Antiviral quinolinehydrazones. A modified Free-Wilson analysis

Area of Science:

• Medicinal Chemistry
• Virology
• Pharmacology

Background:

• Viral infections like influenza and Coxsackie pose significant public health challenges.
• Developing novel antiviral agents with improved efficacy and safety profiles is crucial.

Purpose of the Study:

• To synthesize and evaluate a series of 4-quinolinehydrazone derivatives for antiviral activity.
• To establish structure-activity relationships (SAR) for these compounds to guide further drug design.

Main Methods:

• Synthesis of 84 distinct 4-quinolinehydrazone compounds.
• In vivo antiviral screening against influenza A2 and Coxsackie B1 viruses in a murine model.
• Qualitative analysis of SAR using a modified Free-Wilson approach for 44 derivatives.

Main Results:

• Thirty-nine out of 84 synthesized quinolinehydrazones exhibited significant antiviral activity against influenza A2 and/or Coxsackie B1.
• The effective dose for active compounds was determined to be 25 mg/kg subcutaneously.
• Structure-activity relationships were elucidated, providing insights into key structural features for antiviral potency.

Conclusions:

• 4-Quinolinehydrazones represent a promising scaffold for the development of novel antiviral therapeutics.
• The identified SAR can inform the design of more potent and selective antiviral agents targeting influenza and Coxsackie viruses.