Synthesis of Some New Substituted 1,3,4–Oxadiazoles and the study of their Biological Activity

الملخص

Substituted 1,3,4-oxadiazoles are well known as biological active agents.
Several compounds of this group were synthesized by using coumarin derivatives as
starting material The structures of the new compounds were established on bases of
elemental analysis, physical and spectral data.