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The title compounds, substituted 1 H -benzo[f]chromen-3-yl-2 H -chromen-2-ones were obtained by reacting 3-aryl-1-(3-coumarinyl)propen-1-ones with 2-napthol catalyzed by DBU (1,8-diazabicyclo[5,4,0]undec-7-ene) and concentrated H 2 SO 4 in ample yields. Their structures were characterized by IR, 1 H NMR, 13 C NMR, mass spectral and elemental analysis. All the synthesized compounds have been evaluated for their in-vitro antibacterial activity against Escherichia coli , Staphylococcus aureus , and Pseudomonas aeruginosa and antifungal activity against Aspergillus Niger and Candida albicans by using serial broth dilution method. Among those compounds 3 band 3c exhibits prominent results.

One pot synthesis of substituted 1H-benzo[f]chromen-3-yl-2H-chromen-2-one derivatives