Highly efficient and catalyst-free ring-closing reaction of 2'-hydroxychalcones into potential bioactive flavanones

Area of Science:

• Green Chemistry
• Organic Synthesis
• Medicinal Chemistry

Background:

• Ionic liquids offer eco-friendly solvent properties for chemical reactions.
• Flavanones are a class of compounds with potential biological activities.
• Efficient synthesis of flavanones is crucial for drug discovery.

Purpose of the Study:

• To develop an efficient and eco-friendly method for flavanone synthesis using ionic liquids.
• To investigate the anticancer properties of synthesized flavanones.
• To identify novel anticancer agents from the synthesized flavanone library.

Main Methods:

• Synthesis of seventeen flavanones via reversible ring-closing of 2 -hydroxychalcones in ionic liquids.
• Optimization of reaction conditions including catalyst and ionic liquid choice.
• In vitro anticancer activity screening against lung (A549) and breast (MCF-7) cancer cell lines.

Main Results:

• Seventeen flavanones were synthesized in 1-8 hours with yields ranging from 38% to 88%.
• The ionic liquid [Bpy]Br demonstrated high recyclability over four cycles without significant yield reduction.
• Flavanone 2 m (4 -hydroxy-3 -methoxyflavone) exhibited potent in vitro anticancer efficacy.

Conclusions:

• Ionic liquids provide a sustainable and effective medium for flavanone synthesis.
• The synthesized flavanones hold promise as potential anticancer agents.
• Flavanone 2 m warrants further investigation as a lead compound for anticancer drug development.