Synthesis, Antimicrobial Evaluation, and Structure–Activity Relationship of α-Pinene Derivatives

Citations Over TimeTop 10% of 2014 papers

Abstract

Several (+)- and (-)-α-pinene derivatives were synthesized and evaluated for their antimicrobial activity toward Gram-positive bacteria Micrococcus luteus and Staphylococcus aureus, Gram-negative bacterium Escherichia coli, and the unicellular fungus Candida albicans using bioautographic assays. (+)-α-Pinene 1a showed modest activity against the test organisms, whereas (-)-α-pinene 1b showed no activity at the tested concentration. Of all the α-pinene derivatives evaluated, the β-lactam derivatives (10a and 10b) were the most antimicrobial. The increase in the antimicrobial activity of 10a compared to 1a ranged from nearly 3.5-fold (C. albicans) to 43-fold (S. aureus). The mean ± standard deviation for the zone of inhibition (mm) for 10a (C. albicans) was 31.9 ± 4.3 and that for S. aureus was 51.1 ± 2.9. Although (-)-α-pinene 1b was not active toward the test microorganisms, the corresponding β-lactam 10b, amino ester 13b, and amino alcohol 14b showed antimicrobial activity toward the test microorganisms. The increase in the antimicrobial activity of 10b compared to 1b ranged from 32-fold (S. aureus) to 73-fold (M. luteus). The mean ± standard deviation for the zone of inhibition (mm) for 10b (S. aureus) was 32.0 ± 0.60 and that for M. luteus was 73.2 ± 0.30.

Related Papers

• → Facile Regioselective Synthesis of Novel bis‐Thiazole Derivatives and Their Antimicrobial Activity(2013)36 cited
• → The MRJP1 honey glycoprotein does not contribute to the overall antibacterial activity of natural honey(2016)20 cited
• → A novel chresdihydrochalcone from Streptomyces chrestomyceticus exhibiting activity against Gram-positive bacteria(2020)18 cited
• → Purification of equine neutrophil lysozyme and its antibacterial activity against Gram-positive and Gram-negative bacteria(1991)18 cited
• → Triethyl- n -Hexylammonium Triethyl- n -Hexylboride: a New Antimicrobial Showing Activity Against Candida albicans and Gram-Positive Bacteria(1975)6 cited