New Synthesis of Some Isoxazole Derivatives and Their Antioxidant Properties

A series of substituted ethyl 5-phenyl-1,2-oxazole-3-carboxylates were synthesized in good to excellent yields in one step using hydroxylamine base and ethyl 2,4-dioxo-4-(4-R-phenyl)butanoates bearing both electron-donating and electron-withdrawing moieties on the benzene ring, and antioxidant properties of the products were investigated by the DPPH method. The proposed method is suitable for the large-scale production of isoxazole derivatives.