[Azoles. 18. Sulfonylindazole derivatives]

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Biochemistry

Background:

• Indazole derivatives are known for diverse biological activities.
• Enzymes like phospholipase-A2 and lipoxygenase-I are implicated in inflammatory processes.
• Developing new inhibitors for these enzymes is crucial for therapeutic advancements.

Purpose of the Study:

• To synthesize novel sulphonyl indazole derivatives.
• To elucidate the chemical structures of the synthesized compounds.
• To investigate the inhibitory potential of selected derivatives against phospholipase-A2 and lipoxygenase-I.

Main Methods:

• Nucleophilic substitution of hydrogen for synthesis of sulphonyl indazole derivatives (compounds 9-16).
• Hydrogen Nuclear Magnetic Resonance (H-NMR) spectroscopy for structural analysis.
• Chlorination reactions to provide chemical structural proof via steric hindrance.
• Enzyme inhibition assays for phospholipase-A2 and lipoxygenase-I using compounds 3, 4, 7, 8, 14, and 16.

Main Results:

• Successful synthesis of sulphonyl indazole derivatives 9-16.
• Structural confirmation of products using H-NMR spectra.
• Steric hindrance in chlorination provided further structural evidence.
• Evaluation of compounds 3, 4, 7, 8, 14, and 16 revealed potential enzyme inhibition.

Conclusions:

• Novel sulphonyl indazole derivatives were synthesized and characterized.
• The study provides a foundation for further exploration of these compounds as potential therapeutic agents.
• Selected derivatives show promise in inhibiting key enzymes involved in inflammation.