NMR assignments and X-ray diffraction spectra for two unusual kaurene diterpenes from Erythroxylum barbatum

NMR assignments and X-ray diffraction spectra for two unusual kaurene diterpenes from Erythroxylum barbatum

Copyright (c) 2005 John Wiley & Sons, Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Magnetic resonance in chemistry : MRC. - 1985. - 43(2005), 12 vom: 19. Dez., Seite 1012-5
1. Verfasser: dos Santos, Claudio Costa (VerfasserIn)
Weitere Verfasser: Sousa Lima, Mary Anne, Braz-Filho, Raimundo, de Simone, Carlos Alberto, Silveira, Edilberto Rocha
Format: Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Magnetic resonance in chemistry : MRC
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Diterpenes, Kaurane kaurene 34424-57-2
Beschreibung
Zusammenfassung:Copyright (c) 2005 John Wiley & Sons, Ltd.
The structural characterization of two new, unusual kaurene diterpenes isolated from roots of Erythroxylum barbatum is described. 1D NMR and several 2D shift-correlated NMR pulse sequences (1H,1H-COSY, HMQC, HMBC and NOESY) were used for structure elucidation and the unambiguous 1H and 13C chemical shifts assignments. Single crystal X-ray diffraction analysis was also used to confirm the final relative configuration of the compounds possessing the C-20 methyl and the CH2-15 methylene groups in cis-orientation
Beschreibung:Date Completed 28.02.2006
Date Revised 15.11.2006
published: Print
Citation Status MEDLINE
ISSN:1097-458X