Reaction of 2-(ethoxymethylidene)-3-oxo carboxylic acid esters with tetrazol-5-amine
作者:M. V. Goryaeva、Ya. V. Burgart、M. A. Ezhikova、M. I. Kodess、V. I. Saloutin
DOI:10.1134/s1070428015070179
日期:2015.7
2-(Ethoxymethylidene)-3-oxo carboxylic acid esters reacted with tetrazol-5-amine to give ethyl 4-alkyl-2-azidopyrimidine-5-carboxylates capable of undergoing subsequent nucleophilic substitution of hydrogen on C-6 or azido group. The reaction of ethyl 2-benzoyl-3-ethoxyprop-2-enoate with tetrazol-5-amine was accompanied by partial decomposition to afford a mixture of ethyl 3-oxo-3-phenylpropanoate and ethyl 7-(1-ethoxy-1,3-dioxo-3-phenylpropan-2-yl)-5-phenyl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylate. Ethyl 7-hydroxytetrazolo[1,5-a]pyrimidine-6-carboxylate was formed as a result of cyclization of diethyl 2-(ethoxymethylidene)propanedioate with tetrazol-5-amine.