Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 46, Issue 12, Pages 5902-5909Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2011.09.054
Keywords
Tuberculosis; Isoniazid; Hydrazone; Antitubercular drug; In vitro activity
Categories
Funding
- Hungarian National Science Fund [OTKA 68358]
- National Office for Research and Technology [NKFP_07_1-TB_INTER-HU]
- Slovenian Research Agency [P1-0230-103, BI-CZ/10-11-005]
- [MSM 0021620822]
- [MSM 0021627501]
- [IGA NS 10367-3]
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A series of new isoniazid hydrazones was synthesized by two procedures. In the first isoniazid was activated with diethoxymethyl acetate and condensed with the appropriate anilines. Alternatively, substituted anilines were activated by diethoxymethyl acetate and subsequently condensed with isoniazid. NMR study confirmed that both synthetic approaches gave the same tautomer. All compounds were screened for in vitro antimycobacterial activity. Most of them exhibited the same activity against Mycobacterium tuberculosis (MIC 1 mu mol L-1) as isoniazid (INH), better activity against Mycobacterium kansasii 325/80 (MIC 0.125-0.250 mu mol L-1), high value of selectivity index (SI) and IC50 between 0.0218 and 0.326 mmol L-1. Compound 2o with the best SI was used as a model compound for the stability test and was found to be stable at neutral pH, but under acidic conditions it slowly hydrolysed. (C) 2011 Elsevier Masson SAS. All rights reserved.
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