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2-Amino-4-arylthiazole Derivatives as Anti-giardial Agents: Synthesis, Biological Evaluation and QSAR Studies

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Mocelo-Castell R., Villanueva-Novelo C., Cáceres-Castillo D., Carballo R. M., Quijano-Quiñones R. F., Quesadas-Rojas M., Cantillo-Ciau Z., Cedillo-Rivera R., Moo-Puc R. E., Moujir L. M., Mena-Rejón G. J.

Open Chemistry

2015

vol. 13

issue 1

A series of seven 2-amino-4-arylthiazoles were prepared following Hantzsch’s modified method under microwave irradiation. A set of 50 derivatives was obtained and the in vitro activity against Giardia intestinalis was evaluated. The results on the biological activity revealed that, in general, the N-(5-bromo-4-aryl-thiazol-2-yl)-acetamide scaffold showed high bioactivity. In particular, compounds 6e (IC50 = 0.39 μM) and 6b (IC50 = 0.87 μM) were found to be more potent than the positive control metronidazole. Citoxicity and acute toxicity tests performed showed low toxicity and high selectivity of the most active compounds (6e SI = 139, 6b SI = 52.3). A QSAR analysis was applied to a data set of 37 obtained 2-amino-4-arylthiazoles derivatives and the best model described a strongly correlation between the anti-giardiasic activity and molecular descriptors as E2M, RDF115m, F10, MATS6v, and Hypnotic-80, with high statistical quality. This finding indicates that N-substituted aminothiazole scaffold should be investigated for the development of highly selective anti-giardial agent.

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1 Open Chemistry

1 2015

1 Cantillo-Ciau Z.

1 Carballo R. M.

1 Cedillo-Rivera R.

1 Cáceres-Castillo D.

1 Mena-Rejón G. J.

1 Mocelo-Castell R.

1 Moo-Puc R. E.

1 Moujir L. M.

1 Quesadas-Rojas M.

1 Quijano-Quiñones R. F.

1 Villanueva-Novelo C.

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2-Amino-4-arylthiazole Derivatives as Anti-giardial Agents: Synthesis, Biological Evaluation and QSAR Studies