Synthesis, Characterization, and Antibacterial Activity of New Isatin Derivatives
Sumitra Nain1, Garima Mathur1, Tulika Anthwal1
1Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan 304022 India.
New isatin-based Schiff bases demonstrate potent antimicrobial activity. Compound 3c showed superior efficacy against Staphylococcus aureus and Escherichia coli compared to Amoxicillin, highlighting their potential as novel antimicrobial agents.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
- Microbiology
Background:
- The 1H-indol-2,3-dione (isatin) scaffold is a privileged structure in medicinal chemistry, known for diverse biological activities including antimicrobial properties.
- Schiff bases derived from isatin are recognized for their broad-spectrum antimicrobial potential against various pathogens.
Purpose of the Study:
- To synthesize novel Schiff base derivatives of isatin.
- To evaluate the in vivo antimicrobial activity of the synthesized compounds against Gram-negative and Gram-positive bacteria.
Main Methods:
- Synthesis of isatin Schiff bases using conventional and microwave-assisted methods by reacting isatin with o-phenylenediamine.
- Structural characterization of the synthesized derivatives.
- In vivo antimicrobial activity testing using the inhibition zone method against standard bacterial strains.
Main Results:
- Several newly synthesized isatin Schiff base derivatives exhibited significant antimicrobial activity.
- Compounds 3c, 3d, 6a, 6b, and 6d demonstrated good antimicrobial potency.
- Compound 3c showed enhanced activity against Staphylococcus aureus and Escherichia coli compared to the standard drug Amoxicillin.
Conclusions:
- The synthesized isatin Schiff base derivatives are effective antimicrobial agents.
- Compound 3c presents promising therapeutic potential for treating infections caused by Staphylococcus aureus and Escherichia coli.
- This study contributes novel antimicrobial compounds based on the isatin scaffold.
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