Synthesis of new compounds containing the pyrazolo[3,4-b]pyridine-3-one subunit
✍ Scribed by S. Fadel; F. Suzenet; A. Hafid; E. M. Rakib; M. Khouili; M. D. Pujol; G. Guillaumet
- Book ID
- 102342022
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2009
- Tongue
- English
- Weight
- 121 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0022-152X
- DOI
- 10.1002/jhet.199
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✦ Synopsis
Abstract
magnified image 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 were functionalized at 1‐, 4‐, or 6‐ position by different pharmacophore entities allowing the synthesis of new compounds with promising biological activities. J. Heterocyclic Chem., (2009).
📜 SIMILAR VOLUMES
An expedient method for the synthesis of 2-phenyl-5-aryl-2,3-dihydropyrazolo [3,4-b]pyridin-3-ones and 2-phenyl-3-oxo-2,3-dihydropyrazolo[3,4-b]pyridine-5-carbaldehyde in a single-step via condensation of vinamidinium salts with 3-amino-1-phenyl-2-pyrazolin-5-one is described.
## Abstract Cyclocondensation of cyanoacetamide and cyanothioacetamide with sodium salt of 3‐hydroxy‐1‐(pyridin‐3‐yl)prop‐2‐en‐1‐one gave 6‐oxo‐[2,3′]bipyridine **5a** and 6‐thioxo‐[2,3′]bipyridine **5b** derivatives, respectively. Compound **5b** upon treatment with different methylenes **8** gave
## Abstract While 3(5)‐aminopyrazole reacts with enaminonitrile to yield pyrazolo[1,5‐__a__]pyrimidines, 3‐amino‐5‐pyrazolone reacts with the same reagents to yields pyrazolo[3,4‐__b__]pyridines.