Journal of Heterocyclic Chemistry p. 333 - 338 (1998)
Update date:2022-08-03
Topics:
Quiroga
Insuasty
Cruz
Hernandez
Bolanos
Moreno
Honnaza, Angelina
De Almeida, S. Regina H.
Several new pyrazolo[3,4-b]pyridines were obtained from the reaction of 5-amino-1-aryl-3-methylpyrazoles 1 with β-dimethylaminopropiophenones 2 in pyridine. The structure elucidation of 4,5-dihydropyrazolo[3,4-b]pyridines 3 is based on nmr measurements and X-ray diffraction. The treatment of compounds 3 with N-bromosuccinimide led to the formation of pyrazolo[3,4- b]pyridines 4.
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