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Paper | Regular issue | Vol 85, No. 5, 2012, pp.1141-1154
Published online, 6th April, 2012
DOI: 10.3987/COM-12-12456
Synthesis, Characterization and Evaluation of Antimicrobial Activity of Some Novel 1,2,4-Triazoles and 1,3,4-Thiadiazoles Bearing Imidazole Nuclues

Mohamed Reda Aouad,* Nadjet Rezki, Mohamed Kasmi, Linda Aouad, and Merieme A. Rezki

*Department of Chemistry, Faculty of Science, Taibah University, Madinah Munawwarah, Saudi Arabia

Abstract

A series of N1-[(4,5-di and 1,4,5-triphenylimidazol-2-yl)thioacetyl]-N4-alkyl/aryl-thiosemicarbazides 3-7 were synthesized from (4,5-di and 3,4,5-triphenylimidazol-2-yl)thioacetic acid hydrazide 1, 2. The treatment of compounds 3-7 with NaOH gave 5-[(4,5-di and 1,4,5-triphenylimidazol-2-yl)-3-thiomethyl]-4-alkyl/aryl-2H-1,2,4-triazoles-3-thione 8-12, while the acidic treatment of compounds 3-7 afforded 5-[(4,5-di- and 1,4,5-triphenylimidazol-2-yl)-3-thiomethyl]-2-alkyl/arylamino-1,3,4-thiadiazoles 13-17. Moreover, potassium hydrazinecarbothionates 18, 19 were obtained from the reaction of acyl hydrazides 1, 2 with carbon disulfides in basic media and converted into 4-amino-1,2,4-triazole-3-thiones 20, 21 and 1,3,4-thiadiazole-2-thiols 22, 23 by the treatment with hydrazine hydrate and sulfuric acid, respectively. All newly synthesized compounds were screened for their antimicrobial activity.