[Condensation of 3-phenyl-5-aminopyrazolo with acylpyruvic and ethoxymethylenacetic esters].

The synthesis of ethyl 2-phenyl-7-alkyl (or 7-phenyl)pyrazolo[1,5-a]pyrimidine-5-carboxylate and ethyl 2-phenyl-7-alkyl (or 7-phenyl)pyrazolo[1.5-a]pyrimidine-6-carboxylate are reported. Decarboxylation of the acids, obtained by hydrolysis of the above esters, yields the same compounds. N.M.R. data on the reduction products of the ethyl 6-carboxylate confirm all the assigned structures.