Friedelane and oleanane triterpenoids from bark wood ofAustroplenckia populnea

Sousa, J.R. de; Silva, Grácia D. F.; Pedersoli, Jose ́L.; Alves, Ricardo José

doi:10.1016/0031-9422(90)80195-m

Cited by 30 publications

(14 citation statements)

References 3 publications

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“…The analyses by thin layer chromatography (TLC) and by gas chromatography coupled with mass spectrometry (GC-MS) indicated friedelin and β-friedelinol as the mainly constituents of LHE, pentacyclic triterpenes also encountered in other Maytenus species. By IR, 1 H and 13 C NMR spectral data was possible to identify DCT as dulcitol (galactitol), a polyol commonly encountered in different species of the Celastraceae family (Sousa et al, 1990).…”

Section: Extraction and Isolation Proceduresmentioning

confidence: 99%

Antioxidant activity of Maytenus imbricata Mart., Celastraceae

Silva¹,

Silva²,

Barbosa³

et al. 2009

Rev. bras. farmacogn.

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RESUMO: "Atividade antioxidante de Maytenus imbricata Mart., Celastraceae". A atividade antioxidante, poder redutor (RP) e a atividade coletora de radicais livres (FRS) usando 2,2-difenil-1-picrilhidrazil (DPPH), e a concentração de substâncias fenólicas totais dos extratos e substâncias isoladas das folhas, caules e raízes de Maytenus imbricata Mart. (Celastraceae) foram avaliados. Alguns extratos, a mistura de compostos fenólicos e epicatequina mostraram alto poder redutor e atividade antioxidante (DPPH) em comparação com o padrão butilhidroxianisol (BHA) e ácido gálhico (GA) utilizados no ensaio. O extrato acetato de etila das folhas mosraram alto teor de substâncias fenólicas e alto poder redutor e atividade antioxidante em relação aos outros extratos. Este fato indica haver alguma relação entre a concentração de substâncias fenólicas e o poder redutor. O solvente usado no processo de extração influencia a composição química dos extratos e, consequentemente, as atividades redutoras e antioxidantes.Unitermos: Atividade antioxidante, poder redutor, Maytenus imbricata, Celastraceae. ABSTRACT:The free radical scavenging activity (FRS) using 2,2-diphenyl-1-picrylhydrazyl (DPPH), the reducer power and the total phenolic concentration of extracts and compounds isolated from leaves, branches and roots of Maytenus imbricata Mart. (Celastraceae) were evaluated. Some extracts, a mixture of phenolic compounds (MPC) and epicatechin showed higher RP and FRS (DPPH) activities in comparison with the standard butylhydroxyanisole (BHA) and galic acid (GA) used in assays. The ethyl acetate extract from leaves showed higher total phenolic content and also higher RP and FRS (DPPH) than the other extracts. These facts indicate that there are some relations between phenolic concentration in the extract and the antioxidant activity and the reducer power. The solvent used in the extraction process influences the chemical composition of the extracts and consequently its antioxidant and reducer power activities.

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Section: Extraction and Isolation Proceduresmentioning

confidence: 99%

Antioxidant activity of Maytenus imbricata Mart., Celastraceae

Silva¹,

Silva²,

Barbosa³

et al. 2009

Rev. bras. farmacogn.

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“…206 During the study of the saponins of Oxytropis glabra, a new aglycone, oxytrogenol (250), was The I1,13( 18)-diene (251) has been found in Glycyrrhiza echinata roots"* and the 1 1,13( 18)-dienes glyyunnansapogenins C (252) and E (253) are constituents of G. y u n n a n e n s i~.~~~ Katononic acid (254) has been reported from Austroplenckia populnea. 210 The 3,4-seco derivative (255) has been isolated from Dacryodes normandiF and the 3,4-seco derivatives dihydronyctanthic acid (256) and its methyl ester have been found in Hoya naumanii. 169 Crystal structure of tomentosic acid (257) from Terminalia bellerica212 and gypsogenic acid acetate (258) from Opilia celtidifoli~~~~ have been published.…”

Section: The Oleanane Groupmentioning

confidence: 99%

Triterpenoids

CONNOLLY¹,

Hill²,

Ngadjui³

1994

Nat. Prod. Rep.

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“…In previous papers we described the chemical constitution of the root bark 2 , bark wood 3 and root wood 4 of Austroplenckia populnea (Reiss) Lundell, specimen of the Celastraceae family. The plant is popularly known in the state of Minas Gerais as ''mangabeira-brava'', and it is a source of material for the industry of vimen furniture.…”

Section: Introductionmentioning

confidence: 99%

3-Epiabruslactone A, a New Triterpene Lactone Isolated from Austroplenckia populnea

Silva¹,

Duarte²,

Paes³

et al. 1998

J. Braz. Chem. Soc.

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Um triterpeno lactônico inédito isolado do cerne de Austroplenckia populnea (Celastraceae) foi caracterizado como 3α-hidroxiolean-12-en-29,22α-olídeo (a γ-lactona do ácido 3α,22α-diidroxiolean-12-en-29α-óico), o epímero em C-3 da abruslactona A, com base em dados espectrais, oxidação e análise cristalográfica.A new lactonic triterpene isolated from the heartwood of Austroplenckia populnea (Celastraceae) was characterized as 3α-hydroxyolean-12-en-29,22α-olide (the γ-lactone of the 3α,22α-dihydroxyolean-12-en-29α-oic acid), the 3-epimer of the abruslactone A, on the basis of its spectral data, chemical transformations, and single crystal X-ray analysis.

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Friedelane and oleanane triterpenoids from bark wood ofAustroplenckia populnea

Cited by 30 publications

References 3 publications

Antioxidant activity of Maytenus imbricata Mart., Celastraceae

Antioxidant activity of Maytenus imbricata Mart., Celastraceae

Triterpenoids

3-Epiabruslactone A, a New Triterpene Lactone Isolated from Austroplenckia populnea

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