Antifungal Activity.

Coumarins are the family of benzopyrones, in which benzene ring amalgamated with the pyrone ring. Their versatile oxygen-containing heterocyclic structure and physicochemical characteristics are responsible to attract great attention from medicinal chemists and pharmacologists and for being a privileged scaffold in medicinal chemistry. In this study, 1, 3, 4 -oxadiazole incorporated a series of new coumarin derivatives have been synthesized. Structures of the newly synthesized compounds were established on the basis of FT-IR, 1H NMR spectroscopic techniques and elemental analysis. The synthesized compounds were screened for their in vitro antifungal activity against five pathogenic fungal strains: Aspergillus niger, Penicillium notatum, Saccharomyces cerevisiae, Penicillium chrysogenum and Neurospora crassa by disk-diffusion method. All the compounds were found to have significant antifungal activity against all the fungal strains.

A novel series of eleven novel 4-(2, 3-dihydro-4H-1,4-benzoxazin-4-yl)-3-fluoroaniline derivatives (I e – I o) have been synthesized from commercially available 2-aminophenol as a starting material. High yield and high purity indicates lack of side reaction and by product. The chemical structures of the synthesized compounds were confirmed by means of 1HNMR and mass spectral data. The synthesized compounds were then examined for their antibacterial and antifungal activities. Some of them were found to possess good antibacterial and antifungal activity.