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Molecules 2011, 16(1), 523-531; doi:10.3390/molecules16010523
Communication

Synthesis and Anti-Bacterial Activities of a Bis-Chalcone Derived from Thiophene and Its Bis-Cyclized Products

1,2 and 1,*
1 Chemistry Department, Faculty of Science, King Abdul Aziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia 2 The Center of Excellence for Advanced Materials, King Abdul Aziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 26 December 2010 / Accepted: 10 January 2011 / Published: 12 January 2011
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Abstract

A chalcone was prepared by the reaction of terephthalaldehyde with 3-acetyl-2,5-dimethylthiophene. Treatment of this chalcone with thiosemicarbazide/phenyl hydrazine/guanidine hydrochloride/thiourea afforded the corresponding pyrazoline,  pyrazole, and pyrimidine in good yields. All the new compounds have been characterized by IR, 1H-NMR, 13C-NMR, GC-MS and elemental analyses. The anti-bacterial activity of these compounds were first tested in vitro by the disk diffusion assay against two Gram-positive and two Gram-negative bacteria, and then the minimum inhibitory concentration (MIC) was determined with the reference of standard drug chloramphenicol. The results showed that the pyrazoline derivative is better at inhibiting growth of both types of bacteria (Gram-positive and Gram-negative) compared to chloramphenicol.
Keywords: chalcone; pyrazoline; pyrimidine; anti-bacterial activity; chloramphenicol chalcone; pyrazoline; pyrimidine; anti-bacterial activity; chloramphenicol
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Asiri, A.M.; Khan, S.A. Synthesis and Anti-Bacterial Activities of a Bis-Chalcone Derived from Thiophene and Its Bis-Cyclized Products. Molecules 2011, 16, 523-531.

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