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Azabicyclic indole esters as potent 5-HT4 receptor antagonists

P A Wyman1, L M Gaster, F D King

  • 1SmithKline Beecham Pharmaceuticals, Harlow, Essex, U.K.

Bioorganic & Medicinal Chemistry
|February 1, 1996
PubMed
Summary

Researchers synthesized novel azabicyclic indole esters as potent 5-HT4 receptor antagonists. The optimized compound 34 demonstrated significant antagonist activity in a guinea pig colon model, highlighting its therapeutic potential.

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Area of Science:

  • Medicinal Chemistry
  • Pharmacology
  • Neuroscience

Background:

  • The 5-HT4 receptor is implicated in various physiological processes, including gastrointestinal motility.
  • Developing selective 5-HT4 receptor antagonists is crucial for treating related disorders.

Purpose of the Study:

  • To synthesize and evaluate novel azabicyclic indole esters as potential 5-HT4 receptor antagonists.
  • To optimize lead compounds for enhanced potency and efficacy.

Main Methods:

  • Synthesis of a series of azabicyclic indole esters.
  • In vitro and in vivo pharmacological testing to determine 5-HT4 receptor antagonist activity.
  • Structure-activity relationship (SAR) studies for optimization.

Main Results:

Related Experiment Videos

  • Several azabicyclic indole esters were successfully synthesized.
  • Compound 19 emerged as a potent 5-HT4 receptor antagonist.
  • Further optimization led to compound 34 with a pIC50 of 9.5 in the guinea pig distal colon longitudinal muscle myenteric plexus preparation.

Conclusions:

  • Azabicyclic indole esters represent a promising class of 5-HT4 receptor antagonists.
  • Compound 34 exhibits high potency and warrants further investigation for therapeutic applications in conditions modulated by the 5-HT4 receptor.