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Related Experiment Videos

The first reported anionic oxy retro-ene reaction.

M E Jung1, P Davidov

  • 1Department of Chemistry and Biochemistry, University of California-Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA. jung@chem.ucla.edu

Organic Letters
|September 14, 2001
PubMed
Summary
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Researchers achieved high yields of cyclopentenone 7 from diol 6 using potassium hydride (KH) and 18-crown-6. This study details the first observed anionic oxy retro-ene reaction coupled with an intramolecular aldol condensation.

Area of Science:

  • Organic Chemistry
  • Reaction Mechanisms

Background:

  • Cyclopentenones are valuable synthetic intermediates.
  • Anionic oxy-cope rearrangements are known, but retro-ene variants are less explored.

Purpose of the Study:

  • To investigate the reaction of diol 6 with potassium hydride (KH) and 18-crown-6.
  • To elucidate the reaction mechanism, identifying novel transformations.

Main Methods:

  • Treatment of diol 6 with KH and 18-crown-6 at room temperature.
  • Mechanistic analysis to determine the reaction pathway.

Main Results:

  • Successful synthesis of cyclopentenone 7 in good yields.
  • Identification of an anionic oxy retro-ene reaction as the initial step.

Related Experiment Videos

  • Observation of a subsequent tandem intramolecular aldol condensation.

    • Conclusions:

    • The reaction represents the first documented instance of an anionic oxy retro-ene reaction.
    • The tandem reaction sequence provides an efficient route to substituted cyclopentenones.