A series of novel [1,2,3]-triazolyl substituted benzo [c] coumarins have been synthesized by reacting various 3-coumarinoyl methyl pyridinium bromide salts with 1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl) ethanones in the presence of sodium acetate in refluxing acetic acid. The structures of the synthesized compounds have been elucidated by IR, 1H-NMR, 13C-NMR and Mass spectral data. All the synthesized compounds have been screened for their invitro anti-bacterial and anti-fungal activities. Some of the compounds have been found to be active against some bacterial and fungal pathogens compared to standard drugs.

Abstract.A series of novel [1,2,3]-triazolyl substituted benzo[c]coumarins have been synthesized by reacting various 3-coumarinoyl methyl pyridinium bromide salts with 1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)ethanones in the presence of sodium acetate in refluxing acetic acid. The structures of the synthesized compounds have been elucidated by IR, 1 H-NMR, 13 C-NMR and Mass spectral data. All the synthesized compounds have been screened for their in vitro anti-bacterial and anti-fungal activities. Some of the compounds have been found to be active against some bacterial and fungal pathogens compared to standard drugs.

In the present study, a series of pyrazolyl pyridyl substituted dicoumarins has been synthesized.