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Related Experiment Videos

Lasonolide A: structural revision and total synthesis.

Ho Young Song1, Jung Min Joo, Jung Won Kang

  • 1School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea.

The Journal of Organic Chemistry
|October 11, 2003
PubMed
Summary
This summary is machine-generated.

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Researchers synthesized lasonolide A, initially proposing an incorrect structure. A revised structure with specific double bond configurations was then synthesized, and the (-)-isomer demonstrated biological activity.

Area of Science:

  • Organic Chemistry
  • Natural Product Synthesis
  • Medicinal Chemistry

Background:

  • Lasonolide A is a marine natural product with potential biological activities.
  • Previous synthetic efforts proposed a structure that did not fully align with experimental data.
  • Clarifying the correct structure and stereochemistry is crucial for understanding its biological function.

Purpose of the Study:

  • To synthesize and confirm the structure of lasonolide A.
  • To investigate the biological activity of different lasonolide A enantiomers.
  • To establish a reliable synthetic route for potential pharmaceutical development.

Main Methods:

  • Radical cyclization reactions of beta-alkoxyacrylates were employed for constructing key tetrahydropyranyl units.

Related Experiment Videos

  • Stereoselective synthesis was utilized to prepare both enantiomers of the revised lasonolide A structure.
  • Spectroscopic data (NMR, MS) were used to characterize the synthesized compounds and compare them with the natural product.

    • Main Results:

    • The initially proposed structure of lasonolide A was found to be incorrect based on spectroscopic analysis.
    • A revised structure featuring 17E,25Z double bonds was successfully synthesized.
    • The (-)-enantiomer of the revised lasonolide A structure was identified as the biologically active form.

    Conclusions:

    • The correct structure of lasonolide A has been established through total synthesis.
    • The (-)-enantiomer is responsible for the observed biological activity, guiding future drug discovery efforts.
    • The developed synthetic methodology provides a foundation for accessing related marine natural products.