Amides
Mostrando 25-36 de 178 artigos, teses e dissertações.
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25. Occurrence, biological activities and 13C NMR data of amides from Piper (Piperaceae)
This manuscript describes an update review with up to 285 references concerning the occurrence of amides from a variety of species of the genus Piper (Piperaceae). Besides addressing occurrence, this review also describes the biological activities attributed to extracts and pure compounds, a compiled 13C NMR data set, the main correlations between structural
Quím. Nova. Publicado em: 2012
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26. Resolução do ibuprofeno: um projeto para disciplina de química orgânica experimental
A practical and didactic sequence of experiments was proposed to illustrate the stereochemistry concept, optically active compounds, resolution of racemates, and use of the NMR technique, including 2D-COSY for identification of organic compounds, on a laboratory course for undergraduate students. The sequence was: extractions of racemic ibuprofen and chiral
Quím. Nova. Publicado em: 2012
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27. Chemical constituents from red algae Bostrychia radicans (Rhodomelaceae): new amides and phenolic compounds
This study describes the isolation and structural determination of two amides, isolated for the first time: N,4-dihydroxy-N-(2'-hydroxyethyl)-benzamide (0.019%) and N,4-dihydroxy-N-(2'-hydroxyethyl)-benzeneacetamide (0.023%). These amides, produced by the red macroalgae Bostrychia radicans, had their structures assigned by NMR spectral data and MS analyses.
Quím. Nova. Publicado em: 2012
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28. Novas N-benzoiltiraminas de Swinglea glutinosa (Rutaceae)
Phytochemical studies of the leaves and fruits have led to the identification of the known amides (E)-N-methyl-cinnamamide, N-benzoyltyramine, N-benzoyl-O-geranyltyramine, N-benzoyl-O-(4-acetoxyl)-geranyltyramine, in addition to the new N-{2-[4-(butoxyl-3-one)phenyl]ethyl}benzamide, N-{2-[4-(2,3-dihydroxy-2-methyl-butoxylanal)phenyl]ethyl}benzamide, N-{2-[4-
Quím. Nova. Publicado em: 2012
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29. The combined action of phytolarvicides for the control of dengue fever vector, Aedes aegypti
Amongst other botanical sources, Annona muricata L., Annonaceae, seeds and Piper nigrum L., Piperaceae, fruits are particularly enriched with acetogenins and piperine-related amides, respectively. These crude ethanolic extracts are potent Aedes aegypti bioactives that can kill Aedes aegypti larvae (dengue fever mosquito). A. muricata displayed a 93.48 µg/mL
Revista Brasileira de Farmacognosia. Publicado em: 2012
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30. Análise conformacional e das interações eletrônicas de algumas N-metóxi-N-metil-acetamidas-α-heterossubstituídas / Conformational analysis and electronic interactions of some N-methoxy-N-methyamides α-heterossubstituted
This thesis deals with the synthesis and conformational analysis of some α-heterosubstituted N-methoxy-N-methyl-amides (Weinreb amides) Z-C(O)-N(OMe)Me (Z= CH2F (1), CH2OMe (2), CH2OPh (3), CH2Cl (4), CH2Br (5), CH2SEt (6) and Me2CSEt (7). The analysis of the carbonyl band in the IR spectra supported by B3LYP/6 311++G(3df, 3pd calculations along with th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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31. Microwave-assisted clean synthesis of amides via aza-wittig reaction under solvent-free condition
O acoplamento de fosfazenos com cloretos de acila ou anidridos carboxílicos mediado por microondas na presença de fosfito de etila foi realizado, resultando nas correspondentes amidas, de maneira limpa e com bons rendimentos. Ao contrário das metodologias anteriores, que empregam solventes clorados, benzeno (cancerígeno), etc, este protocolo é eco-amig�
Journal of the Brazilian Chemical Society. Publicado em: 2011-11
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32. DBU as a catalyst for the synthesis of amides via aminolysis of methyl esters
Benzoato de metila e p-clorofenil acetato de metila reagem com benzilamina e pirrolidina levando às correspondentes amidas. Estas reações são mais rápidas na presença de 20 mol% de DBU, fornecendo os produtos com rendimentos levemente superiores. Quando um diéster derivado do ácido L-aspártico foi usado como substrato, a reação com benzilamina e p
Journal of the Brazilian Chemical Society. Publicado em: 2011-11
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33. Three new amides from Streptomyces sp. H7372
As amidas fenatato de metila (1), actifenamida (2) e 1-β-D-glucopiranosídeo-actinofenol (3), juntamente com outros 13 compostos de estruturas conhecidas, foram isolados do extrato de uma cultura de Streptomyces sp H7372. As estruturas destes compostos foram determinadas por análises de RMN uni e bidimensionais e por espectrometria de massas. Cicloheximida
Journal of the Brazilian Chemical Society. Publicado em: 2011-02
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34. Synthesis and biological activity of n-{5-(4-methylphenyl) diazenyl-4-phenyl-1, 3-thiazol-2-yl}benzamide derivatives
In the present study, various amides of 2-amino-5-(4-methylphenyl)-diazenyl-4-phenyl-1, 3-thiazole was synthesized and their biological activities were evaluated. All the synthesized compounds were characterized by the combination of elemental analysis and standard spectroscopic methods. They are screened for anti-bacterial activity against Escherichia coli
Química Nova. Publicado em: 2011
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35. Efeito da adicao de hidroretentores de agua em Argissolo Amarelo Eutrofico.
Estudou-se o eleito da absorcao de agua proporcionada por tres hidroretentores utilizados em duas concentracoes, em um solo do tipo Argissolo Amarelo Eutrofico, sobre a germinacao e emergencia de plantulas de milho (Zea mays, L.) variedade Assum Preto. Os tratamentos utilizados foram: TO = Solo (Testemunha); T1 = Amido retrogradado + Solo; T2 = Acetato de ce
SIMPOSIO BRASILEIRO DE CAPTACAO DE AGUA DE CHUVA NO SEMI-ARIDO. Publicado em: 2011
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36. Síntese, caracterização e polimerização de bis(metacrilamida)s
The aim of this study was the synthesis, characterization and investigation of kinetic behavior of photo- and thermal polymerization of 4,4-diphenylmethane-bis(methacrylamide) (BisFenil), N,N¿,hexamethylene-bis(methacrylamide) (BisHexa), N,N¿-decamethylene-bis(methacrylamide) (BisDeca) and N,N¿-dodecamethylene-bis(methacrylamide) (BisDodeca). Methacrylate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011