3-Formylchromones IV. The Rearrangement of 3-Formylchromone Enamines as a Simple, Facile Route to Novel Pyrazolo[3,4-b]pyridines and the Synthetic Utility of the Latter

3-Formylchromones IV. The Rearrangement of 3-Formylchromone Enamines as a Simple, Facile Route to Novel Pyrazolo[3,4-b]pyridines and the Synthetic Utility of the Latter

One-pot and facile preparations of 6-(2-hydroxy-5-R-benzoyl)-4-methyl-2-R1- pyrazolo[3,4-b]pyridines 4a-o are described, using the reaction of 3-formyl chromones 1 with 5-amino-1-R1-pyrazoles 2. An enamine-intermediate 2-ethyloxy-6-R-3-(3-methyl-1- phenylpyrazol-5-ylaminomethylene)chroman-4-one 3 wa...

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Bibliographic Details
Main Authors: D. Rasala, J. Chovancova, P. Kois, J. Lac, E. Solcanyova, A. Puchala, M. Lacova
Format: Article
Language:English
Published: MDPI AG 2005-08-01
Series:Molecules
Subjects:
4-Oxo-4H[1]benzopyrane
Coumarin
Pyrazole
Rearrangement
Enamine
Microwave irradiation
Online Access:http://www.mdpi.com/1420-3049/10/7/809/

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