Structural characterization and dynamic NMR studies of a new peracylated macrocyclic diterpene

Autor:	Judit Hohmann, G. Dombi, Gábor Günther, Tamás Martinek, Andrea Vasas
Rok vydání:	1999
Předmět:	chemistry.chemical_compound chemistry Stereochemistry Internal rotation Molecule General Materials Science Alcohol Spectral analysis General Chemistry Diterpene Characterization (materials science) Dichloromethane
Zdroj:	Magnetic Resonance in Chemistry. 37:365-370
ISSN:	1097-458X 0749-1581
DOI:	10.1002/(sici)1097-458x(199905)37:5<365::aid-mrc461>3.0.co;2-b
Popis:	A heptaester of a new diterpene alcohol was isolated from the dichloromethane extract of the whole plant of Euphorbia esula L. A detailed NMR and mass spectral analysis revealed that its structure is (E)-(2R*, 3R*, 4S*, 5R*, 7S*, 8R*, 9S*, 13R*, 15R*)-2,3,5,8,9-pentaacetoxy-7-isobutanoyloxy-14-oxojatropha-6(17),11-diene. Its conformation was studied in three different solutions. The temperature dependence of the spectral parameters revealed conformational changes through internal rotation of the macrocycle part of the molecule. Copyright © 1999 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
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