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Complete assignment of the 1 H and 13 C NMR spectra of four triterpenes of the ursane, artane, lupane and friedelane groups
Author(s) -
Alves Josinete S.,
de Castro Janiza C. M.,
Freire Maisa O.,
daCunha Emidio V. Leitão,
BarbosaFilho José Maria,
de Silva Marcelo Sobral
Publication year - 2000
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(200003)38:3<201::aid-mrc622>3.0.co;2-0
Subject(s) - chemistry , dept , terpene , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , triterpene , nmr spectra database , carbon 13 nmr , spectral line , medicine , physics , alternative medicine , pathology , astronomy
The detailed 1 H and 13 C NMR assignments of the four known triterpenes 3β‐hydroxyurs‐12‐en‐28‐oic acid, 3‐oxo‐24‐methylenecycloartan, 3‐oxo‐11α‐hydroxy‐20(29)lupen and 29‐hydroxyfriedelin, isolated from three Brazilian plants, were achieved by 1D and 2D techniques such as DEPT, HETCOR, HMQC, HMBC, COSY and NOESY. Copyright © 2000 John Wiley & Sons, Ltd.