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Antibacterial, DNA photocleavage and molecular docking studies of newly prepared Schiff-based macrocyclic complexes

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Mishra P., Sethi P., Kumar Ramasamy S., Saini A. K., Singh Tuli H., Mittal D., Trehan A.

European Journal of Clinical and Experimental Medicine

2024

vol. 22

issue 1

154-163

Introduction and aim. At present, several microbial diseases are prominent and of concern worldwide. The intent of this study was to examine the antibacterial potential of newly synthesized tetradentate macrocyclic complexes against different bacterial strains. The macrocyclic scaffold has gained attention as a biologically active class of supramolecular chemistry due to its unique properties and ability to target various microorganisms. Thus, the goal of the present study was to develop a series of biologically active transition metal-based macrocycles. Material and methods. All macrocyclic compounds were synthesized by a template method and validated by molar conductivity, elemental studies, and spectral and magnetic studies. Antibacterial activities of all metal complexes were evaluated against Escherichia coli (MTCC 739) and Staphylococcus aureus (MTCC 731) bacterial strains by taking ampicillin as a standard reference drug. DNA photocleavage potential was explored using agarose gel electrophoresis. Results. Results revealed the formation of novel macrocyclic complexes via tetra nitrogen bond trapping of metals. Copper complexes have strong potential against S. aureus bacteria as copper and nickel both show good DNA photocleavage potential. Conclusion. The findings endorse the biomedical relevance of these macrocyclic scaffolds, suggesting avenues for further exploration in targeted drug delivery and potential clinical applications. The proposed octahedral geometry for the complexes enhances our understanding of their structural aspects. This research contributes substantively to the field, laying the foundation for future investigations in advanced antimicrobial design and application.

Synthesis, characterization of isoxazole derivatives and evaluation of their antibacterial, antioxidant and anticancer activity

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Vashisht K., Sethi P., Bansal A., Singh T., Kumar R., Singh Tuli H., Saini S.

European Journal of Clinical and Experimental Medicine

2024

vol. 22

issue 2

376-387

Introduction and aim. The synthesis of heterocyclic compounds containing oxygen and nitrogen is profoundly intriguing due to their mechanistic implications in both research and development within organic chemistry and drug discovery. The primary aim of this study is to fabricate a range of pharmacologically active drugs containing the isoxazole moiety. Material and methods. The synthesis of new derivatives of isoxazole was achieved through a one-pot condensation reaction of 2-[(Substituted phenyl)hydrazono]malononitrile (1) and 3-[(Substituted phenyl)azo]-2,4-Pentanedione (2) with sodium acetate and hydroxylamine hydrochloride (1:1) in ethanol. All the compounds were screened for their in vitro antibacterial activity, in vitro antioxidant and anticancer activity. The synthesized compounds underwent characterization through FTIR, 1H NMR, and 13C NMR analyses, supported by mass spectral data and elemental analysis. Results. A set of novel isoxazole derivatives was synthesized with a favorable yield. Among compounds 1d, 1e, 2c, 2d, and 2e exhibited notable antioxidant activities. Compounds 1a, 1b, and 1c demonstrated significant anticancer potential against prostate cancer [PC3] cell lines compared to normal HEK cell lines, while 2a displayed the highest inhibitory zone against Escherichia coli. Conclusion. Novel compounds with multifaceted biological activities have been successfully designed, and a synthetic route to create isoxazole derivatives has been devised and verified.

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2 European Journal of Clinical and Experimental Medicine

2 Sethi P.

2 Singh Tuli H.

1 Bansal A.

1 Kumar R.

1 Kumar Ramasamy S.

1 Mishra P.

1 Mittal D.

1 Saini A. K.

1 Saini S.

1 Singh T.

1 Trehan A.

1 Vashisht K.

2 2024

Search results

Antibacterial, DNA photocleavage and molecular docking studies of newly prepared Schiff-based macrocyclic complexes

Synthesis, characterization of isoxazole derivatives and evaluation of their antibacterial, antioxidant and anticancer activity