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Quassinoids from Ailanthus excelsa.

Bipin Chandra Joshi1, Anuj Pandey, Ram Prakash Sharma

  • 1Department of Chemistry, University of Lucknow, Lucknow, 226 007, India.

Phytochemistry
|February 1, 2003
PubMed
Summary

Researchers identified new quassinoids from Ailanthus excelsa stem bark. Glaucarubolone was newly isolated from this plant, with structures confirmed using spectroscopic analysis.

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Area of Science:

  • Phytochemistry
  • Natural Products Chemistry
  • Organic Chemistry

Background:

  • Ailanthus excelsa is a plant species known for its rich phytochemical profile.
  • Quassinoids are a class of compounds with diverse biological activities.
  • Previous studies have identified various quassinoids from Ailanthus species.

Purpose of the Study:

  • To isolate and structurally elucidate quassinoids from the stem bark of Ailanthus excelsa.
  • To identify novel quassinoid compounds from this plant source.
  • To contribute to the understanding of the chemical constituents of Ailanthus excelsa.

Main Methods:

  • Extraction of compounds from Ailanthus excelsa stem bark.
  • Isolation of quassinoid compounds using chromatographic techniques.
  • Structural elucidation of isolated compounds via spectroscopic data analysis (e.g., NMR, MS).

Main Results:

  • Three quassinoids, including 3,4-dihydro excelsin 3, were isolated.
  • Five known quassinoids (excelsin, glaucarubine, ailanthinone, glaucarubinone, glaucarubolone) were identified.
  • Glaucarubolone was reported for the first time in this plant species.

Conclusions:

  • The stem bark of Ailanthus excelsa is a source of diverse quassinoids.
  • The identification of glaucarubolone represents a novel finding for this plant.
  • Spectroscopic analysis is crucial for the structural confirmation of natural products.

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