Ácido ent-16alfa,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
Published in:Química Nova
Main Authors: Javier Rincón Velandia, Mário Geraldo de Carvalho, Raimundo Braz-Filho
Format: Article
Language:English
Published: Sociedade Brasileira de Química 1998-07-01
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&lng=en&tlng=en
Description
Summary: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.
ISSN:1678-7064

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