A facile route to pyrazolo[3,4-b]pyridines and [1]benzopyranoh'[4,3,e]pyrazolo[3,4-b]pyridines

Sabitha, Gowravaram ; Srividya, R. ; Archana, B. ; Yadav, J. S. (1999) A facile route to pyrazolo[3,4-b]pyridines and [1]benzopyranoh'[4,3,e]pyrazolo[3,4-b]pyridines Synthetic Communications, 29 (4). pp. 655-665. ISSN 0039-7911

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0039791...

Related URL: http://dx.doi.org/10.1080/00397919908085814


A direct synthesis of pyrazolo[3,4-b]pyridines [5 & 6] and [l]benzopyrano[4',3'-e]pyrazolo[3,4-b]pyridines (7) is described by Friedlander condensation. An alternative and a short route for the preparation of [l]benzopyrano[4',3'-e]pyrazolo[3,4-b]pyridines (7) is also reported.

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