Benzo[d]thiazole-2-carbanilides as new anti-TB chemotypes: Design, synthesis, biological evaluation, and structure-activity relationship

European Journal of Medicinal Chemistry
2018.0

Abstract

Tuberculosis is the second leading cause of deaths worldwide. The inadequacy of existing drugs to treat TB due to developed resistance and TB-HIV synergism urges for new anti-TB drugs. Seventy-two benzo[d]thiazole-2-carbanilides have been synthesized through CDI-mediated direct coupling of benzo[d]thiazole-2-carboxylic acids with aromatic amines using a three step methodology which includes a green protocol for synthesis of ethyl benzo[d]thiazole-2-carboxylates, precursor of the desired carboxylic acids. The compounds were evaluated in vitro for anti-tubercular activity against M. tuberculosis H37Rv (ATCC27294 strain). Thirty-two compounds exhibiting MIC values in the range of 0.78-6.25 μg/mL (1.9-23 μM) were subjected to cell viability test against RAW 264.7 cell lines and thirty compounds were found to be non-toxic (<50% inhibition). The most active compounds with MIC of 0.78 μg/mL (e.g., 4i, 4n, 4s, 4w, 6f, 6h, 6u, 7e, 7h, 7p, 7r and 7w) exhibit therapeutic index of 64. The structure activity relationship of the N-arylbenzo[d]thiazole-2-carboxamides has been established for anti-mycobacterial activity. Molecular docking suggests that the compounds 7w, 4i and 4n bind to the catalytic site of the enzyme ATP Phosphoribosyltransferase (HisG) and might be attributed to their anti-TB potential. These can serve as a new starting point for the development of anti-TB agents with therapeutic potential.

Knowledge Graph

Similar Paper

Benzo[d]thiazole-2-carbanilides as new anti-TB chemotypes: Design, synthesis, biological evaluation, and structure-activity relationship
European Journal of Medicinal Chemistry 2018.0
N-Arylalkylbenzo[d]thiazole-2-carboxamides as anti-mycobacterial agents: design, new methods of synthesis and biological evaluation
Med. Chem. Commun. 2014.0
Benzo[ d ]thiazol-2-yl(piperazin-1-yl)methanones as new anti-mycobacterial chemotypes: Design, synthesis, biological evaluation and 3D-QSAR studies
European Journal of Medicinal Chemistry 2016.0
Synthesis and Antitubercular Activity of New Benzo[b]thiophenes
ACS Medicinal Chemistry Letters 2016.0
Design, synthesis, andin vitrobiological evaluation of novel benzimidazole tethered allylidenehydrazinylmethylthiazole derivatives as potent inhibitors ofMycobacterium tuberculosis
MedChemComm 2018.0
Synthesis and biological evaluation of new imidazo[2,1-b][1,3,4]thiadiazole-benzimidazole derivatives
European Journal of Medicinal Chemistry 2015.0
Synthesis and antibacterial activity of 2,2'-dithiobis(benzamide) derivatives against Mycobacterium species
Journal of Medicinal Chemistry 1985.0
Synthesis and antitubercular evaluation of novel dibenzo[ b , d ]thiophene tethered imidazo[1,2- a ]pyridine-3-carboxamides
Bioorganic &amp; Medicinal Chemistry Letters 2016.0
Seeking potent anti-tubercular agents: Design, synthesis, anti-tubercular activity and docking study of various ((triazoles/indole)-piperazin-1-yl/1,4-diazepan-1-yl)benzo[d]isoxazole derivatives
Bioorganic &amp; Medicinal Chemistry Letters 2016.0
Dibenzofuran, dibenzothiophene and N-methyl carbazole tethered 2-aminothiazoles and their cinnamamides as potent inhibitors of Mycobacterium tuberculosis
Bioorganic &amp; Medicinal Chemistry Letters 2018.0