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Gaining Synthetic Appreciation for the Gedunin ABC Ring System.

David M Pinkerton1, Timothy J Vanden Berg1, Paul V Bernhardt1

  • 1School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia, 4072, Queensland, Australia.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 3, 2017
PubMed
Summary

Researchers report a novel synthetic strategy for gedunin, a complex natural product with diverse biological activities. This study presents the first total synthesis of its functionalized ABC ring system, paving the way for further investigation.

Keywords:
Hsp90epoxidationgeduninhydrogenationlimonoid

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Area of Science:

  • Organic Chemistry
  • Natural Product Synthesis
  • Medicinal Chemistry

Background:

  • Gedunin, isolated in 1960, possesses significant biological activities.
  • Despite its potential, a comprehensive synthetic approach has been lacking.
  • Understanding gedunin's structure-activity relationship requires efficient synthesis.

Purpose of the Study:

  • To develop a de novo synthetic route to gedunin.
  • To construct the complex, functionalized ABC ring system of gedunin.
  • To establish a foundation for exploring gedunin analogs.

Main Methods:

  • Retrosynthetic analysis of the gedunin core structure.
  • Development of key carbon-carbon bond-forming reactions.
  • Stereoselective installation of functional groups within the ABC rings.

Main Results:

  • Successful synthesis of the fully functionalized ABC ring system of gedunin.
  • Demonstration of a viable strategy for constructing complex polycyclic architectures.
  • Establishment of crucial stereocenters with high fidelity.

Conclusions:

  • The presented synthetic approach provides access to the challenging gedunin ABC ring system.
  • This work overcomes a significant synthetic hurdle in natural product chemistry.
  • The developed methodology can be applied to the synthesis of related compounds.