Condensation of 2-pyrone with 3-aminopyrazolone. A novel synthesis of pyrazolo[3,4-b]pyridines
A simple route to the preparation of new heterocyclic systems: pyrazolo [3,4-b] pyridines from the easily available 2-pyrone and 3-aminopyrazolone. The structure of the compounds and the mechanism of their formation are reported.
Synthesis of new pyrazolo[3,4-b]pyridin-3-ones and pyrazolo[1,5-a] pyrimidin-2(1H)-one and study of the pyrazolic nitrogen reactivity
A convenient route to the synthesis of pyrazolo[3,4-b]pyridin-3-one and pyrazolo[1,5-a]pyrimidin-2(1H)-one via condensation of 3-amino-1- phenylpyrazolin-5-one with 2-pyrone derivatives followed by the alkylation of prepared compounds is described. Severa
Synthesis of new compounds containing the pyrazolo[3,4-b]pyridine-3-one subunit
(Chemical Equation Presented) A convenient route for the synthesis of pyrazolo[3,4-b]pyridine-3-ones via condensation of 3-amino-1-phenylpyrazolin-5- one with 4-hydroxy-6-methylpyran-2-one is described. The pyrazolo[3,4-b] pyridine-3-one isomers obtained