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Synthesis, evaluation and docking studies of some 4-thiazolone derivatives as effective lipoxygenase inhibitors

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Abstract

Some promising 4-thiazolone derivatives as lipoxygenase inhibitors were designed, synthesized, characterized and evaluated for anti-inflammatory activity and respective ulcerogenic liabilities. Compounds (1b, 1e, 3b, and 3e) exhibited considerable in vivo anti-inflammatory activity (57.61, 79.35, 75.00, and 79.35%) against carrageenan-induced rat paw edema model, whereas compounds (1e, 3b, and 3e) were found active against the arachidonic acid-induced paw edema model (55.38, 55.38, and 58.46%). The most potent compound (3e) exhibited lesser ulcerogenic liability compared to the standard diclofenac and zileuton. Further, the promising compounds (1e and 3e) were evaluated for in vitro lipoxygenase (LOX; IC50 = 12.98 µM and IC50 = 12.67 µM) and cyclooxygenase (COX) inhibition assay (COX-1; IC50 > 50 µM and, COX-2; IC50 > 50 µM). The enzyme kinetics of compound 3e was evaluated against LOX enzyme and supported by in silico molecular docking and molecular dynamics simulations studies. Overall, the results substantiated that 5-benzylidene-2-phenyl-4-thiazolones are promising pharmacophore for anti-inflammatory activity.

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Acknowledgements

The authors gratefully acknowledge Indian Institute of Technology (BHU) for providing financial assistance through Institute Research Project (IRP) scheme and Design Innovation Center (DIC) scheme. Grant No. IIT (BHU)/R&D/IRP/2015-16/3471/L and Grant No. DIC-IIT(BHU)/L-11, respectively. The authors are also thankful to Department of Health Research, Ministry of Health and Family Welfare for providing the Young Scientist Project in newer areas of Drugs Chemistry (DHR/HRD/YS-15-2015-16).

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Correspondence to Sushant Kumar Shrivastava.

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Supplementary material 1

Spectral studies (FT-IR, 1H-NMR, and 13C-NMR) of some of the synthesized compounds along with the RMSD and RMSF graphs of molecular dynamics simulations can be found in the supplementary material. (DOCX 3096 kb)

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Shrivastava, S.K., Patel, B.K., Tripathi, P.N. et al. Synthesis, evaluation and docking studies of some 4-thiazolone derivatives as effective lipoxygenase inhibitors. Chem. Pap. 72, 2769–2783 (2018). https://doi.org/10.1007/s11696-018-0520-9

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  • DOI: https://doi.org/10.1007/s11696-018-0520-9

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