Novel D-Ribofuranosyl Tetrazoles: Synthesis, Characterization, In Vitro Antimicrobial Activity, and Computational...

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Computational Chemistry

Background:

• The rise of antibiotic resistance necessitates the development of novel antimicrobial agents.
• Tetrazole derivatives are recognized for their diverse biological activities, including antimicrobial properties.

Purpose of the Study:

• To synthesize and evaluate novel 2,5-disubstituted tetrazole derivatives incorporating O-methyl-2,3-O-isopropylidene-(D)-ribofuranoside moieties.
• To assess the antibacterial efficacy and explore the molecular interactions of these novel compounds.

Main Methods:

• Synthesis of tetrazole derivatives via N-alkylation reactions.
• Characterization using nuclear magnetic resonance (NMR) spectroscopy.
• Antibacterial activity testing against key pathogens (e.g., E. coli, S. aureus).
• Computational analysis including Density Functional Theory (DFT) and molecular dynamics simulations.
• Protein-ligand binding studies using crystal structure modeling of protein 7AZ5.

Main Results:

• Several synthesized N-ribofuranosyl tetrazole derivatives exhibited significant antibacterial activity.
• Compounds 1c and 5c demonstrated superior minimum inhibitory concentrations (MICs) against E. coli and S. aureus compared to chloramphenicol and ampicillin.
• Computational modeling indicated strong binding affinities of compounds 1c and 5c to the DNA polymerase sliding clamp of E. coli.
• Molecular dynamics simulations confirmed the relative stability of compounds 3c and 5c within the 7AZ5 binding site.

Conclusions:

• The synthesized N-ribofuranosyl tetrazole derivatives, particularly compounds 1c and 5c, represent promising candidates for new antibacterial drug development.
• Their potent in vitro activity, favorable binding profiles, and chemical stability support their potential as lead compounds.
• Further investigation into these derivatives could lead to novel therapeutic strategies against bacterial infections.