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Related Experiment Videos

Bioactive amides from Glycosmis species

H Greger1, G Zechner, O Hofer

  • 1Comparative Phytochemistry Department, Institute of Botany, University of Vienna, Wien, Austria.

Journal of Natural Products
|December 1, 1996
PubMed
Summary

Six novel phenethyl/styrylamine amides from Glycosmis species show significant antifungal and insecticidal properties. These compounds, including methylthiocarbonic and isovaleric acid derivatives, offer potential for developing new biopesticides.

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Area of Science:

  • Natural Product Chemistry
  • Phytochemistry
  • Medicinal Chemistry

Background:

  • Glycosmis species are known sources of bioactive compounds.
  • Phenethyl/styrylamine amides represent a class of natural products with diverse biological activities.
  • Lipophilic extracts of plants are often rich in secondary metabolites.

Purpose of the Study:

  • To isolate and characterize new phenethyl/styrylamine-derived amides from Glycosmis species.
  • To evaluate the antifungal and insecticidal activities of the isolated compounds.
  • To identify potential new biopesticides from natural sources.

Main Methods:

  • Extraction of lipophilic compounds from Glycosmis cf. mauritiana, Glycosmis cf. cyanocarpa, and Glycosmis crassifolia leaves.
  • Isolation and purification of amide compounds using chromatographic techniques.

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  • Bioassays to determine antifungal activity against Cladosporium herbarum and insecticidal activity against Spodoptera littoralis.

    • Main Results:

    • Six new phenethyl/styrylamine-derived amides were isolated and characterized.
    • The known imide ritigalin (9) was also identified.
    • Compounds 1-6 exhibited pronounced antifungal and/or insecticidal activities.
    • Specific compounds were identified as methylthiocarbonic acid derivatives (niranin, dehydroniranin A, dehydroniranin B) and isovaleric/senecioic acid derivatives (thalebanin B, dehydrothalebanin B, dehydrothalebanin A).

    Conclusions:

    • The lipophilic leaf extracts of Glycosmis species contain novel bioactive amides.
    • These compounds demonstrate significant potential as natural antifungal and insecticidal agents.
    • The identified compounds could serve as leads for the development of new, environmentally friendly pesticides.