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Study of the structures of indazoles, pyrazolo [3,4-b] pyridines, and pyrazolo[3,4-b]pyrazine by IR spectroscopy

✍ Scribed by L. V. Sennitskaya; Yu. D. Timoshenkova; B. S. Kikot'; Yu. A. Pentin; F. F. Blanko; I. A. Korbukh; M. N. Preobrazhenskaya


Book ID
112327516
Publisher
Springer US
Year
1977
Tongue
English
Weight
443 KB
Volume
13
Category
Article
ISSN
0009-3122

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Convenient synthesis of pyrazolo[3,4-b]p
✍ Chtiba Samar; Jemmezi FayΓ§el; Khiari Jameleddine πŸ“‚ Article πŸ“… 2011 πŸ› Elsevier Science 🌐 French βš– 255 KB

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.