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Lignans and polyacetylenes from bupleurum acutifolium

Barrero1, Herrador, Akssira

  • 1Instituto de Biotecnologia, Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain, and Laboratoire de Chemie Bioorganique et Analytique, Faculte des Sciences et Technique.

Journal of Natural Products
|July 30, 1999
PubMed
Summary

Researchers identified six new compounds, including lignans and polyacetylenes, from the aerial parts of Bupleurum acutifolium Boiss. These natural products were isolated and structurally characterized using advanced spectroscopic methods.

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Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Bupleurum species are known for their diverse phytochemical profiles.
  • Natural products serve as a valuable source for drug discovery and chemical biology.

Purpose of the Study:

  • To isolate and characterize novel chemical constituents from Bupleurum acutifolium.
  • To contribute to the understanding of the chemical diversity within the Bupleurum genus.

Main Methods:

  • Hexane extraction of aerial parts of Bupleurum acutifolium.
  • Isolation of compounds using chromatographic techniques.
  • Structure elucidation using Nuclear Magnetic Resonance (NMR) and Mass Spectrometry (MS) analyses.

Main Results:

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  • Identification of two new lignans: (R,Z)-3-(3,4-dimethoxybenzyl)-2-(3, 4-dimethoxybenzylidene)-gamma-butyrolactone (1) and (2R, 3S)-2-acetoxy-2,3-bis(3,4-dimethoxybenzyl)-gamma-butyrolactone (2).
  • Isolation of four new polyacetylenes: (2Z,8E,10E)-heptadeca-2,8,10-triene-4, 6-diyn-1-ol (3), (2E,9Z)-octadeca-2,9-diene-4,6-diyne-1,18-diol (4), (2E,9Z)-18-hydroxy-octadeca-2,9-diene-4,6-diyn-1-yl acetate (5), and (2E,9Z)-1-hydroxy-octadeca-2,9-diene-4,6-diyn-18-yl acetate (6).
  • Comprehensive structural determination of all isolated compounds via NMR and MS.

Conclusions:

  • The hexane extract of Bupleurum acutifolium yielded six previously undescribed compounds.
  • The study expands the known chemical repertoire of Bupleurum species, highlighting its potential for discovering novel bioactive molecules.