari Majd

How to cite this article

 

Dopamine loaded MNPs were used as an electrostatic sorbent in magnetic solid phase extraction for separation of ochratoxin A.

http://dx.doi.org/10.21577/0103-5053.20160245

Published online: August 30, 2016

J. Braz. Chem. Soc. 2017, 28(6), 960-966

Laccase-Assisted Rapid Synthesis of Colloidal Gold Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

Fang Li; Zheng Li; Chang Zeng; Yonggang Hu

How to cite this article

 

Gold nanoparticles were rapidly synthesized by using laccase in alkaline medium at ambient conditions, and exhibited high catalytic stability for the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.

http://dx.doi.org/10.21577/0103-5053.20160246

Published online: August 30, 2016

J. Braz. Chem. Soc. 2017, 28(6), 967-974

In Tube Ultrasonic and Air Assisted Liquid-Liquid Microextraction-Gas Chromatography-Mass Spectrometry Determination: a Novel Method for the Determination of Phthalate Esters in Aqueous Samples

Abolfazl Farahani; Majid Ramezani; Jalal Hassan; Ali Niazi

How to cite this article

 

In tube ultrasonic and air assisted liquid-liquid microextraction IT-UAA-LLME) method, was developed for the preconcentration of some phthalate esters, prior to their determination using gas chromatography mass spectrometry.

http://dx.doi.org/10.21577/0103-5053.20160247

Published online: August 31, 2016

J. Braz. Chem. Soc. 2017, 28(6), 975-984

Synthesis, Three-Dimensional Structure, Conformation and Correct Chemical Shift Assignment Determination of Pharmaceutical Molecules by NMR and Molecular Modeling

Sirlene O. F. de Azeredo; Edijane M. Sales; José D. Figueroa-Villar

How to cite this article

 

Synthesis and application of NMR and molecular modeling to confirm the complete structure and the non questionable chemical shift assignment of these products.

http://dx.doi.org/10.21577/0103-5053.20160248

Published online: August 31, 2016


J. Braz. Chem. Soc. 2017, 28(6), 985-994

Isopropyl Octanoate Synthesis Catalyzed by Layered Zinc n-Octanoate

Swami A. Maruyama; Luis Ricardo S. Kanda; Fernando Wypych

How to cite this article

 

Reusable layered zinc n-octanoate was employed as catalyst in the esterification of octanoic acid with isopropanol, providing high acid to ester conversions.

http://dx.doi.org/10.21577/0103-5053.20160251

Published online: September 5, 2016


J. Braz. Chem. Soc. 2017, 28(6), 995-1002

Direct Incorporation of Ginger and Oregano Antioxidants in Canola Oil

Andressa H. A. Grabsk; Alexandre S. Avincola; Thiago Claus; Carla Porto; Jesuí V. Visentainer; Eduardo J. Pilau

How to cite this article

 

This is an efficient method of direct extraction/incorporation of antioxidants from oregano and ginger in canola oil using a green extraction process, which is safe for health and contributes to environmental sustainability.

http://dx.doi.org/10.21577/0103-5053.20160252

Published online: September 9, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1003-1013

Larvicidal Activity of Beauveria bassiana Extracts against Aedes aegypti and Identification of Beauvericins

Juliana F. S. Daniel; Andressa A. Silva; Danielle H. Nakagawa; Lívia S. de Medeiros; Mário G. Carvalho; Lucineli J. Tavares; Lucas M. Abreu; Edson Rodrigues-Filho

How to cite this article

 

The cyclodepsipeptides beauvericins and bassianolide were identified from the Beauveria bassiana extracts. These extracts showed larvicidal activity on 3rd instar of Aedes aegypti.

http://dx.doi.org/10.21577/0103-5053.20160253

Published online: September 9, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1014-1022

Miscellaneous Diterpenes from the Aerial Parts of Plectranthus ornatus Codd

Fábio N. Ávila; Francisco C. L. Pinto; Thiciana S. Sousa; Maria Conceiçăo M. Torres; Leticia V. Costa-Lotufo; Danilo D. Rocha; Mayron A. de Vasconcelos; Nairley Cardoso-Sá; Edson H. Teixeira; Maria Rose Jane R. Albuquerque; Edilberto R. Silveira; Otília D. L. Pessoa

How to cite this article

 

Nine diterpenes, including five unknown diterpenes derivatives, were isolated from the aerial parts of cultivated specimens of Plectranthus ornatus. All compounds were assayed against the four human cancer cell lines, and Gram-positive and Gram-negative bacteria strains.

http://dx.doi.org/10.21577/0103-5053.20160255

Published online: September 14, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1023-1029

First Asymmetric Reduction of Isatin by Marine-Derived Fungi

Willian G. Birolli; Irlon M. Ferrreira; David E. Q. Jimenez; Bianca N. M. Silva; Bárbara V. Silva; Angelo C. Pinto; André L. M. Porto

How to cite this article

 

A screening was carried out and several strains of marine-derived fungi were able to reduce isatin and produced the enantioenriched dioxindole, up to 66% ee and with different conversions (11-98%).

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

http://dx.doi.org/10.21577/0103-5053.20160256

Published online: September 14, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1030-1037

Development of a Dissolution Test for Fenbendazole-Praziquantel Capsules Using UV-PLS Method

Silvana E. Vignaduzzo; María A. Operto; Patricia M. Castellano

How to cite this article

 

The aim was to develop a dissolution test for fenbendazole-praziquantel capsules and an UV-PLS method for its evaluation.

http://dx.doi.org/10.21577/0103-5053.20160258

Published online: September 19, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1038-1047

Preparative Separation and Structural Identification of Impurities of a New α2‑Adrenoceptor Agonist Using Stacking Injection, LC-MSn and LC-SPE-NMR

Josiane O. Cardoso; Sérgio S. Thomasi; Tiago Venâncio; Ivan R. Pitta; Maria do Carmo A. de Lima; Regina V. Oliveira

How to cite this article

 

A semi-preparative chromatography application and stacking injection for purification of drugs with high efficiency and lower consumption of solvents associated with liquid chromatography-multistage mass spectrometry (LC-MSn) and liquid chromatography-solid phase extraction-nuclear magnetic resonance (LC-SPE-NMR) techniques for structural characterization of impurities.

http://dx.doi.org/10.21577/0103-5053.20160259

Published online: September 20, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1048-1062

Study of Reactions of Two Mannich Bases Derived of 4'-Hydroxychalcones with Glutathione by RP‑TLC, RP‑HPLC and RP‑HPLC‑ESI‑MS Analysis

Aline Bernardes; Caridad N. Pérez; Mátyás Mayer; Cameron C. da Silva; Felipe T. Martins; Pál Perjési

How to cite this article

 

Study on formation of GSH conjugation reaction of Mannich bases of 4'-hydroxylchalcones by RP-TLC, RP-HPLC and RP-HPLC-MS methods.

http://dx.doi.org/10.21577/0103-5053.20160260

Published online: September 20, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1063-1073

Synthesis, Characterization and Dielectric Properties of New 5-(4-Hydroxyphenyl)-10,15,20-tri-4-[2-(3-pentadecylphenoxy)ethoxy]phenyl porphyrin and Their Ni, Co and Cu Complexes

Joăo P. F. Mota; Antônio E. da Costa Júnior; Viviane G. P. Ribeiro; Samuel G. Sampaio; Nayane M. A. Lima; Fernando L. F. da Silva; Claudenilson S. Clemente; Giuseppe Mele; Diego Lomonaco; Selma E. Mazzetto

How to cite this article

 

Synthesis of a novel asymmetric porphyrin based on cardanol.

http://dx.doi.org/10.21577/0103-5053.20160261

Published online: September 26, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1074-1080

Development and Characterization of Synthetic Chalcones-Loaded Eudragit RS 100 Microparticles for Oral Delivery

Cristian R. Kleemann; Talitha C. dos Santos; Luciana C. Tavares; Moacir G. Pizzolatti; Angela M. de Campos

How to cite this article

 

The study presents the development of a drug delivery system and validation of a simple and rapid high performance liquid chromatography method for the characterization of two chalcones in Eudragit® RS100-based microparticles

http://dx.doi.org/10.21577/0103-5053.20160263

Published online: September 26, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1081-1090

Strategy for Correction of Matrix Effect on the Determination of Pesticides in Water Bodies Using SPME-GC-FID

Vitor P. A. Silva; Mário S. O. Paz; Rivelino M. Cavalcante; Ronaldo F. Nascimento

How to cite this article

 

Determination of pesticides in river water, estuarine, seawater and weir water using standard surrogate and relation factor by solid phase microextraction gas chromatography with flame ionization detector (SPME-GC-FID).

http://dx.doi.org/10.21577/0103-5053.20160264

Published online: September 27, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1091-1097

Electrooxidation of Mixed Ethanol and Methanol Solutions on PtSn/C Electrocatalysts Prepared by the Polymeric Precursor Method

Aline Amorim; Luanna S. Parreira; Júlio César M. Silva; Mauro C. dos Santos

How to cite this article

 

PtSn/C (3:1) electrocatalyst for mixed solutions EtOH:MeOH oxidation can result the formation of CO2 at low potentials, as well as the highest amount of by-products than ethanol and methanol.

http://dx.doi.org/10.21577/0103-5053.20160266

Published online: September 29, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1098-1105

Thermodynamic Feasibility of Pure Hydrogen Production and Storage in Iron and Germanium Based Double Chemical Looping Process

Grzegorz Słowiński; Adam Smoliński

How to cite this article

 

The idea of pure hydrogen production and storage in iron and germanium based double chemical looping process.

http://dx.doi.org/10.21577/0103-5053.20160267

Published online: September 29, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1106-1112

Antitubercular Activity Increase in Labdane Diterpenes from Copaifera Oleoresin through Structural Modification

Aline N. Silva; Ana Carolina F. Soares; Mirela M. W. Cabral; Alex R. P. de Andrade; Marilza B. M. da Silva; Carlos H. G. Martins; Rodrigo C. S. Veneziani; Sérgio R. Ambrósio; Jairo K. Bastos; Vladimir C. G. Heleno

How to cite this article

 

Our work with natural diterpenes from Copaifera oilresin led to derivatives with remarkably increased anti-tubercular activity. Derivatives were obtained through synthetic structural modifications and their activities reached two, five and twenty-fold compared to natural precursors.

http://dx.doi.org/10.21577/0103-5053.20160268

Published online: September 30, 2016

J. Braz. Chem. Soc. 2017, 28(6), 1113-1122

Study of Viability of Solid-Phase Microextraction, in vivo, in the Extraction of Microbial Volatile Organic Compounds Associated to the Pigment Production Process by the Monascus Fungus, in Submerged Fermentation

Robson L. Schacker; Denise E. Moritz; Miguel S. B. Caro; Luiz A. S. Madureira; Adriana N. Dias; Josias O. Merib; Douglas Isfran; Eduardo Carasek

How to cite this article

 

Seventeen compounds were found associated with the presence of the Monascus fungus (in vivo solid phase microextraction (SPME)), the main being ethanol, 2-methyl-propanol, 3-methylbutanol, 2-methylbutanol and 2-phenylethanol, such compounds have been studied by empirical models.

http://dx.doi.org/10.21577/0103-5053.20160269

Published online: October 4, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1123-1131

Ethylene Glycol Electro-Oxidation on Platinum-Free Surfaces: How the Composition of PdRuRh Surfaces Influences the Catalysis

Gisele A. B. Mello; Pedro H. B. Fernandes; Martha Janete de Giz; Giuseppe A. Camara

How to cite this article

 

Opposite to Pt, on PdRuRh catalysts CO2 is produced earlier than oxalic acid, and there is no self-inhibitory effect when EG concentration is increased.

http://dx.doi.org/10.21577/0103-5053.20160270

Published online: October 5, 2016

Short Report J. Braz. Chem. Soc. 2017, 28(6), 1132-1136

A New Prenylisoflavone from the Antifungal Extract of Leaves of Vatairea guianensis Aubl.

Ronilson F. Souza; Geilson A. da Silva; Alberto C. Arruda; Milton N. da Silva; Alberdan S. Santos; Daniella P. A. Grisólia; Moises B. Silva; Claudio G. Salgado; Mara Silvia P. Arruda

How to cite this article

 

One new isoflavone, in addition to two known ones were isolated from the leaves of Vatairea guianensis Aubl. (Fabaceae). The extract, AcOEt fraction and two isolated compounds exhibited antifungal activity through in vitro testing.

http://dx.doi.org/10.21577/0103-5053.20160250

Published online: September 1, 2016


J. Braz. Chem. Soc. 2017, 28(6), 1137-1144

Eco-Friendly, Catalyst and Solvent-Free, Synthesis of Acetanilides and N-Benzothiazole-2-yl-acetamides

Silvio Cunha; Lourenço L. B. de Santana

How to cite this article

 

An expeditious and green synthesis of acetamides is described in good yield without external heating, and with simple purification.

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

http://dx.doi.org/10.21577/0103-5053.20160265

Published online: September 27, 2016

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