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Related Experiment Videos

New nepenthone and thevinone derivatives

J Marton1, C Simon, S Hosztafi

  • 1Alkaloida Chemical Company Ltd., Tiszavasvári, Hungary.

Bioorganic & Medicinal Chemistry
|February 1, 1997
PubMed
Summary

Researchers synthesized novel N-substituted phenyl-6,14-ethenomorphinan derivatives using Grignard reactions. These compounds showed high affinity but low selectivity for delta-opioid receptors, with some exhibiting mu-opioid receptor specificity.

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Area of Science:

  • Organic Chemistry
  • Medicinal Chemistry
  • Pharmacology

Background:

  • Thevinone and nepenthone derivatives are key scaffolds in opioid research.
  • Developing novel opioid receptor ligands requires precise stereochemical control and diverse N-substitution.

Purpose of the Study:

  • To synthesize a library of N-substituted (20S)- and (20R)-phenyl-6,14-ethenomorphinan derivatives.
  • To investigate the opioid receptor binding affinities and selectivities of the synthesized compounds.

Main Methods:

  • Diastereoselective Grignard reactions with thevinone and nepenthone derivatives.
  • N-demethylation and subsequent functionalization.
  • Synthesis of N-allyl, N-dimethylallyl, and N-propargyl derivatives via cyanamides.
  • Biochemical assays for opioid receptor binding.

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Main Results:

  • Successfully synthesized a series of N-substituted (20S)- and (20R)-phenyl-6,14-ethenomorphinan derivatives (6a-y).
  • Demonstrated stereoselective formation of tertiary alcohols (5a-f, 5m-r for 20R; 5g-l, 5s-y for 20S).
  • Synthesized N-allyl, N-dimethylallyl, and N-propargyl derivatives through cyanamide intermediates.

Conclusions:

  • The synthesized ethenomorphinan derivatives exhibit high affinity for delta-opioid receptors.
  • Selectivity across opioid receptor subtypes was generally low, though specific compounds showed mu-opioid receptor specificity.
  • This study provides novel chemical entities for further investigation into opioid receptor modulation.