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

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Abstract

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.

Original languageEnglish
Pages (from-to)365-370
Number of pages6
JournalMagnetic Resonance in Chemistry
Volume37
Issue number5
Publication statusPublished - May 1 1999

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Keywords

  • Conformational study
  • Diterpenoids
  • Energetic calculation
  • NMR

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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