Poojali P. Warekar, Priyanka T. Patil, K. Patil
Jan 27, 2017
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Quality indicators
Journal
Research on Chemical Intermediates
Abstract
A highly efficient protocol for the synthesis of 1,2-bis(4-nitrophenyl)-1H-benzo[f]chromen-3-amine derivative has been illustrated by a one-pot three-component reaction of aromatic aldehydes, 4-nitrophenyl acetonitrile and β-naphthol by using p-toluenesulfonic acid (PTSA) as the catalyst. PTSA is a mild, efficient, inexpensive Lewis acid catalyst which smoothly catalyzes the reaction. The synthesized compounds were predicted on the basis of IR, H1NMR, C13NMR and mass analysis data. The entire synthesized compounds (B-1–B-11) were evaluated for their in vitro antitubercular activity against Mycobacterium tuberculosis H37RV strain using microplate Alamar blue assay, which shows promising results and activity expressed as MIC in µg/ml. The results indicate that most of the compounds exhibit comparable activity with standards pyrazinamide, streptomycin and ciprofloxacin against M. tuberculosis. Compound B-11 showed the best result with MIC 1.6 µg/ml, compared with the standard used, which is the main scientific finding of this new series of chromene-based compounds.Graphical Abstract