Synthesis, Antiradical and Anticholinesterase Аctivity of Kетоamides of N-Substituted α,β-Dehydroamino Acids and Corresponding Imidazol-4-ones

A series of N -substituted α,β-dehydroamino acids N -benzoylmethylamides was prepared starting from substituted 2-phenyl-4-benzylidene-5-oxazolones. The ketoamides were used to the synthesis of substituted 4-imidazolones in the presence of 1,1,1,3,3,3-hexamethyldisilazane as a dehydrating agent. The corresponding amido alcohol was obtained by reduction of ( Z )- N -{3-oxo-3-[(2-oxo-2-phenylethyl)amino]-1-phenylprop-1-en-2-yl}benzamide by sodium borohydride, and diazine was obtained by its reaction with hydrazine. Antiradical and anticholinesterase properties of the synthesized compounds were studied.