S. I. Filimonov, M. Korsakov, Zh. V. Chirkova
Sep 26, 2013
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Journal
Chemistry of Heterocyclic Compounds
Abstract
Substituted 5-amino-4-arylpyrazoles on condensation with itaconic acid form substituted tetrahydropyrazolo[1,5-a]pyrimidines, and on condensation with maleic anhydride form 2,3-dihydro-1H-imidazolo[1,2-b]pyrazoles, which on more extended heating rearrange into tetrahydro-pyrazolo[1,5-a]pyrimidines.