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de Sousa Cutrim TA, Eloy MA, Barcelos FF, Meireles LM, de Freitas Ferreira LC, Reis TA, Gonçalves SS, Lacerda V, Fronza M, Morais PAB, Scherer R. New thymol-derived triazole exhibits promising activity against Trichophyton rubrum. Braz J Microbiol 2024:10.1007/s42770-024-01295-0. [PMID: 38453819 DOI: 10.1007/s42770-024-01295-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 02/26/2024] [Indexed: 03/09/2024] Open
Abstract
Fungal infections have emerged worldwide, and azole antifungals are widely used to control these infections. However, the emergence of antifungal resistance has been compromising the effectiveness of these drugs. Therefore, the objective of this study was to evaluate the antifungal and cytotoxic activities of the nine new 1,2,3 triazole compounds derived from thymol that were synthesized through Click chemistry. The binding mode prediction was carried out by docking studies using the crystallographic structure of Lanosterol 14α-demethylase G73E mutant from Saccharomyces cerevisiae. The new compounds showed potent antifungal activity against Trichophyton rubrum but did not show relevant action against Aspergillus fumigatus and Candida albicans. For T. rubrum, molecules nº 5 and 8 showed promising results, emphasizing nº 8, whose fungicidal and fungistatic effects were similar to fluconazole. In addition, molecule nº 8 showed low toxicity for keratinocytes and fibroblasts, concluding that this compound demonstrates promising characteristics for developing a new drug for dermatophytosis caused by T. rubrum, or serves as a structural basis for further research.
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Affiliation(s)
- Thiago Antonio de Sousa Cutrim
- Pharmaceutical Sciences Graduate Program, Universidade Vila Velha, Comissário José Dantas de Melo St., 21, Boa Vista, Vila Velha, Espírito Santo, 29102-770, Brazil
| | - Mariana Alves Eloy
- Agrochemical Graduate Program, Federal University of Espírito Santo, Alegre, Espirito Santo, 29500-000, Brazil
| | - Fernando Fontes Barcelos
- Plant Biotechnology Graduate Program, Universidade Vila Velha, Vila Velha, Espírito Santo, 29102-770, Brazil
| | - Leandra Martins Meireles
- Pharmaceutical Sciences Graduate Program, Universidade Vila Velha, Comissário José Dantas de Melo St., 21, Boa Vista, Vila Velha, Espírito Santo, 29102-770, Brazil
| | | | - Tatiana Alves Reis
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Sarah Santos Gonçalves
- Center for Research in Medical Mycology, Department of Pathology, Federal University of Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Valdemar Lacerda
- Chemistry Graduate Program, Universidade Federal Do Espírito Santo, Vitória, Espírito Santo, Brazil
| | - Marcio Fronza
- Pharmaceutical Sciences Graduate Program, Universidade Vila Velha, Comissário José Dantas de Melo St., 21, Boa Vista, Vila Velha, Espírito Santo, 29102-770, Brazil
| | - Pedro Alves Bezerra Morais
- Agrochemical Graduate Program, Federal University of Espírito Santo, Alegre, Espirito Santo, 29500-000, Brazil.
| | - Rodrigo Scherer
- Pharmaceutical Sciences Graduate Program, Universidade Vila Velha, Comissário José Dantas de Melo St., 21, Boa Vista, Vila Velha, Espírito Santo, 29102-770, Brazil.
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Almeida Lima AM, Teixeira RR, Moraes WB, Rocha MR, Moraes AFC, Gomes SC, Gazolla PR, Silva SF, Queiroz VT, Fonseca VR, Romão W, Bezerra Morais PA, Lacerda V, Magalhães de Abreu L, Oliveira FM, Vital de Oliveira O, Costa AV. Synthesis and Fungicide Activity on Asperisporium caricae of Glycerol Derivatives Bearing 1,2,3-Triazole Fragments. J Agric Food Chem 2023; 71:6818-6829. [PMID: 37104821 DOI: 10.1021/acs.jafc.2c08941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In agriculture, the control of fungal infections is essential to improve crop quality and productivity. This study describes the preparation and fungicidal activity evaluation of 12 glycerol derivatives bearing 1,2,3-triazole fragments. The derivatives were prepared from glycerol in four steps. The key step corresponded to the Cu(I)-catalyzed alkyne-azide cycloaddition (CuAAC) click reaction between the azide 4-(azidomethyl)-2,2-dimethyl-1,3-dioxolane (3) and different terminal alkynes (57-91% yield). The compounds were characterized by infrared spectroscopy, nuclear magnetic resonance (1H and 13C), and high-resolution mass spectrometry. The in vitro assessment of the compounds on Asperisporium caricae, that is, the etiological agent of papaya black spot, at 750 mg L-1 showed that the glycerol derivatives significantly inhibited conidial germination with different degrees of efficacy. The most active compound 4-(3-chlorophenyl)-1-((2,2-dimethyl-1,3-dioxolan-4-yl) methyl)-1H-1,2,3-triazole (4c) presented a 91.92% inhibition. In vivo assays revealed that 4c reduced the final severity (70.7%) and area under the disease severity progress curve of black spots on papaya fruits 10 days after inoculation. The glycerol-bearing 1,2,3-triazole derivatives also present agrochemical-likeness properties. Our in silico study using molecular docking calculations show that all triazole derivatives bind favorably to the sterol 14α-demethylase (CYP51) active site at the same region of the substrate lanosterol (LAN) and fungicide propiconazole (PRO). Thus, the mechanism of action of the compounds 4a-4l may be the same as the fungicide PRO, blocking the entrance/approximation of the LAN into the CYP51 active site by steric effects. The reported results point to the fact that the glycerol derivatives may represent a scaffold to be explored for the development of new chemical agents to control papaya black spot.
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Affiliation(s)
- Angela Maria Almeida Lima
- Departamento de Química e Física, Grupo de Pesquisa de Estudos Aplicados em Produtos Naturais e Síntese Orgânica (GEAPS), Universidade Federal Do Espírito Santo, Alto Universitário, Alegre 29500-000, Espírito Santo State, Brazil
| | - Róbson Ricardo Teixeira
- Departamento de Química, Grupo de Síntese e Pesquisa de Compostos Bioativos (GSPCB), Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n, Viçosa 36570-900, Minas Gerais State, Brazil
| | - Willian Bucker Moraes
- Departamento de Agronomia, Universidade Federal Do Espírito Santo, Alto Universitário, s/n, Guararema, Alegre 29500-000, Espírito Santo State, Brazil
| | - Matheus Ricardo Rocha
- Departamento de Agronomia, Universidade Federal Do Espírito Santo, Alto Universitário, s/n, Guararema, Alegre 29500-000, Espírito Santo State, Brazil
| | - Arlan Figueiredo Carvalho Moraes
- Departamento de Química e Física, Grupo de Pesquisa de Estudos Aplicados em Produtos Naturais e Síntese Orgânica (GEAPS), Universidade Federal Do Espírito Santo, Alto Universitário, Alegre 29500-000, Espírito Santo State, Brazil
| | - Sâmela Cansi Gomes
- Departamento de Agronomia, Universidade Federal Do Espírito Santo, Alto Universitário, s/n, Guararema, Alegre 29500-000, Espírito Santo State, Brazil
| | - Poliana Rodrigues Gazolla
- Departamento de Química, Grupo de Síntese e Pesquisa de Compostos Bioativos (GSPCB), Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n, Viçosa 36570-900, Minas Gerais State, Brazil
| | - Silma Francielle Silva
- Departamento de Química, Grupo de Síntese e Pesquisa de Compostos Bioativos (GSPCB), Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n, Viçosa 36570-900, Minas Gerais State, Brazil
| | - Vagner Tebaldi Queiroz
- Departamento de Química e Física, Grupo de Pesquisa de Estudos Aplicados em Produtos Naturais e Síntese Orgânica (GEAPS), Universidade Federal Do Espírito Santo, Alto Universitário, Alegre 29500-000, Espírito Santo State, Brazil
| | - Victor Rocha Fonseca
- Laboratório de Petroleômica e Forense Epartamento de Química, Universidade Federal Do Espírito Santo, Av. Fernando Ferrari 514, Vitória 29075-910, Espírito Santo State, Brazil
| | - Wanderson Romão
- Laboratório de Petroleômica e Forense Epartamento de Química, Universidade Federal Do Espírito Santo, Av. Fernando Ferrari 514, Vitória 29075-910, Espírito Santo State, Brazil
| | - Pedro Alves Bezerra Morais
- Departamento de Química e Física, Grupo de Pesquisa de Estudos Aplicados em Produtos Naturais e Síntese Orgânica (GEAPS), Universidade Federal Do Espírito Santo, Alto Universitário, Alegre 29500-000, Espírito Santo State, Brazil
| | - Valdemar Lacerda
- Laboratório de Petroleômica e Forense Epartamento de Química, Universidade Federal Do Espírito Santo, Av. Fernando Ferrari 514, Vitória 29075-910, Espírito Santo State, Brazil
| | - Lucas Magalhães de Abreu
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-977, Minas Gerais, Brazil
| | - Fabrício Marques Oliveira
- Instituto Federal de Minas Gerais (IFMG), Campus Ouro Branco, Ouro Branco 36420-000, Minas Gerais, Brazil
| | | | - Adilson Vidal Costa
- Departamento de Química e Física, Grupo de Pesquisa de Estudos Aplicados em Produtos Naturais e Síntese Orgânica (GEAPS), Universidade Federal Do Espírito Santo, Alto Universitário, Alegre 29500-000, Espírito Santo State, Brazil
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Costa TLG, Vieira MA, Gonçalves GR, Cipriano DF, Lacerda V, Gonçalves AS, Scopel WL, de Siervo A, Freitas JCC. Combined computational and experimental study about the incorporation of phosphorus into the structure of graphene oxide. Phys Chem Chem Phys 2023; 25:6927-6943. [PMID: 36805087 DOI: 10.1039/d2cp03666e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Phosphorus-containing graphene-based hybrids are materials with outstanding properties for diverse applications. In this work, an easy route to produce phosphorus-graphene oxide hybrid materials is described, involving the use of variable amounts of H3PO4 and H2SO4 during the reaction of oxidation of a graphitic precursor. The physical and chemical features of the hybrids change significantly with the variation in the acid amounts used in the syntheses. XPS and solid-state 13C and 31P NMR results show that the hybrids contain large amounts of oxygen functional groups, with the phosphorus incorporation proceeding mostly through the formation of phosphate-like linkages and other functions with C-O-P bonds. The experimental findings are supported by DFT calculations, which allow the assessment of the energetics and the geometry of the interaction between phosphate groups and graphene-based models; these calculations are also used to predict the chemical shifts in the 31P and 13C NMR spectra of the models, which show good agreement with the experimentally observed solid-state NMR spectra.
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Affiliation(s)
- Tainara L G Costa
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil.
| | - Mariana A Vieira
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil. .,Department of Physics, University of Alberta, Edmonton, AB T6G 2E1, Canada
| | - Gustavo R Gonçalves
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil.
| | - Daniel F Cipriano
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil.
| | - Valdemar Lacerda
- Federal Institute of Education, Science and Technology of Espírito Santo (IFES), Av. Min. Salgado Filho, 1000, 29106-010, Vila Velha, ES, Brazil
| | - Arlan S Gonçalves
- Laboratory of Organic Chemistry, Department of Chemistry, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil
| | - Wanderlã L Scopel
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil.
| | - Abner de Siervo
- Institute of Physics Gleb Wataghin - State University of Campinas (UNICAMP), Rua Sergio Buarque de Holanda 777, 13083-859, Campinas, SP, Brazil
| | - Jair C C Freitas
- Laboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, 29075-910, Vitória, ES, Brazil.
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Alves Bezerra Morais P, Britto KB, Messias E, de Andrade P, Werner E, Costa AV, Lacerda V, Pinheiro CJG, de Paula H, Borges WDS. Synthesis and Phytotoxic Evaluation of Isatin Derivatives Supported by 3D-QSAR Study. J Agric Food Chem 2023; 71:255-266. [PMID: 36583683 DOI: 10.1021/acs.jafc.2c06500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Concerned about weed infestation, a major threat to food production and herbicide resistance that interferes in the mechanism of action of the main herbicides, we have synthesized eight isatin derivatives using the "Click Chemistry" approach through copper-catalyzed azide-alkyne cycloadditions (CuAAC). Sixteen isatin derivatives were evaluated for their phytotoxic activity against the seed culture of the model plants, Lactuca sativa and Allium cepa. Six of them showed phytotoxic activity similar to the positive control, trifluralin. Hypocotyl length measurement analysis in L. sativa revealed that triazole derivative 8 is more active than trifluralin. For A. cepa, root length measurement analyses revealed that 3, 10, 14, 16, and 17 were similar to the positive control trifluralin. Three-dimensional quantitative structure-activity relationship (3D-QSAR) comparative molecular field analysis (CoMFA) model construction using the acetolactate synthase (ALS) crystallographic structure displayed pki values of predicted inhibitory activity and contour maps revealing sterically bulky groups for 11, the CF3 group in ortho, and for 17, Br in ortho, favoring the inhibitory ALS activity.
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Affiliation(s)
- Pedro Alves Bezerra Morais
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000Alegre, ES, Brazil
| | - Karolinni B Britto
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Espírito Santo, 29075910Vitória, ES, Brazil
| | - Evandro Messias
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000Alegre, ES, Brazil
| | - Peterson de Andrade
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, ManchesterM1 7DN, U.K
| | - Elias Werner
- Programa de Pós-Graduação em Biologia Vegetal, Universidade Federal do Espírito Santo, 29075-910Vitória, ES, Brazil
| | - Adilson Vidal Costa
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000Alegre, ES, Brazil
| | - Valdemar Lacerda
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910Vitória, ES, Brazil
| | | | - Heberth de Paula
- Centro de Ciências Exatas, Naturais e da Saúde, Universidade Federal do Espírito Santo, 29500000Alegre, ES, Brazil
| | - Warley de Souza Borges
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910Vitória, ES, Brazil
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Santos LP, Nascimento MHC, Barros IHAS, Santos NA, Lacerda V, Filgueiras PR, Romão W. Portable Raman spectroscopy applied to the study of drugs of abuse. J Forensic Sci 2022; 67:1399-1416. [DOI: 10.1111/1556-4029.15011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/07/2021] [Accepted: 01/26/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Layla P. Santos
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense) Vila Velha Brazil
| | - Marcia H. C. Nascimento
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
| | - Iago H. A. S. Barros
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
| | - Nayara A. Santos
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense) Vila Velha Brazil
| | - Valdemar Lacerda
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
| | - Paulo R. Filgueiras
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
| | - Wanderson Romão
- Laboratório de Petroleômica e Forense Universidade Federal do Espírito Santo (UFES) Vitória Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense) Vila Velha Brazil
- Instituto Federal do Espírito Santo (IFES) Vila Velha Brazil
- Academia Brasileira de Ciências (ABC) Rio de Janeiro Brazil
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Coelho Neto D, Moreira L, Castro E, Souza W, Filgueiras P, Romão W, Folli G, Lacerda V. ESTUDO DO PERFIL QUÍMICO DE CERVEJAS BRASILEIRAS: UMA AVALIAÇÃO ENTRE AS BEBIDAS ARTESANAIS E INDUSTRIAIS. QUIM NOVA 2022. [DOI: 10.21577/0100-4042.20170857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
STUDY OF THE CHEMICAL PROFILE OF BRAZILIAN BEERS: AN ASSESSMENT BETWEEN ARTISANAL AND INDUSTRIAL DRINKS. Beer is commonly produced with four inputs: water, malt, hops, yeast and, in some cases, brewing adjuncts. Industrial and artisanal processes essentially follow the same steps and may undergo minor changes due to the style of beer. Despite this, many consumers attribute higher quality to craft beer compared to industrial ones. In this study, we applied the analytical techniques of infrared (IR), hydrogen nuclear magnetic resonance (1 H NMR) and mass spectrometry (ESI(±)FT-ICR MS) to discriminate craft beers from industrial ones (brands common to the Brazilian market). In addition, Partial Least Squares (PLS) and Support Vector Machine (SVR) regression were used to estimate some beer properties (pH, total acidity (meq·L-1, color (EBC), bitterness (IBU), alcohol content (%v/v) and density (g·mL-1)). The use of the IR allowed the identification of vibrations attributed to chemical compounds common to beverages, such as water (3320 and 1640 cm–1), carbohydrates (1500 cm–1) and ethanol (1050-1040 and 875-865 cm–1). 1 H NMR showed good applicability in identifying classes of organic compounds in the beverage, where signs attributed to alcohols, organic acids, carbohydrates and amino acids were observed. The ESI(+)FT-ICR MS allowed the identification of chemical compounds present in beverages, allowing the construction of a fingerprint of the beers. In addition, the application of chemometric tools enabled the prediction of physicochemical properties, presenting promising results in the prediction of alcohol content (RMSEC 0.2430 and RMSEP 0.3929) and bitterness (RMSEC 1.3022 and RMSEP 1.6008), and also in the classification regarding the manufacturing process (craft and industrial beer).
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Ribeiro R, Eloy MA, Francisco CS, Javarini CL, Ayusso GM, Da Rocha Fonseca V, Romão W, Regasini LO, Araujo SC, Almeida MO, Honorio KM, de Paula H, Lacerda V, Morais PAB. Flavonoid derivatives targeting BCR-ABL kinase: Semisynthesis, Molecular dynamic simulations and Enzymatic inhibition. Curr Top Med Chem 2021; 21:1999-2017. [PMID: 34225623 DOI: 10.2174/1568026621666210705170047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/04/2021] [Accepted: 05/15/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Natural products have been universally approached in the research of novel trends useful to detail the essential paths of the life sciences and as a strategy for pharmacotherapeutics. OBJECTIVE This work focuses on further modification to the 6-hydroxy-flavanone building block aiming to obtain improved BCR-ABL kinase inhibitors. METHODS Ether derivatives were obtained from Williamson synthesis and triazole from Microwave-assisted click reaction. Chemical structures were finely characterized through IR, 1H and 13C NMR and HRMS. They were tested for their inhibitory activity against BCR-ABL kinase. RESULTS Two inhibitors bearing a triazole ring as a pharmacophoric bridge demonstrated the strongest kinase inhibition at IC50 value of 364 nM (compound 3j) and 275 nM (compound 3k). CONCLUSION 6-hydroxy-flavanone skeleton can be considered as a promising core for BCR-ABL kinase inhibitors.
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Affiliation(s)
- Rayssa Ribeiro
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre - ES , Brazil
| | - Mariana Alves Eloy
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre - ES , Brazil
| | - Carla Santana Francisco
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória - ES , Brazil
| | - Clara Lirian Javarini
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória - ES , Brazil
| | - Gabriela Miranda Ayusso
- Programa de Pós-Graduação em Microbiologia, Universidade Estadual Paulista Julio de Mesquita Filho, 15054-000, São José do Rio Preto - SP, Brazil
| | - Victor Da Rocha Fonseca
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória - ES , Brazil
| | - Wanderson Romão
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória - ES , Brazil
| | - Luis Octavio Regasini
- Programa de Pós-Graduação em Microbiologia, Universidade Estadual Paulista Julio de Mesquita Filho, 15054-000, São José do Rio Preto - SP, Brazil
| | | | | | | | - Heberth de Paula
- Centro de Ciências Exatas, Naturais e da Saúde, Universidade Federal do Espírito Santo, 29500000, Alegre - ES, Brazil
| | - Valdemar Lacerda
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória - ES , Brazil
| | - Pedro Alves Bezerra Morais
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre - ES , Brazil
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Alves Eloy M, Ribeiro R, Martins Meireles L, Antonio de Sousa Cutrim T, Santana Francisco C, Lirian Javarini C, Borges WDS, Costa AV, Queiroz VTD, Scherer R, Lacerda V, Alves Bezerra Morais P. Thymol as an Interesting Building Block for Promising Fungicides against Fusarium solani. J Agric Food Chem 2021; 69:6958-6967. [PMID: 34152748 DOI: 10.1021/acs.jafc.0c07439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The semisynthesis of 15 new thymol derivatives was achieved through Williamson synthesis and copper-catalyzed azide-alkyne cycloaddition (CuAAC) approaches. The reaction of CuAAC using the "Click Chemistry" strategy, in the presence of an alkynyl thymol derivative and commercial or prepared azides, provided nine thymol derivatives under microwave irradiation. This procedure reduces reaction time and cost. All molecular entities were elucidated by 1H and 13C NMR, IR, and HRMS data. These derivatives were evaluated in vitro for their fungicidal activity against Fusarium solani sp. Among the nine triazolic thymol derivatives obtained, seven of them were found to have moderated antifungal activity. In contrast, naphthoquinone/thymol hybrid ether 2b displayed activity comparable with that of the commercial fungicide thiabendazole. The structure-activity relationship for the most active compound 2b was discussed, and the mode of action was predicted by a possible binding to the fungic ergosterol and interference of osmotic balance of K+ into the extracellular medium.
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Affiliation(s)
- Mariana Alves Eloy
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre, Espirito Santo, Brazil
| | - Rayssa Ribeiro
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre, Espirito Santo, Brazil
| | - Leandra Martins Meireles
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Vila Velha, 29103-900, Vila Velha, Espirito Santo, Brazil
| | - Thiago Antonio de Sousa Cutrim
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Vila Velha, 29103-900, Vila Velha, Espirito Santo, Brazil
| | - Carla Santana Francisco
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória, Espirito Santo, Brazil
| | - Clara Lirian Javarini
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória, Espirito Santo, Brazil
| | - Warley de Souza Borges
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória, Espirito Santo, Brazil
| | - Adilson Vidal Costa
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre, Espirito Santo, Brazil
| | - Vagner Tebaldi de Queiroz
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre, Espirito Santo, Brazil
| | - Rodrigo Scherer
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Vila Velha, 29103-900, Vila Velha, Espirito Santo, Brazil
| | - Valdemar Lacerda
- Programa de Pós-Graduação em Química, Universidade Federal do Espírito Santo, 29075910, Vitória, Espirito Santo, Brazil
| | - Pedro Alves Bezerra Morais
- Programa de Pós-Graduação em Agroquímica, Universidade Federal do Espírito Santo, 29500000, Alegre, Espirito Santo, Brazil
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David GF, Pereira SDPS, Fernandes SA, Cubides-Roman DC, Siqueira RK, Perez VH, Lacerda V. Fast pyrolysis as a tool for obtaining levoglucosan after pretreatment of biomass with niobium catalysts. Waste Manag 2021; 126:274-282. [PMID: 33784571 DOI: 10.1016/j.wasman.2021.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/01/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
Levoglucosan (LGA) is a promising chemical platform derived from the pyrolysis of biomass that offers access to a variety of value-added products. We report an efficient route to produce LGA via the pretreatment of biomass with niobium compounds (oxalate, chloride and oxide) followed by fast pyrolysis coupled with gas chromatography-mass spectrometry (Py-GC-MS) at temperatures of 350-600 °C. Catalytic pretreatment reduces the quantity of lignin in the biomass, concentrates the cellulose and enhance LGA formation during fast pyrolysis. The pretreatment also removes alkaline metals, preventing competitive side reactions. The effect of several parameters such as catalyst weight, time, temperature, and solvent, with the optimal pretreatment conditions determined to be 3 (wt.%) niobium oxalate for 1 h at 23 °C in water. Pretreatment increased the LGA yields by 6.40-fold for sugarcane bagasse, 4.15-fold for elephant grass, 4.13-fold for rice husk, 2.86-fold for coffee husk, and 1.86-fold for coconut husk as compared to the raw biomasses. These results indicate that biomass pretreatment using niobium derivates prior fast pyrolysis can be a promising technique for biomass thermochemical conversion in LGA and others important pyrolytic products.
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Affiliation(s)
- Geraldo Ferreira David
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Sarah de Paiva Silva Pereira
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Sergio Antonio Fernandes
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Diana Catalina Cubides-Roman
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Rogério Krohling Siqueira
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Victor Haber Perez
- Center of Sciences and Agricultural Technologies, State University of Northern of Rio de Janeiro, RJ 28013-602, Brazil
| | - Valdemar Lacerda
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil.
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Sousa S, Teixeira R, Costa A, Aguiar A, Fonseca V, Lacerda V, Romão W, Oliveira L, Ribeiro I, Nogueira K, Nascimento C, Junker J. SÍNTESE DE NOVOS 1,2,3-TRIAZÓIS INSPIRADOS NO SRPIN340 E AVALIAÇÃO DE SEUS EFEITOS EM LINHAGEM CELULAR DE GLIOBLASTOMA HUMANO. QUIM NOVA 2021. [DOI: 10.21577/0100-4042.20170793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
SYNTHESIS OF NOVEL 1,2,3-TRIAZOLES INSPIRED ON THE SRPIN340 AND EVALUATION OF THEIR EFFECTS ON HUMAN GLIOBLASTOMA CELL LINE. It is herein described the synthesis of a series of thirty novel 1,2,3-triazole1,4-disubstituted compounds inspired on the known SRPKs inhibitor N-(2-(piperidin-1-yl)-5-(trifluoromethyl)phenyl)isonicotinamide (SRPIN340) and biological evaluation of them against human glioblastoma multiforme cell line U87MG. Starting with 1-fluoro2-nitro-4- (trifluoromethyl)benzene (1), the substances were prepared via a five-step synthetic route. The crucial step corresponded to the copper-catalyzed cycloaddition reaction between trifluoromethyl phenyl azides and different alkynes. In general, the compounds were obtained with good yields and they were characterized utilizing spectroscopic (IR and NMR) and spectrometric (HRMS) techniques. The evaluation of the synthesized compounds at three different treatment time (24 h, 48 h, and 72 h) and concentrations (50, 100, and 150 µmol L-1) revealed that five derivatives were capable of reducing cell viability by 50% after 72 h of treatment at the highest concentration. On the contrary, three derivatives significantly increased cell viability being this effect more pronounced after 48 h of treatment. In this regard, it stands out the compound 2-((1-(2-morpholino-5-(trifluoromethyl)phenyl)-1H-1,2,3-triazol4-yl)methyl)isoindoline-1,3-dione (7) which increased cell viability in approximately 300% after 48 h of treatment at 100 µmol L-1. The substances that increased cell viaiblity present as common structural features the presence of a saturated nitrogen-containing six-membered ring and carbonylated fragments.
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Lyrio M, Feu A, Motta L, Figueroa L, Boasquevisque L, Pinto R, Rosa A, Arantes H, Bottocim R, Fonseca V, Santos N, Lacerda V, Castro E, Romão W. COMPARANDO O DESEMPENHO DE DOIS ANALISADORES DE MASSAS (FT-ICR MS & LTQ MS): UMA AULA EXPERIMENTAL SOBRE ANÁLISE DE COMPOSTOS ORGÂNICOS. QUIM NOVA 2021. [DOI: 10.21577/0100-4042.20170832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
COMPARING THE PERFORMANCE OF TWO MASS ANALYZERS (FT-ICR MS & LTQ MS): AN EXPERIMENTAL CLASS ON ANALYSIS OF ORGANIC COMPOUNDS. Mass spectrometry (MS) is a high-performance analytical technique that allows a measurement of the mass/charge (m/z) ratio of compounds present in a sample. MS is able to separate two m/z ions with determined values (mass resolution), being an important characteristic, especially in the analysis of biochemical components and complex mixtures. Mass analyzers define the resolving power and accuracy of different types of mass spectrometers. Herein, the performance of two mass analyzers (Fourier Transform Ion Cyclotronic Resonance (FT-ICR) and quadrupole ion trap (LTQ)) was tested on low (Mw = 165-679 Da) and high (Mw = 783-8.58 kDa) molecular weight molecules (Phenacetin, Procaine, Benzocaine, Caffeine anhydrous, Lidocaine, two metal porphyrin standards, the first cobalt and the second vanadium, and two protein standards, Ubiquitin and Beauvericin), and finally, for an oil sample. LTQ-MS and FT-ICR-MS had similar performance and high reproducibility. However, the mass accuracy and resolution power of the FT-ICR (error lower than 5 ppm and RP higher than 400,000) was higher, being therefore, it was more suitable for the analysis of proteins and oil, for instance. On the other hand, the CID analysis via LTQ demonstrated its applicability in fragmentation experiments, being able to determinate the chemical connectivity of organic compounds in non-complex mixtures.
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Correia R, Cunha P, Agnoletti B, Pereira L, Partelli F, Filgueiras P, Lacerda V, Romão W. INFRAVERMELHO PORTÁTIL NA REGIÃO DO PRÓXIMO (NIR) APLICADO NO CONTROLE DE QUALIDADE DE CAFÉS ADULTERADO POR BORRA. QUIM NOVA 2021. [DOI: 10.21577/0100-4042.20170850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
PORTABLE NEAR INFRARED SPECTROSCOPY APPLIED TO THE QUALITY CONTROL OF COFFEE ADULTERED BY GROUNDS. The objective of this work was to control the purity level of canephora coffees (Conilon coffee) from the state of Espírito Santo (Brazil), as a function of the addition of grounds produced by the coffees themselves using a portable microspectrometer in the infrared region. (microNIR), associated with chemometric tools. The PCA model grouped the coffees according to the level of adulterant in the samples and showed that the presence of moisture and polysaccharides is important for the discrimination between pure and adulterated samples. PLS-DA and SIMCA classification models were built with commercial samples and resulted in the discrimination of authentic and non-authentic samples with accuracy values above 90% and 82% for PLS-DA and SIMCA, respectively. The quantification results presented by the PLS model were satisfactory for all models, reaching the best results at 75 °C with RMSEP values of 6.13 wt%, R2p = 0.9917; and LOD in the range of 5.6-8.9 wt%; LOQ = 17-26.8 wt%, according to IUPAC; relative standard deviation for repeatability of 1.0 and 1.7 wt%; and intermediate precision of 3.4 and 1.1 wt% for low (<10 wt%) and high (≈ 90 wt%) levels of adulterants, respectively. Therefore, this work represents the first exploratory study to analyze adulterations with coffee grounds by portable NIR, demonstrating the potential of the equipment against this type of adulteration.
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Correia RM, Andrade R, Tosato F, Nascimento MT, Pereira LL, Araújo JB, Pinto FE, Endringer DC, Padovan MP, Castro EV, Partelli FL, Filgueiras PR, Lacerda V, Romão W. Analysis of Robusta coffee cultivated in agroforestry systems (AFS) by ESI-FT-ICR MS and portable NIR associated with sensory analysis. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Borghi FT, Santos PC, Santos FD, Nascimento MH, Corrêa T, Cesconetto M, Pires AA, Ribeiro AV, Lacerda V, Romão W, Filgueiras PR. Quantification and classification of vegetable oils in extra virgin olive oil samples using a portable near-infrared spectrometer associated with chemometrics. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105544] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Dos Santos NA, Macrino CJ, Allochio Filho JF, Gonçalves FF, Almeida CM, Agostini F, Guizolfi T, Moura S, Lacerda V, Filgueiras PR, Ortiz RS, Romão W. Exploring the chemical profile of designer drugs by ESI(+) and PSI(+) mass spectrometry-An approach on the fragmentation mechanisms and chemometric analysis. J Mass Spectrom 2020; 55:e4596. [PMID: 32729201 DOI: 10.1002/jms.4596] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/11/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
The consumption of design drugs, frequently known as new psychoactive substances (NPS), has increased considerably worldwide, becoming a severe issue for the responsible governmental agencies. These illicit substances can be defined as synthetic compounds produced in clandestine laboratories in order to act as analogs of schedule drugs mimetizing its chemical structure and improving its pharmacological effects while hampering the control and making regulation more complicated. In this way, the development of new methodologies for chemical analysis of NPS drugs is indispensable to determine a novel class of drugs arising from the underground market. Therefore, this work shows the use of high-resolution mass spectrometry Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) applying different ionization sources such as paper spray ionization (PSI) and electrospray ionization (ESI) in the evaluation of miscellaneous of seized drugs samples as blotter paper (n = 79) and tablet (n = 100). Also, an elucidative analysis was performed by ESI(+)MS/MS experiments, and fragmentation mechanisms were proposed to confirm the chemical structure of compounds identified. Besides, the results of ESI(+) and PSI(+)-FT-ICR MS were compared with those of GC-MS, revealing that ESI(+)MS showed greater detection efficiency among the methodologies employed in this study. Moreover, this study stands out as a guide for the chemical analysis of NPS drugs, highlighting the differences between the techniques of ESI(+)-FT-ICR MS, PSI(+)-FT-ICR MS, and GC-MS.
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Affiliation(s)
- Nayara A Dos Santos
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
| | - Clebson J Macrino
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
| | - João Francisco Allochio Filho
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Instituto Federal do Espírito Santo (IFES), Rodovia BR-101 Norte, Km 58, Litorâneo, São Mateus, Espírito Santo, 29932-540, Brazil
| | - Fernanda F Gonçalves
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
| | - Camila M Almeida
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
| | - Fabiana Agostini
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Rio Grande do Sul, 95020260, Brazil
| | - Tainara Guizolfi
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Rio Grande do Sul, 95020260, Brazil
| | - Sidnei Moura
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Rio Grande do Sul, 95020260, Brazil
| | - Valdemar Lacerda
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
| | - Paulo R Filgueiras
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
| | - Rafael S Ortiz
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Superintendência da Polícia Federal no Rio Grande Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Wanderson Romão
- Laboratório de Petroleômica e Forense, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES, CEP: 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Vitoria, Brazil
- Instituto Federal do Espírito Santo (IFES), Av. Ministro Salgado Filho, Soteco, Vila Velha, Espírito Santo, 29106-010, Brazil
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Filho JFA, Dos Santos NA, Borges KB, Lacerda V, Pelição FS, Romão W. Fiber spray ionization mass spectrometry in forensic chemistry: A screening of drugs of abuse and direct determination of cocaine in urine. Rapid Commun Mass Spectrom 2020; 34 Suppl 3:e8747. [PMID: 32056289 DOI: 10.1002/rcm.8747] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 01/30/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
RATIONALE Ambient mass spectrometry techniques are much required in forensic chemistry to evaluate evidence with low analytical interference, high confidence, and accuracy. However, traditional methodologies, such as paper spray ionization, have been shown to present low sensitivity in the analysis of illicit drugs from biological matrices. METHODS Fiber spray ionization mass spectrometry (FSI-MS) was developed using a capillary polypropylene (PP) hollow fiber. Seized samples of drugs, i.e. a tablet, blotter paper, hashish, and cocaine powder, were analyzed. Cocaine was quantified from whole urine by dipping the fiber directly into solution. FSI-MS was tested for the analysis of a sample of urine obtained from a drug abuse suspect. RESULTS The FSI(+) analysis showed the detection of different types of synthetic drugs in tablet and blotter paper samples, e.g. amphetamine, cathinones, phenethylamines, and opioids, while pure cocaine and different types of coca alkaloids were identified from cocaine powder with good sensitivity and high mass accuracy. The hashish analysis by FSI(-) revealed signals of cannabinoids, cannabinoid acids, and cannabinoid derivatives, detected mainly as [M - H]- ions or chlorine adducts [M + Cl]- . The quantification of cocaine in whole urine showed good sensitivity and precision with limits of detection and quantification of 5.16 and 17.21 ng/mL, respectively, linearity above 0.999, and relative standard deviation below 2.71%. The evaluation of seized sample of urine showed the detection of cocaine with relative ion intensity greater than 36%, as well as the metabolites benzoylecgonine and cocaethylene with a relative intensity of 1.4% and 6%, respectively. CONCLUSIONS The developed FSI-MS method has the potential to be applied to forensic sample evaluation as well as to determine illicit drugs from biological matrices in toxicological analysis. The use of a capillary PP fiber has advantages as an extractor agent and ionizing substrate, and also the feature of it being dipped directly into the sample, thus preserving the integrity of the sample, which makes this a very promising ambient mass spectrometry method and relevant to forensic chemistry.
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Affiliation(s)
- João Francisco Allochio Filho
- Laboratório de Petroleômica e Química Forense, Departamento de Química, Universidade Federal do Espírito Santo, Vitória, ES, 29075-910, Brazil
- Instituto Federal do Espírito Santo, São Mateus, ES, 29932-540, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Brazil
| | - Nayara A Dos Santos
- Laboratório de Petroleômica e Química Forense, Departamento de Química, Universidade Federal do Espírito Santo, Vitória, ES, 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, São João del-Rei, MG, 36301-160, Brazil
| | - Valdemar Lacerda
- Laboratório de Petroleômica e Química Forense, Departamento de Química, Universidade Federal do Espírito Santo, Vitória, ES, 29075-910, Brazil
| | - Fabrício Souza Pelição
- Departamento Médico Legal, Polícia Civil do Espírito Santo (PC-ES), Vitória, ES, 29045-402, Brazil
| | - Wanderson Romão
- Laboratório de Petroleômica e Química Forense, Departamento de Química, Universidade Federal do Espírito Santo, Vitória, ES, 29075-910, Brazil
- Instituto Nacional de Ciência e Tecnologia Forense (INCT Forense), Brazil
- Instituto Federal do Espírito Santo, Vila Velha, ES, 29106-010, Brazil
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Francisco CS, Javarini CL, de S Barcelos I, Morais PAB, de Paula H, de S Borges W, Neto ÁC, Lacerda V. Synthesis of Coumarin Derivatives as Versatile Scaffolds for GSK-3β Enzyme Inhibition. Curr Top Med Chem 2020; 20:153-160. [PMID: 31648640 DOI: 10.2174/1568026619666191019105349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/05/2019] [Accepted: 10/07/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Glycogen synthase kinase-3 (GSK-3) is involved in the phosphorylation and inactivation of glycogen synthase. GSK-3 inhibitors have been associated with a variety of diseases, including Alzheimer´s disease (AD), diabetes type II, neurologic disorders, and cancer. The inhibition of GSK-3β isoforms is likely to represent an effective strategy against AD. OBJECTIVE The present work aimed to design and synthesize coumarin derivatives to explore their potential as GSK-3β kinase inhibitors. METHODS The through different synthetic methods were used to prepare coumarin derivatives. The GSK-3β activity was measured through the ADP-Glo™ Kinase Assay, which quantifies the kinasedependent enzymatic production of ADP from ATP, using a coupled-luminescence-based reaction. A docking study was performed by using the crystallographic structure of the staurosporine/GSK-3β complex [Protein Data Bank (PDB) code: 1Q3D]. RESULTS The eleven coumarin derivatives were obtained and evaluated as potential GSK-3β inhibitors. Additionally, in silico studies were performed. The results revealed that the compounds 5c, 5d, and 6b inhibited GSK-3β enzymatic activity by 38.97-49.62% at 1 mM. The other coumarin derivatives were tested at 1 mM, 1 µM, and 1 nM concentrations and were shown to be inhibitor candidates, with significant IC50 (1.224-6.875 µM) values, except for compound 7c (IC50 = 10.809 µM). Docking simulations showed polar interactions between compound 5b and Lys85 and Ser203, clarifying the mechanism of the most potent activity. CONCLUSION The coumarin derivatives 3a and 5b, developed in this study, showed remarkable activity as GSK-3β inhibitors.
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Affiliation(s)
- Carla S Francisco
- Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, 29075-910 Vitoria - ES, Brazil
| | - Clara L Javarini
- Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, 29075-910 Vitoria - ES, Brazil
| | | | - Pedro A B Morais
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500-000 Alegre - ES, Brazil
| | - Heberth de Paula
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500-000 Alegre - ES, Brazil
| | - Warley de S Borges
- Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, 29075-910 Vitoria - ES, Brazil
| | - Álvaro Cunha Neto
- Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, 29075-910 Vitoria - ES, Brazil
| | - Valdemar Lacerda
- Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, 29075-910 Vitoria - ES, Brazil
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Dutra FVA, Pires BC, Coelho MM, Costa RA, Francisco CS, Lacerda V, Borges KB. Restricted access macroporous magnetic polyaniline for determination of coumarins in rat plasma. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Coumarins (2H-chromen-2-ones) are heterocyclic compounds of wide scientific
interest due to their important biological and pharmaceutical properties such as antitumor,
antioxidant, anti-inflammatory and antimicrobial activities as well as enzymatic inhibitors
related to neurodegenerative diseases. Due to their structural variability, this compound
class has been attracting considerable interest in the natural products and synthetic organic
chemistry areas. Coumarins and their derivatives have been prepared by a variety of methods,
including Perkin, Wittig and Reformatsky reactions, Pechmann and Knoevenagel
condensations, and Claisen rearrangement, among others. In the present review we report
the different synthetic methods used in the preparation of coumarin derivatives exploited
in the last ten years (from 2008 to 2018), regarding the research demand for new structural
scaffolds.
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Affiliation(s)
- Carla S. Francisco
- Programa de Pós-Graduação em Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Campus Goiabeiras, Vitória, Brazil
| | - Cristina S. Francisco
- Programa de Pós-Graduação em Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Campus Goiabeiras, Vitória, Brazil
| | | | - Álvaro Cunha Neto
- Programa de Pós-Graduação em Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Campus Goiabeiras, Vitória, Brazil
| | - Valdemar Lacerda
- Programa de Pós-Graduação em Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Campus Goiabeiras, Vitória, Brazil
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Santos P, Tosato F, Cesconetto M, Corrêa T, Santos F, Lacerda V, Pires A, Ribeiro A, Filgueiras P, Romão W. DETERMINAÇÃO DA AUTENTICIDADE DE AMOSTRAS DE AZEITE COMERCIAIS APREENDIDAS NO ESTADO DO ESPÍRITO SANTO USANDO UM ESPECTROFOTÔMETRO PORTÁTIL NA REGIÃO DO NIR. QUIM NOVA 2020. [DOI: 10.21577/0100-4042.20170550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Cole ER, de Andrade JP, Filho JFA, Schmitt EFP, Alves-Araújo A, Bastida J, Endringer DC, de S. Borges W, Lacerda V. Cytotoxic and Genotoxic Activities of Alkaloids from the Bulbs of Griffinia gardneriana and Habranthus itaobinus (Amaryllidaceae). Anticancer Agents Med Chem 2019; 19:707-717. [DOI: 10.2174/1871520619666190118122523] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/31/2018] [Accepted: 01/07/2019] [Indexed: 01/04/2023]
Abstract
Background:
Amaryllidaceae plants are known to be a great source of alkaloids, which are considered
an extensive group of compounds encompassing a wide range of biological activities. The remarkable
cytotoxic activities observed in most of the Amaryllidaceae alkaloids derivatives have prompt the chemical and
biological investigations in unexplored species from Brazil.
Objective:
To evaluate the cytotoxic and genotoxic properties of alkaloids of Griffinia gardneriana and Habranthus
itaobinus bulbs and study the role of caspase-3 as a molecular apoptosis mediator.
Methods:
Methanolic crude extracts of Griffinia gardneriana and Habranthus itaobinus bulbs were submitted to
acid-base extraction to obtain alkaloid-enriched fractions. The obtained fractions were fractionated using chromatographic
techniques leading to isolation and identification of some alkaloids accomplished via HPLC and
1H-NMR, respectively. Molecular docking studies assessed the amount of free binding energy between the isolated
alkaloids with the caspase-3 protein and also calculated the theoretical value of Ki. Studies have also been
developed to evaluate in vitro cytotoxicity and genotoxicity in such alkaloids and apoptosis activation via the
caspase pathway using both tumor and normal cell lines.
Results:
Seven alkaloids were isolated and identified. Among these, 11-hydroxyvittatine and 2-α-7-
dimethoxyhomolycorine were not cytotoxic, whereas tazettine, trisphaeridine, and sanguinine only showed
activity against the fibroblast lineage. Lycorine and pretazettine were 10 to 30 folds more cytotoxic than the
other alkaloids, including cancerous lines, and were genotoxic and capable of promoting apoptosis via the
caspase-3 pathway. This result supports data obtained in docking studies wherein these two compounds exhibited
the highest free energy values.
Conclusion:
The cytotoxicity assay revealed that, among the seven alkaloids isolated, only lycorine and pretazettine
were active against different cell lines, exhibiting concentration- and time-dependent cytotoxic actions
alongside genotoxic action and the ability to induce apoptosis by caspase-3, a result consistent with those obtained
in docking studies.
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Affiliation(s)
- Eduardo R. Cole
- Department of Chemistry, Federal University of Espírito Santo (UFES), Avenida Fernando Ferrari, 514, 29.075-910, Vitória, Espírito Santo, Brazil
| | - Jean P. de Andrade
- Department of Chemistry, Federal University of Espírito Santo (UFES), Avenida Fernando Ferrari, 514, 29.075-910, Vitória, Espírito Santo, Brazil
| | - João F. Allochio Filho
- Department of Chemistry, Federal University of Espírito Santo (UFES), Avenida Fernando Ferrari, 514, 29.075-910, Vitória, Espírito Santo, Brazil
| | - Elisângela F. P. Schmitt
- Pharmaceutical Science Undergraduate Program, Universidade Vila Velha (UVV), Rua José Dantas de Melo, 21, 29.102-770, Vila Velha, Espírito Santo, Brazil
| | - Anderson Alves-Araújo
- Department of Agrarian and Biological Sciences, Federal University of Espírito Santo (UFES), Northern of Espírito Santo University Centre (CEUNES), BR-101 Norte, Km 60, 29932-540, São Mateus, Espírito Santo, Brazil
| | - Jaume Bastida
- Department of Biology, Health and Environment, Faculty of Pharmacy, University of Barcelona (UB), Avenida Diagonal, 643, 08028, Barcelona, Spain
| | - Denise C. Endringer
- Pharmaceutical Science Undergraduate Program, Universidade Vila Velha (UVV), Rua José Dantas de Melo, 21, 29.102-770, Vila Velha, Espírito Santo, Brazil
| | - Warley de S. Borges
- Department of Chemistry, Federal University of Espírito Santo (UFES), Avenida Fernando Ferrari, 514, 29.075-910, Vitória, Espírito Santo, Brazil
| | - Valdemar Lacerda
- Department of Chemistry, Federal University of Espírito Santo (UFES), Avenida Fernando Ferrari, 514, 29.075-910, Vitória, Espírito Santo, Brazil
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Morgan V, Sad C, Constantino A, Azeredo R, Lacerda V, Castro E, Barbosa L. Droplet Size Distribution in Water-Crude Oil Emulsions by Low-Field NMR. J BRAZIL CHEM SOC 2019. [DOI: 10.21577/0103-5053.20190057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Arpini B, Cubides-Román D, Javarini C, de Araújo M, David G, dos Santos R, Romão W, Neto A, Lacerda V. Simple Niobium Catalysts Applied in Reflux and Ultrasound-Assisted Systems for Biofuel Synthesis. J BRAZIL CHEM SOC 2019. [DOI: 10.21577/0103-5053.20190099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Barbosa LR, Souza DS, Queiroz LH, Neto AC, de Lima DP, Beatriz A, Romão W, de Castro EV, Lacerda V. Unequivocal structural assignments of three cardanol derivatives: An experimental and theoretical approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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de A. Leite J, de Oliveira MV, Conti R, de S. Borges W, Rosa TR, Filgueiras PR, Lacerda V, Romão W, Neto ÁC. Extraction and isolation of cannabinoids from marijuana seizures and characterization by 1H NMR allied to chemometric tools. Sci Justice 2018; 58:355-365. [DOI: 10.1016/j.scijus.2018.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 05/28/2018] [Accepted: 06/17/2018] [Indexed: 10/28/2022]
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Constantino AF, Francisco CS, Cubides-Roman DC, Lacerda V. Hetero-Diels-Alder Reactions in the Synthesis of Biologically Active Nitrogen Compounds: A Review. Curr Org Synth 2018. [DOI: 10.2174/1570179414666170517170230] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The Hetero-Diels-Alder reaction (HDAR) is a method extensively used in organic chemistry as a tool in the synthesis of innumerous polycyclic compounds in particular nitrogen compounds, presents in many natural products, medicinally relevant substances and organic materials. The literature describes innumerable studies of HDAR using classic methods and modern developments such as reactions on the solid phase, the use of catalysts, transformations in aqueous solution and under microwaves.
Objective:
This review describes a variety of HDAR focused on obtaining nitrogen-containing compounds of considerable chemical and biological interest, and highlighting reported biological activity.
Conclusion:
This review has shown the importance of the HDA reaction as a tool of organic chemistry in the synthesis of nitrogen compounds. This type of reaction presents important properties including bond-forming economy, high regio- and stereoselectivities and thus provides highly efficient routes to access a wide range of polycyclic compounds. In addition to the variety of nitrogen compounds synthetized successfully by this method, they present relevant biological properties.
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Affiliation(s)
- Andre F. Constantino
- Departamento de Quimica, Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, Campus Goiabeiras, Vitoria, Brazil
| | - Carla S. Francisco
- Departamento de Quimica, Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, Campus Goiabeiras, Vitoria, Brazil
| | - Diana C. Cubides-Roman
- Departamento de Quimica, Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, Campus Goiabeiras, Vitoria, Brazil
| | - Valdemar Lacerda
- Departamento de Quimica, Centro de Ciencias Exatas, Universidade Federal do Espirito Santo, Campus Goiabeiras, Vitoria, Brazil
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Correia RM, Tosato F, Domingos E, Rodrigues RR, Aquino LFM, Filgueiras PR, Lacerda V, Romão W. Portable near infrared spectroscopy applied to quality control of Brazilian coffee. Talanta 2018; 176:59-68. [DOI: 10.1016/j.talanta.2017.08.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/28/2017] [Accepted: 08/02/2017] [Indexed: 10/19/2022]
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28
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dos Santos NA, Souza LM, Domingos E, França HS, Lacerda V, Beatriz A, Vaz BG, Rodrigues RR, Carvalho VV, Merlo BB, Kuster RM, Romão W. Evaluating the selectivity of colorimetric test (Fast Blue BB salt) for the cannabinoids identification in marijuana street samples by UV–Vis, TLC, ESI(+)FT-ICR MS and ESI(+)MS/MS. Forensic Chem 2016. [DOI: 10.1016/j.forc.2016.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Arpini B, Andrade Bartolomeu A, Andrade C, da Silva-Filho L, Lacerda V. Recent Advances in Using Niobium Compounds as Catalysts in Organic Chemistry. Curr Org Synth 2015. [DOI: 10.2174/157017941205150821125817] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gama LA, Merlo BB, Lacerda V, Romão W, Neto AC. No-deuterium proton NMR (No-D NMR): A simple, fast and powerful method for analyses of illegal drugs. Microchem J 2015. [DOI: 10.1016/j.microc.2014.07.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Barbosa LR, Vieira YW, Lacerda V, de Oliveira KT, dos Santos RB, Greco SJ, Neto AC, de Castro EVR, Brocksom TJ. Unequivocal structural assignments of three cycloheptenoid intermediates for guaiane sesquiterpenes: an experimental and theoretical approach. Magn Reson Chem 2014; 52:318-328. [PMID: 24723362 DOI: 10.1002/mrc.4057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 02/07/2014] [Accepted: 02/11/2014] [Indexed: 06/03/2023]
Affiliation(s)
- Layla R Barbosa
- Departamento de Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, 29.075-910, Vitória, ES, Brazil
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Morgan VG, Barbosa LL, Lacerda V, Vinicius Ribeiro de Castro E. Evaluation of the Physicochemical Properties of the Postsalt Crude Oil for Low-Field NMR. Ind Eng Chem Res 2014. [DOI: 10.1021/ie500761v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vinícius G. Morgan
- NMR Laboratory, Center of
Competence in Petroleum Chemistry− NCQP, and Department of Chemistry, Federal University of Espı́rito Santo−UFES, Av. Fernando Ferrari 514, CEP 29075-910 Goiabeiras, Vitória, ES Brazil
| | - Lúcio L. Barbosa
- NMR Laboratory, Center of
Competence in Petroleum Chemistry− NCQP, and Department of Chemistry, Federal University of Espı́rito Santo−UFES, Av. Fernando Ferrari 514, CEP 29075-910 Goiabeiras, Vitória, ES Brazil
| | - Valdemar Lacerda
- NMR Laboratory, Center of
Competence in Petroleum Chemistry− NCQP, and Department of Chemistry, Federal University of Espı́rito Santo−UFES, Av. Fernando Ferrari 514, CEP 29075-910 Goiabeiras, Vitória, ES Brazil
| | - Eustáquio Vinicius Ribeiro de Castro
- NMR Laboratory, Center of
Competence in Petroleum Chemistry− NCQP, and Department of Chemistry, Federal University of Espı́rito Santo−UFES, Av. Fernando Ferrari 514, CEP 29075-910 Goiabeiras, Vitória, ES Brazil
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Silva RC, Carneiro GF, Barbosa LL, Lacerda V, Freitas JCC, de Castro EVR. Studies on crude oil-water biphasic mixtures by low-field NMR. Magn Reson Chem 2012; 50:85-8. [PMID: 22337691 DOI: 10.1002/mrc.2798] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 06/18/2011] [Accepted: 08/09/2011] [Indexed: 05/13/2023]
Abstract
Low-field (1) H NMR was used in this work for the analysis of mixtures involving crude oils and water. CPMG experiments were performed to determine the transverse relaxation time (T2 ) distribution curves, which were computed by the inverse Laplace transform of the echo decay data. The instrument's ability of quantifying water and petroleum in biphasic mixtures following different methodologies was tested. For mixtures between deionized water and petroleum, one achieved excellent results, with root mean squared error of cross-validation (RMSECV) of 0.8% for a regression between the water content (wt %) and the relative area of the water peak in the T2 distribution curve, or a standard deviation of 0.9% for the relationship between the water content and the relative water peak area, corrected by the relative hydrogen index of the crude. In the case of biphasic mixtures of Mn(2+) -doped water and crude oils, the best result of RMSECV = 1.6% was achieved by using the raw magnetization decay data for a partial least squares regression.
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Affiliation(s)
- Renzo C Silva
- LabPetro - Laboratório de Pesquisa e Desenvolvimento de Metodologias para Análise de Petróleos, Departamento de Química, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, 29075-910, Vitória, Espírito Santo, Brazil
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Salles RC, Lacerda V, Barbosa LR, Ito FM, de Lima DP, dos Santos RB, Greco SJ, Neto ÁC, de Castro EV, Beatriz A. GIAO chemical shifts calculations of some polycyclic cage compounds: Unambiguous assignment of NMR signals and stereoisomers. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2011.10.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Queiroz LHK, Lacerda V, dos Santos RB, Greco SJ, Cunha Neto A, de Castro EVR. NMR property calculations and experimental study of the 1,6-epoxycarvone and α-epoxypinene: a comparison of models. Magn Reson Chem 2011; 49:140-146. [PMID: 21322010 DOI: 10.1002/mrc.2722] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Revised: 12/01/2010] [Accepted: 12/03/2010] [Indexed: 05/30/2023]
Abstract
This work aims at using theoretical calculations of shielding tensors (σ) through different methods [gauge-independent atomic orbital (GIAO), continuous set of gauge transformations (CSGT) and individual gauges for atoms in molecules (IGAIM)] and spin-spin coupling constants J using GIAO method to compare these methods and to corroborate the data obtained with the assignment of all of (1)H and (13)C NMR signals and the relative stereochemistry of the 1,6-epoxycarvone and the α-epoxypinene. All the (1)H and (13)C NMR signals were assigned unequivocally. The stereochemistry for the epoxides is trans and the B3LYP theory level with CSGT and IGAIM methods is the best choice to evaluate theoretical chemical shifts for compounds studied.
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36
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Salles RC, Lacerda V, Beatriz A, Ito FM, dos Santos RB, Greco SJ, de Castro EVR, de Lima DP. 1H and 13C NMR spectral data of bioactive cage-like polycyclic compounds. Magn Reson Chem 2010; 48:409-415. [PMID: 20301093 DOI: 10.1002/mrc.2588] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Bioactive cage-like polycyclic compounds have attracted the attention of several research groups because of their unique appearance and their biological activities. Their structures were established on the basis of (1)H NMR and (13)C NMR spectroscopic data. The (1)H and (13)C signal assignments and most homonuclear hydrogen coupling constants were assigned by use of techniques such as 1D (1)H and (13)C NMR and 2D gCOSY, non-edited gHSQC and gHMBC. The gNOESY experiments proved the endo-stereochemistry.
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37
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Lacerda V, da Silva GVJ, Constantino MG, Dos Santos RB, de Castro EVR, Silva RC. Stereochemistry of cyclopentane derivatives from (2,3)J(CH) dependence on dihedral angle (theta H--C--C--X). Magn Reson Chem 2008; 46:268-273. [PMID: 18236435 DOI: 10.1002/mrc.2182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The (2,3)J(CH) dependence on dihedral angle (theta H--C--C--X) for cyclopentane derivatives was investigated. We observed that the combined use of experimentally obtained (2,3)J(CH) values and the theoretically determined dihedral angles between the corresponding nuclei can be used to infer the relative stereochemistry of the ring substituents in cyclopentane derivatives. There is a good correlation between the magnitude of (3)J(CH) and the dihedral angle between the hydrogen and the coupled carbon (R2 = 0.88).
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Affiliation(s)
- Valdemar Lacerda
- Departamento de Química, Centro de Ciências Exatas da Universidade Federal do Espirito Santo, Av. Fernando Ferrari 514, 29060-900, Vitória, ES, Brazil.
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Lacerda V, da Silva GVJ, Constantino MG, Tormena CF, Williamson RT, Marquez BL. Long-range JCH heteronuclear coupling constants in cyclopentane derivatives. Part II. Magn Reson Chem 2007; 45:82-6. [PMID: 17048264 DOI: 10.1002/mrc.1912] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Here we report the detailed measurement of long-range heteronuclear spin-spin coupling constants, especially 2, 3JCH spin-spin couplings for eight different cyclopentane derivatives. These 2, 3JCH constants were shown to be a useful tool in the determination of the relative stereochemistry in these rings. The coupling constant measurements reported here are based on two different experiments: a 2D heteronuclear correlation experiment named G-BIRDR, X-CPMG-HSQMBC and the 2D-coupled gHSQC {1H-13C} experiment
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Affiliation(s)
- Valdemar Lacerda
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 14040-901-Ribeirão Preto-SP, Brazil.
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Lacerda V, da Silva GVJ, Constantino MG, Tormena CF, Williamson RT, Marquez BL. Long-range J(CH) heteronuclear coupling constants in cyclopentane derivatives. Magn Reson Chem 2006; 44:95-8. [PMID: 16281189 DOI: 10.1002/mrc.1723] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Detailed measurements of long-range heteronuclear spin-spin coupling constants, especially (2, 3)J(CH) spin-spin couplings for various cyclopentane derivatives, are reported. The measurements are based on a 2D heteronuclear correlation experiment named G-BIRD(R, X)-CPMG-HSQMBC.
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Affiliation(s)
- Valdemar Lacerda
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 14040-901-Ribeirão Preto-SP, Brazil.
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da Silva R, Pedersoli S, Lacerda V, Donate PM, de Albuquerque S, Bastos JK, de Matos Araújo ALS, Andrade e Silva ML. Complete assignments of 1H and 13C NMR spectral data for benzylidenebenzyl butyrolactone lignans. Magn Reson Chem 2005; 43:966-9. [PMID: 16103991 DOI: 10.1002/mrc.1655] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The structures of three benzylidenebenzyl butyrolactone lignans (gossypifan, carthamogenin, and savinin) have been established on basis of 1H NMR and 13C NMR spectroscopic data. The 1H NMR and 13C NMR spectra of these lignans have been fully assigned by the use of techniques such as gCOSY, non-edited gHSQC, and gHMBC. Complete assignment and most homonuclear hydrogen coupling constant measurements were performed, also providing enough data for the determination of the relative stereochemistry.
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Affiliation(s)
- Rosangela da Silva
- Departamento de Análises Clínicas, Toxológicas e Bromatológicas da Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil.
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Constantino MG, Lacerda V, da Silva GV, Tasic L, Rittner R. Principal component analysis of long-range ‘W’ coupling constants of some cyclic compounds. J Mol Struct 2001. [DOI: 10.1016/s0022-2860(01)00591-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
Glutamate, glutamine, and ammonia pool size have been determined in two S. cerevisiae strains (GOGAT+ and GOGAT-) growing under ammonia excess and limitation at a dilution rate of 0.10/h. The biomass levels and glutamate dehydrogenase NADPH-dependent (NADPH-GDH) activities were also measured for both strains. The strain that lacks GOGAT activity showed lower levels of metabolites under both media and lower levels of biomass under carbon limitation (ammonia excess) compared to the GOGAT+ strain. Under nitrogen limitation, the biomass level was the same for both strains, but GOGAT- changed from rounded to ellipsoidal cells.
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Affiliation(s)
- V Lacerda
- Departamento de Biofisica, CCB UFPE, Cid. Universitaria, Recife, PE-Brazil
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