Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16

Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16

Phytochemical investigation of the leaves and branches of a specimen of Ouratea semiserrata led to the isolation and characterization of ent-16alpha,17-dihydroxykauran-19-oic acid, along with other natural products. This diterpenoid and its derivatives were used to unambiguous ¹H and 13C chemical sh...

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Bibliographic Details
Main Authors: Velandia Javier Rincón, Carvalho Mário Geraldo de, Braz-Filho Raimundo
Format: Article
Language:English
Published: Sociedade Brasileira de Química 1998-01-01
Series:Química Nova
Subjects:
Ouratea semiserrata
Ochnaceae
ent-16alpha,17-dihydroxykauran-19-oic acid
¹H and 13C spectral data
HRMS spectra
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400004
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spelling doaj-0b27781fb4734194807a282f05a996702020-11-24T23:24:48ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70641998-01-01214397404Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16Velandia Javier RincónCarvalho Mário Geraldo deBraz-Filho RaimundoPhytochemical investigation of the leaves and branches of a specimen of Ouratea semiserrata led to the isolation and characterization of ent-16alpha,17-dihydroxykauran-19-oic acid, along with other natural products. This diterpenoid and its derivatives were used to unambiguous ¹H and 13C chemical shifts assignments and to indicate some mistake data described in the literature as consequence mainly of the stereochemicals of the chiral carbons C-4 and C-16. The HRMS spectra were also analysed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400004Ouratea semiserrataOchnaceaeent-16alpha,17-dihydroxykauran-19-oic acid¹H and 13C spectral dataHRMS spectra
collection DOAJ
language English
format Article
sources DOAJ
author Velandia Javier Rincón
Carvalho Mário Geraldo de
Braz-Filho Raimundo
spellingShingle Velandia Javier Rincón
Carvalho Mário Geraldo de
Braz-Filho Raimundo
Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
Química Nova
Ouratea semiserrata
Ochnaceae
ent-16alpha,17-dihydroxykauran-19-oic acid
¹H and 13C spectral data
HRMS spectra
author_facet Velandia Javier Rincón
Carvalho Mário Geraldo de
Braz-Filho Raimundo
author_sort Velandia Javier Rincón
title Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
title_short Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
title_full Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
title_fullStr Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
title_full_unstemmed Ácido ent-16a,17-diidroxicauran-19-óico isolado de Ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais C-4 e C-16
title_sort ácido ent-16a,17-diidroxicauran-19-óico isolado de ouratea semiserrata e os desafios estereoquímicos dos carbonos quirais c-4 e c-16
publisher Sociedade Brasileira de Química
series Química Nova
issn 0100-4042
1678-7064
publishDate 1998-01-01
description Phytochemical investigation of the leaves and branches of a specimen of Ouratea semiserrata led to the isolation and characterization of ent-16alpha,17-dihydroxykauran-19-oic acid, along with other natural products. This diterpenoid and its derivatives were used to unambiguous ¹H and 13C chemical shifts assignments and to indicate some mistake data described in the literature as consequence mainly of the stereochemicals of the chiral carbons C-4 and C-16. The HRMS spectra were also analysed.
topic Ouratea semiserrata
Ochnaceae
ent-16alpha,17-dihydroxykauran-19-oic acid
¹H and 13C spectral data
HRMS spectra
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000400004
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AT carvalhomariogeraldode acidoent16a17diidroxicauran19oicoisoladodeourateasemiserrataeosdesafiosestereoquimicosdoscarbonosquiraisc4ec16
AT brazfilhoraimundo acidoent16a17diidroxicauran19oicoisoladodeourateasemiserrataeosdesafiosestereoquimicosdoscarbonosquiraisc4ec16
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