Abstract
A series of bioactive 3H,7H,8H,11H-9-[(5″-(6′-methyl-2-oxo-2H-[1]-4′-benzopyranoxy)-2″,4″-dihydro-[1″,2″,4″]-triazol-3″-one)methyl]-3,8,11-trioxo-dipyrano[2,3-f;2,3-c]quinoline (4) and 3H,7H,8H,11H-9-[(2′-(3″-phenyl-thiazolidin-4″-one)-phenoxymethyl]-3,8,11-trioxo-dipyrano[2,3-f;2,3-c]quinoline (7) analogs of 3H,7H,8H,11H-9-bromomethyl-3,8,11-trioxo-dipyrano[2,3-f;2,3-c]quinoline (1) have been synthesized and evaluated for their antibacterial activity against Gram-positive bacteria (S. aureus) and Gram-negative bacteria (S. typhi and E. coli). Pyranoquinolines with triazole and thiazolidine moieties exhibited promising antibacterial activity. The structures of all synthesised compounds were confirmed on the basis of analytical and spectral data.
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