Bromination of (diethoxyphosphorylmethyl)acetylfurans with dioxane dibromide\t\t\t\t\tin the mixture of chloroform and acetic acid in presence of traces of hydrogen\t\t\t\t\tbromide at room temperature proceeds selectively at the methyl group of ketone\t\t\t\t\tdoes not involving phosphonate group. Obtained bromoacetyl derivatives were used\t\t\t\t\tfor alkylation of acetoacetic ester and cyclohexan-1,3-dione. Reaction of\t\t\t\t\t1,4-diketone prepared from acetoacetic ester with hydrazine hydrate in ethanol\t\t\t\t\tat room temperature leads to formation of furylpyrazines due to aromatization of\t\t\t\t\tintermediate azines by means of air oxygen.