synthesis and antimicrobial activity of some new 1,3,4-thiadiazole derivatives合成及抗菌活性的一些新的1,3,4-thiadiazole衍生品.pdf
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Molecules 2012, 17, 14625-14636; doi:10.3390/molecules171214625
OPEN ACCESS
molecules
ISSN 1420-3049
/journal/molecules
Article
Synthesis and Antimicrobial Activity of Some New
1,3,4-Thiadiazole Derivatives
Thoraya A. Farghaly, Magda A. Abdallah * and Mohamed R. Abdel Aziz
Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
* Author to whom correspondence should be addressed; E-Mail: mkamalh2009@.
Received: 16 October 2012; in revised form: 23 November 2012 / Accepted: 26 November 2012 /
Published: 10 December 2012
Abstract: New series of 1,3,4-thiadiazoles have been prepared via reaction of
1,3,4-thiadiazolenaminones 1 with N-phenyl 2-oxopropanehydrazonoyl chloride (2) in
dioxane in the presence of triethylamine. Also, some new heterocycles incorporating
1,3,4-thiadiazole ring were obtained by reaction of 1,3,4-thiadiazolenaminones 1
with nitrogen-nucleophiles like hydrazine hydrate, 3-amino-1,2,4-triazole and
2-aminobenzimidazole. The structure of the new products was established based on
elemental and spectral analysis. The relation between the structure of the products and their
activity towards some microorganisms was studied and promising results were obtained.
Keywords: antimicrobial activity; enaminone; 1,3,4-thiadiazole; hydrazonoyl halides
1. Introduction
Recently, the chemistry of enaminones has received considerable attention due to
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