Abstract
A convenient, one-pot multi-component synthesis of new 2,4-disubstituted hydrazinyl-thiazoles was accomplished using different aldehydes/ketones, thiosemicarbazide, and 4-methoxy phenacyl bromide in the presence of a catalytic amount of AcOH in EtOH. Products were obtained in reasonable yields and high purity. The in vitro antioxidant activity of hydrazinyl-thiazoles was evaluated by DPPH radical scavenging activity in comparison to ascorbic acid. Synthesized thiazoles 14c and 14g possessed the lowest \(\hbox {IC}_{50}\) values. Also, hydrazinyl-thiazoles were screened for their in vitro antibacterial activity against six strains of bacteria including S. aureus, M. luteus, E. coli, Ps. aeruginosa, B. subtilis, and A. hydrophila where some products showed good antibacterial activity. Moreover, compound 14a showed anticancer activity against melanoma cancerous cell lines A375 with \(\hbox {LC}_{50}= 0.55\hbox { mg}/\hbox {mL}\), slightly selective versus normal cell lines (Hu-2) with \(\hbox {LC}_{50}= 1.19\hbox { mg}/\hbox {mL}\).
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Acknowledgments
The authors are greatly thankful to Dr. Zohreh Ramezanpour and Miss Somaie Rasouli Dogaheh for their helpful assistance in running biological assays. The authors appreciate the valuable and helpful comments of Professor Dr. Guillermo A. Morales, Editor-In-Chief of Molecular Diversity.
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Ghanbari Pirbasti, F., Mahmoodi, N.O. Facile synthesis and biological assays of novel 2,4-disubstituted hydrazinyl-thiazoles analogs. Mol Divers 20, 497–506 (2016). https://doi.org/10.1007/s11030-015-9654-7
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DOI: https://doi.org/10.1007/s11030-015-9654-7