Epikatonic acid from Austroplenckia populnea : structure elucidation by nmr spectroscopy and x-ray crystallography.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSilva, Grácia Divina de Fátima-
Autor(es): dc.creatorDuarte, Lucienir Pains-
Autor(es): dc.creatorViera Filho, Sidney Augusto-
Autor(es): dc.creatorDoriguetto, Antônio Carlos-
Autor(es): dc.creatorMascarenhas, Yvone Primerano-
Data de aceite: dc.date.accessioned2025-08-21T15:22:54Z-
Data de disponibilização: dc.date.available2025-08-21T15:22:54Z-
Data de envio: dc.date.issued2017-04-06-
Data de envio: dc.date.issued2017-04-06-
Data de envio: dc.date.issued2002-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/7564-
Fonte completa do material: dc.identifierhttps://onlinelibrary.wiley.com/doi/abs/10.1002/mrc.1009-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1012612-
Descrição: dc.descriptionFrom the chloroform extract of Austroplenckia populnea, epikatonic acid, friedelin, populnonic acid, abruslactone A, salaspermic acid and 22b-epi-maytenfolic acid were isolated. The structure and stereochemistry of epikatonic acid were established by two-dimensional NMR spectroscopic techniques (HMQC, HMBC and NOESY) and later confirmed by single crystal X-ray diffraction as 3b-hydroxyolean- 12-en-29-oic acid, which unambiguously established the configuration of the hydroxyl group at C-3 as 3b-OH and the carboxyl group at C-20 as 20a-COOH. The crystal structure shows two independent molecules in the asymmetric unit. The crystal packing is stabilized by four O–H· · ·O intermolecular hydrogen bonds, which give rise to infinite double chains along the c axis.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectCelastraceae-
Palavras-chave: dc.subjectTriterpene-
Palavras-chave: dc.subjectTriterpenoids-
Título: dc.titleEpikatonic acid from Austroplenckia populnea : structure elucidation by nmr spectroscopy and x-ray crystallography.-
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