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Related Experiment Videos

Absolute stereochemistry of amphidinolide E.

Takaaki Kubota1, Masashi Tsuda, Jun'ichi Kobayashi

  • 1Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.

The Journal of Organic Chemistry
|March 2, 2002
PubMed
Summary

Researchers determined the absolute configurations of amphidinolide E, a cytotoxic macrolide from marine dinoflagellates. This discovery aids in understanding its chemical structure and potential biological activity.

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Area of Science:

  • Marine natural products chemistry
  • Organic chemistry
  • Chemical biology

Background:

  • Amphidinolide E is a 19-membered macrolide isolated from the marine dinoflagellate Amphidinium sp.
  • This compound exhibits cytotoxic properties, suggesting potential pharmaceutical applications.
  • Elucidating the stereochemistry of complex natural products is crucial for understanding their biological activity and for synthetic efforts.

Purpose of the Study:

  • To determine the absolute configurations of all eight chiral centers in amphidinolide E.
  • To provide a complete stereochemical assignment for amphidinolide E.
  • To facilitate further research into the structure-activity relationships of amphidinolide E.

Main Methods:

  • Detailed analysis of Nuclear Magnetic Resonance (NMR) data.

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  • Application of chemical degradation and derivatization methods.
  • Spectroscopic analysis to confirm structural features.

    • Main Results:

    • The absolute configurations of eight chiral centers in amphidinolide E were definitively assigned.
    • The determined configurations are 2R, 7R, 8R, 13S, 16S, 17R, 18R, and 19R.
    • This stereochemical assignment provides a complete structural elucidation of the molecule.

    Conclusions:

    • The absolute configurations of amphidinolide E have been established through rigorous spectroscopic and chemical analysis.
    • This detailed structural information is vital for future synthetic studies and for evaluating its potential as a therapeutic agent.
    • The stereochemistry of amphidinolide E is now fully characterized, contributing to the knowledge of marine-derived cytotoxic compounds.