REACTIONS OF 3-AROYLACRYLATES WITH α-AMINOAZOLES
DOI:
https://doi.org/10.1007/1416Keywords:
3-amino-1, 2, 4-triazole, 5-aminopyrazole, 6-arylpyridazin-3(2H)-ones, dihydropyrazolo[3, 4-b]pyridines, dihydropyrazolo[1, 5-a]pyrimidines, dihydro[1, 4]triazolo[1, 3-aroylacrylic acids esters, cyclocondensationAbstract
Dihydro derivatives of pyrazolo[3,4-b]pyridine-, pyrazolo[1,5-a]pyrimidine-, and [1,2,4]triazolo[1,5-a]pyrimidinecarboxylates have been prepared by cyclocondensation of β-aroylacrylates with 5-aminopyrazoles and 3-amino-1,2,4-triazole. Heating dihydro[1,2,4]triazolo[1,5-a]pyrimidine-7-carboxylates with hydrazine hydrate led to recyclization of the pyrimidine ring to form 6-arylpyridazin-3(2H)-ones.
Authors: N. N. Kolos, L. U. Kovalenko, and V. A. Borovskoy.
English translation in Chemistry of Heterocyclic Compounds, 2011, 47 (8), pp 983-988