Volume 24, Issue 4 pp. 309-321
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Synthesis and Biological Evaluation of Some New N1-[4-(4-Chlorophenylsulfonyl)benzoyl]-N 4-(aryl)-thiosemicarbazides and Products of Their Cyclization

Stefania-Felicia Barbuceanu

Corresponding Author

Stefania-Felicia Barbuceanu

Organic Chemistry Department, Faculty of Pharmacy, 020956 Bucharest, Romania

Correspondence to: Stefania-Felicia Barbuceanu; e-mail: [email protected].Search for more papers by this author
Gabriela Bancescu

Gabriela Bancescu

Microbiology Department, Faculty of Dentistry, 050051 Bucharest, Romania

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Gabriel Saramet

Gabriel Saramet

Pharmaceutical Techniques Department, Faculty of Pharmacy, 020956 Bucharest, Romania

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Florica Barbuceanu

Florica Barbuceanu

Institute for Diagnosis and Animal Health, 050557 Bucharest, Romania

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Constantin Draghici

Constantin Draghici

C. D. Nenitescu Institute of Organic Chemistry, Romanian Academy, 060023 Bucharest, Romania

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Flavian Stefan Radulescu

Flavian Stefan Radulescu

Pharmaceutical Industry Department, Faculty of Pharmacy, 020956 Bucharest, Romania

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Aura Ionescu

Aura Ionescu

Pharmacology and Clinical Pharmacy Department, Faculty of Pharmacy, 020956 Bucharest, Romania

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Simona Negres

Simona Negres

Pharmacology and Clinical Pharmacy Department, Faculty of Pharmacy, 020956 Bucharest, Romania

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First published: 29 May 2013
Citations: 4

Contract grant sponsor: Sectoral Operational Programme Human Resources Development, European Social Fund.

Contract grant sponsor: Government of Romania.

Contract grant number: POSDRU/89/1.5/S/64109.

ABSTRACT

In the present study, new 1,2,4-triazoles, 1,3,4-thiadiazoles, and acylthiosemicarbaz-ides derived from 4-(4-chlorophenylsulfonyl)benzoic acid hydrazide were synthesized and screened for their antimicrobial and analgesic activities. Acylthiosemicarbazides 2–4 were synthesized by a reaction of 4-(4-chlorophenyl-sulfonyl)benzoic acid hydrazide 1 with different arylisothiocyanates.4,5-Disubstituted-2,4-dihydro-3H-1,2,4-triazol-3-thiones 5–7 and 2,5-disubstituted-1,3,4-thiadiazoles 8–10 were obtained by dehydrative cyclization of corresponding acylthiosemicarbazide derivatives 2–4 in basic media (8% aqueous sodium hydroxide) and in acidic media (sulfuric acid or phosphorous oxychloride), respectively. The structures of the newly synthesized compounds have been confirmed on the basis of elemental analysis and spectral studies (IR, 1H NMR, 13C NMR, MS). Their antimicrobial activities against some bacteria and yeasts were investigated. The analgesic activity of all compounds was performed with two pharmacological tests: the writhing test induced with acetic acid and hot-plate test. The results showed that triazole 7 had the best antimicrobial activity against Bacillus cereus. In the chemical stimulus test, triazoles 6 and 7 were the most active compounds whereas in the hot-plate test thiadiazoles 9 and 10 exhibited the highest analgesic activity.

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