Synthesis, Characterization and Biological Applications of New Guanidinium and Aminoguanidinium Salts of 6-Hydroxypyridine-3-Carboxylic Acid

IF 2.4 3区 化学 Q2 CHEMISTRY, ORGANIC Polycyclic Aromatic Compounds Pub Date : 2024-11-25 DOI:10.1080/10406638.2024.2311699
Prabha Devi Balakrishnan , Sangeedha Appusamy , Kanchana Ponnusamy
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Abstract

The reaction of 6-hydroxypyridine-3-carboxylic acid with guanidine bicarbonate and aminoguanidine hydrogen carbonate, in different molar ratios (1:1, 1:2, and 2:1) yield salts of composition[GunH][C6H4NO3]. H2O(1),[GunH][C6H4NO3][C6H5NO3](2),[GunH]2[C6H3NO3]. H2O(3),[AmguH][C6H4NO3](4),[AmguH][C6H4NO3][C6H5NO3](5),[AmguH]2[C6H3NO3](6). The physicochemical techniques like elemental, spectral and thermal studies were employed to characterize the compounds. All the six as prepared compounds were found to be polycrystalline in nature. The N-N stretching frequency of aminoguanidine moiety appear in the range of 989–914 cm−1. Proton nuclear magnetic resonance (1H NMR) results show signals at7.5–7.9 δ for NH2 protons (1–6). Thermal data of all the as prepared salts exhibit continuous decomposition to produce carbon residue as end products. Density functional theoretical studies were carried out to optimize the structure of the compounds theoretically. The lower molecular orbital energy reveal, the high biological activity of the compounds. The broth disk diffusion method was used to examine the antibacterial activities of compounds (1–6) against Gram-negative and Gram-positive bacterial pathogens. The compound 3 showed potential antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria showing 24 and 20 mm, zone of inhibition respectively. Molecular docking (MD) studies were performed for the compounds, with protein structures of Staphylococcus aureus (5CZZ) and Escherichia coli (3T88). The results were consistent with the experimental data obtained from the antibacterial activity.
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来源期刊
Polycyclic Aromatic Compounds
Polycyclic Aromatic Compounds 化学-有机化学
CiteScore
3.70
自引率
20.80%
发文量
412
审稿时长
3 months
期刊介绍: The purpose of Polycyclic Aromatic Compounds is to provide an international and interdisciplinary forum for all aspects of research related to polycyclic aromatic compounds (PAC). Topics range from fundamental research in chemistry (including synthetic and theoretical chemistry) and physics (including astrophysics), as well as thermodynamics, spectroscopy, analytical methods, and biology to applied studies in environmental science, biochemistry, toxicology, and industry. Polycyclic Aromatic Compounds has an outstanding Editorial Board and offers a rapid and efficient peer review process, as well as a flexible open access policy.
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