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Volume 20, Issue 10
  • ISSN: 1573-4064
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Abstract

Background

Among various carboxylic acid derivatives, valeric acid or pentanoic acid is found to be widely distributed in nature. It is a straight-chain alkyl carboxylic acid containing five carbon atoms. Due to the therapeutic value of valeric acid, it is used as a versatile nucleus in the pharmaceutical field. Valeric acid derivatives are associated with a broad spectrum of biological activities, like anticonvulsant, antiplatelet, antidiabetic, and plant growth activities.

Aim

It has previously been revealed that peptide derivatives of carboxylic acids are accountable for enhanced antimicrobial activity. Therefore, it was hypothesized that coupling peptides with valeric acid would increase the antimicrobial properties of the target compounds. So, the objective of the present study was to synthesize peptide derivatives of 5-bromovaleric acid and evaluate their antibacterial and antifungal activities.

Methods

5-bromovaleric acid was synthesized by the reaction of cyclopentanone and hydrogen peroxide in the presence of copper bromide and sodium bromide. Additionally, 5-bromovaleric acid was coupled with amino acid methyl esters, dipeptides, tripeptides, and tetrapeptides in the presence of dicyclohexylcarbodimide (DCC) and -methylmorpholine (NMM) as a base under continuous stirring for 36 hours to produce its peptide derivatives.

Results

The results obtained showed that 5-bromovaleric acid possesses more potent antibacterial activity than N-terminal 5-bromovaleric acid conjugates of selected di-, tri, and tetra peptide C-terminal methyl esters against ciprofloxacin as a standard. The selected dipeptide and tripeptide N-terminal 5-bromovaleric acid-conjugated C-terminal methyl ester derivatives were more active than the selected tetrapeptide methyl ester analogue. Using fluconazole as a reference, the antifungal efficacy of 5-bromovaleric acid against and declined as it was combined with C-terminal methyl esters of selected dipeptides, tripeptides, and tetrapeptides.

Conclusion

The novel selected peptide derivatives had less antibacterial and antifungal action than the parent 5-bromovaleric acid. Antibacterial and antifungal investigations showed that 5-bromopentanoic acid peptide derivatives might impair antimicrobial efficacy. Further, attaching 5-bromopentanoic acid to di, tri, and tetra peptides did not boost their antibacterial potential.

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2024-12-01
2024-11-23

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Synthesis and Biological Evaluation of Amino Acid and Peptide Conjugates of 5-Bromovaleric Acid
Medicinal Chemistry 20, 950 (2024); https://doi.org/10.2174/0115734064302733240621054643
/content/journals/mc/10.2174/0115734064302733240621054643
/content/journals/mc/10.2174/0115734064302733240621054643
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  • Article Type:     Research Article
Keyword(s): 5-bromovareric acid; antibacterial; antifungal; pentanoic acid; peptides; Valeric acid

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