Development of benzo[d]oxazol-2(3H)-ones derivatives as novel inhibitors of Mycobacterium tuberculosis InhA
作者:Ganesh S. Pedgaonkar、Jonnalagadda Padma Sridevi、Variam Ullas Jeankumar、Shalini Saxena、Parthiban Brindha Devi、Janupally Renuka、Perumal Yogeeswari、Dharmarajan Sriram
DOI:10.1016/j.bmc.2014.08.031
日期:2014.11
A series of twenty seven substituted 2-(2-oxobenzo[d]oxazol-3(2H)-yl) acetamide derivatives were designed based on our earlier reported Mycobacterium tuberculosis (MTB) enoyl-acyl carrier protein reductase (InhA) lead. Compounds were evaluated for MTB InhA inhibition study, in vitro activity against drug-sensitive and -resistant MTB strains, and cytotoxicity against RAW 264.7 cell line. Among the compounds tested, 2-(6-nitro-2-oxobenzo[d] oxazol-3(2H)-yl)-N-(5-nitrothiazol-2-yl) acetamide (30) was found to be the most promising compound with IC50 of 5.12 +/- 0.44 mu M against MTB InhA, inhibited drug sensitive MTB with MIC 17.11 mu M and was non-cytotoxic at 100 mu M. The interaction with protein and enhancement of protein stability in complex with compound 30 was further confirmed biophysically by differential scanning fluorimetry. (C) 2014 Elsevier Ltd. All rights reserved.