Nonsteroidal antiinflammatory agents. Part 16: Stereomeric 3-aryl-biphenylyl-hydroxy-propionic acids

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Pharmacology

Background:

• Structure-activity relationships (SAR) are crucial for developing effective anti-inflammatory drugs.
• Chiral arylalkanoic acids represent a significant class of compounds with potential therapeutic applications.
• Understanding stereoisomer-specific activity is key to optimizing drug efficacy and safety.

Purpose of the Study:

• To synthesize stereoisomeric aryl-biphenylyl-hydroxypropionic acids (3a-d).
• To evaluate the anti-inflammatory activity of these compounds.
• To investigate the SAR of these chiral acids.

Main Methods:

• Synthesis of diastereomeric racemic erythro- and threo-acids via reaction of alpha-lithiated biphenylyl-acetic acid salts with aldehydes.
• Separation of diastereomers.
• Determination of relative configuration using 1H-NMR spectroscopy.
• Resolution of enantiomers.
• Evaluation of anti-inflammatory activity of enantiomeric potassium salts using the carrageenan test.

Main Results:

• Stereoisomeric aryl-biphenylyl-hydroxypropionic acids were successfully synthesized and characterized.
• The relative configurations of the erythro- and threo-isomers were determined.
• Enantiomers were resolved, allowing for stereoisomer-specific activity assessment.
• The anti-inflammatory activities of the resolved enantiomers were evaluated.

Conclusions:

• The study successfully prepared and evaluated novel chiral aryl-biphenylyl-hydroxypropionic acids.
• Stereochemistry significantly influences the anti-inflammatory activity of these compounds.
• Findings contribute to understanding the SAR of chiral anti-inflammatory agents.