A sesquiterpene dimer from Xylopia aromatica

Dirceu Martins, Eliane Osshiro, Nidia F. Roque, Vered Marks, Hugo E. Gottlieb

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31 Scopus citations

Abstract

A new guaiane dimer has been isolated from the leaves of Xylopia aromatica. The natural product, whose IUPAC name is [11α,12β,13α,21β]-7- hydroxy-16-oxo-17-isopropylidene-1α,5,5,9β,14α,20-hexamethyl-6- oxaheptacyclo[10.9.1.02.10.04.7.012.21.013.19]docosa- 2(10),3,19-triene, seems to have been formed by cycloaddition of two cyclopentadiene precursors, and contains an unusual hemiacetal oxetane ring. The structure was elucidated mainly by 1D and 2D NMR techniques; NOESY spectra were instrumental in the determination of stereochemistry.

Original languageEnglish
Pages (from-to)677-680
Number of pages4
JournalPhytochemistry
Volume48
Issue number4
DOIs
StatePublished - Jun 1998

Bibliographical note

Funding Information:
Acknowledgements-The authors are grateful to the Funda#o de Amporo & Pesquisa do Estado de S%o Paula for financial support and to the Conselha National de Pesquisa e Desenvolvimento Gentifico e Tecnol6gico for fellowships to D.M., E.0 and N.F.R.

Keywords

  • Annonaceae
  • Sesquiterpene dimer
  • Xylopia aromatica

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