Indole Derivatives
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Volatile Constituents of Floral Scents from Encyclia cordigera (Kunth) Dressler and E. randii (Barb. Rodr.) Porto & Brade (Orchidaceae)
Encyclia cordigera is native from Central America tropical region, and Encyclia randii occurs at Brazilian Amazon environment domains. Floral concentrates from both Encyclia species were extracted, analyzed by gas chromatography-mass spectrometry, and identified compounds belong to terpenoids, phenylpropanoids, and fatty acid derivatives classes. Primary con
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Synthesis and Biological Evaluation of Benzo[f]indole-4,9-diones N-Linked to Carbohydrate Chains as New Type of Antitumor Agents
In this work, we report the synthesis of three series of carbohydrate-based benzo[f]indole-4,9-diones and amino-1,4-naphthoquinone derivatives and evaluated their cytotoxic activity against eight human cancer cell lines. Several compounds showed a promising cytotoxic activity toward the tumor cell lines (half maximal inhibitory concentration (IC50) < 10.0 μ
J. Braz. Chem. Soc.. Publicado em: 2021-03
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3. Phytotoxins eliminated by milk: a review
RESUMO: O leite é uma mistura complexa de lipídeos suspensos em solução aquosa de proteínas e pode ser veículo de diversos contaminantes, mas, geralmente, não é uma importante via de excreção de tóxicos. O principal problema é a exposição repetida, como ocorre com a ingestão de plantas tóxicas, e seu potencial perigo para os animais que conso
Pesq. Vet. Bras.. Publicado em: 02/05/2019
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4. Acetylcholinesterase inhibition and antimicrobial activity of hydroxyl amides synthesized from natural products derivatives
ABSTRACT Thirteen natural products derivatives of hydroxyl amide class, three described for the first time, were synthesized by reaction of three indole acids and 3,4,5-trimethoxybenzoic acid with six different amino alcohols in the presence of triphenylphosphine and N-bromosuccinimide. The derivatives were tested against the Gram (+) bacteria Staphylococcus
An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018
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5. Rhodium(III)-Catalyzed Addition of Indoles with Boc-Imines via C-H Bond Activation
A rhodium-catalyzed alkylation reaction of indoles with N-Boc-imines has been developed via C-H activation to afford a series of substituted 2-indolyl-methanamine derivatives with good functional group tolerance and regioselectivity. A wide range of indole-based alkylation products could be obtained in up to 95% yield.
J. Braz. Chem. Soc.. Publicado em: 2018-06
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6. Bioactive Indole Alkaloids from Croton echioides
Bioguided fractionation of a hydroethanolic extract from the stem bark of Croton echioides Baill. led to isolation of the new indole alkaloid N-trans-feruloyl-3,5-dihydroxyindolin-2-one as a stereoisomeric mixture and the known alkaloids N-trans-p-coumaroyl-tryptamine, N-trans-p-coumaroyl-5-hydroxytryptamine, N-trans-4-methoxy-cinnamoyl-5-hydroxytryptamine,
J. Braz. Chem. Soc.. Publicado em: 2016-12
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7. Design, Synthesis, Pharmacological Evaluation and Molecular Docking Studies of Substituted Oxadiazolyl-2-Oxoindolinylidene Propane Hydrazide Derivatives
The manuscript describes design and synthesis of novel oxadiazolyl-2-oxoindolinylidene propane hydrazides as amide tethered hybrids of indole and oxadiazole and their evaluation for anti-inflammatory and analgesic activity. The compounds were synthesized following five step reaction to yield fifteen derivatives as 3-(5-substituted-1,3,4-oxadiazol-2-yl)-N'-[2
J. Braz. Chem. Soc.. Publicado em: 2016-11
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8. ANION-BINDING AND SENSING PROPERTIES OF NOVEL RECEPTORS BASED ON N-(INDOL-3-YLGLYOXYLYL)BENZYLAMINE
Indole-based receptors such as biindole, carbazole, and indolocarbazole are regarded as some of the most favorable anion receptors in molecular recognition. This is because indole groups possess N–H groups as hydrogen-bonding donors. The introduction of amide groups in the indole framework can induce strong binding properties and good water solubility. In
Quím. Nova. Publicado em: 2015-12
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9. ESTUDO DO EFEITO DE SUBSTITUINTES NA FOTOQUÍMICA DE TIOXANTONA POR FOTÓLISE POR PULSO DE LASER EM NANOSSEGUNDO / STUDY OF THE EFFECT OF substituents on the photochemical Thioxanthone flash photolysis BY LASER IN nanosecond
By laser flash photolysis, the photo-reactivity of the triplet excited state of thioxanthone derivatives (2BTX, 2MeOTX, 2PrOTX and 2MeTX) was studied. The maximum wavelength and triplet time life of theirs transients are solvent dependents, a blue-shift is observed with the change of no polar to polar middle and still more in hydroxyl solvent. The triplet sp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2010
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10. Viscometric investigations and molecular interactions of some derivatives of 5-substituted indole dihydropyrimidines in mixed organic solvents
Colloid chemical behavior of indole dihydropyrimidines in non-aqueous solvent mixture benzene-methanol of varying composition has been investigated by viscometric measurements at 303K± 0.1. The viscosity of the system increases with the increase in concentration. The Trend Change Point (TCP) values have been determined by intersection of two straight lines,
Eclética Química. Publicado em: 2010
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11. Obtenção do alcalóide indólico bufotenina de sementes de Anadenanthera sp (Fabaceae: Mimosideae) do bioma Cerrado e sua utilização para síntese de substâncias bioativas / Obtenção do alcalóide indólico bufotenina de sementes de Anadenanthera sp (Fabaceae: Mimosideae) do bioma Cerrado e sua utilização para síntese de substâncias bioativas
The biome Brazilian Cerrado (Savannah) has a variety of plant species rich in organic chemicals of interest, especially alkaloids, found at different levels in the leaves, fruits, stems, roots and seeds. The current study focused on the phytochemistry of the Anadenanthera (Leguminosae: Mimosoideae), a perennial tree widespread in the Brazilian Cerrado, popul
Publicado em: 2008
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12. Indole ring oxidation by activated leukocytes prevents the production of hypochlorous acid
Hypochlorous acid (HOCl) released by activated leukocytes has been implicated in the tissue damage that characterizes chronic inflammatory diseases. In this investigation, 14 indole derivatives, including metabolites such as melatonin, tryptophan and indole-3-acetic acid, were screened for their ability to inhibit the generation of this endogenous oxidant by
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-11