Journal
MEDICINAL CHEMISTRY RESEARCH
Volume 22, Issue 7, Pages 3364-3371Publisher
SPRINGER BIRKHAUSER
DOI: 10.1007/s00044-012-0351-0
Keywords
Quinazolinone derivatives; Antitubercular activity; Pyrazole derivatives
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A series of 2-(substituted-phenyl)-3-(((3-(pyridin-4-yl)-1-(p-tolyl)-1H-pyrazol-4-yl)methylene)amino)-quinazolin-4(3H)-ones have been synthesized. The structures of the synthesized compounds were assigned on the basis of IR, H-1 NMR, C-13 NMR, and mass spectral data, while their abilities to inhibit growth of Mycobacterium tuberculosis in vitro have been determined. The results show that compounds 5a, 5c, 5d, 5g, and 5k exhibited excellent antitubercular activity with percentage inhibition of 96, 90, 94, 93, and 92, respectively at a minimum inhibitory concentration (MIC) of < 6.25 mu g/mL, whereas compounds 5b, 5e, 5f, 5h, 5i, 5j, and 5l exhibited moderate- to- good antitubercular activity with percentage inhibition of 68, 70, 67, 64, 59, 73, and 67, respectively, at a MIC of > 6.25 mu g/mL. From the secondary screening, the actual MIC of compounds 5a, 5c, 5d, 5g, and 5k are < 3.125.
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