Abstract
Series of novel 1,2-bis((3-(1-aryl-5-methyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)methylene) hydrazines 4 and 2-(5-(3-(1,2,3-triazol-4-yl)pyrazol-4-yl) pyrazol-1-yl)thiazoles 13 were synthesized using simple and convenient procedures, and their structures were established. Treatment of pyrazole-4-carbaldehydes 1 with methyl ketones in alkaline medium gave the corresponding (E)-1-aryl-3-(3-(1-aryl-5-methyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)prop-2-en-1-ones 3 in 82–86% yields. Treatment of 3 with hydrazine hydrate gave 4, in 69–75% yields, rather than the expected 1-aryl-5-methyl-4-(1-aryl-4-(3-phenyl-4,5-dihydro-1H-pyrazol-5-yl)-1H-pyrazol-3-yl)-1H-1,2,3-triazoles. Reactions of 3 with thiosemicarbazide gave the corresponding carbothioamides 9 which in reaction with phenacyl bromides gave the corresponding dihydropyrazolylthiazoles 13 in 82–87% yields. The novel synthesized product exhibits good antimicrobial activities against the tested microorganisms.
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Abdel-Wahab, B.F., Khidre, R.E., Mohamed, H.A. et al. A Simple Process for the Synthesis of Novel Pyrazolyltriazole and Dihydropyrazolylthiazole Derivatives as Antimicrobial Agents. Arab J Sci Eng 42, 2441–2448 (2017). https://doi.org/10.1007/s13369-017-2530-2
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DOI: https://doi.org/10.1007/s13369-017-2530-2