Abstract
Fusion of methyl 4-(2-thienyl)-2,4-dioxobutanoate with 1H-tetrazol-5-amine monohydrate and aromatic aldehyde gave methyl 7-aryl-6-(2-thenoyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-5-carboxylates which reacted with an equimolar amount of hydrazine hydrate at 180–190°C under solvent-free conditions to produce 9-aryl-8-(2-thienyl)-4,9-dihydrotetrazolo[1′,5′: 1,2]pyrimido[4,5-d]pyridazin-5(6H)-ones.
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Original Russian Text © V.L. Gein, V.V. Mishunin, E.P. Tsyplyakova, M.I. Vakhrin, P.A. Slepukhin, 2011, published in Zhurnal Organicheskoi Khimii, 2011, Vol. 47, No. 7, pp. 1060–1064.
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Gein, V.L., Mishunin, V.V., Tsyplyakova, E.P. et al. Synthesis of methyl 7-aryl-6-(2-thenoyl)-4,7-dihydro-tetrazolo[1,5-a]pyrimidine-5-carboxylates and their reaction with hydrazine hydrate. Russ J Org Chem 47, 1077–1082 (2011). https://doi.org/10.1134/S1070428011070189
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DOI: https://doi.org/10.1134/S1070428011070189