Synthesis of pyrazolo‐annelated heterocyclic ring compounds such as pyrazolo[3,4‐ b ]pyridines and pyrazolo[4′,3′:5,6]‐pyrido[2,3‐ d ]pyrimidines | Zendy

Jachak Madhukar N. | Zendy; Avhale Appasaheb B. | Zendy; Toche Ragunath B. | Zendy; Sabnis Ram W. | Zendy

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Synthesis of pyrazolo‐annelated heterocyclic ring compounds such as pyrazolo[3,4‐ b ]pyridines and pyrazolo[4′,3′:5,6]‐pyrido[2,3‐ d ]pyrimidines

Author(s) -

Jachak Madhukar N.,

Avhale Appasaheb B.,

Toche Ragunath B.,

Sabnis Ram W.

Publication year - 2007

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570440210

Subject(s) - chemistry , acetic anhydride , ring (chemistry) , methylene , pyrazole , medicinal chemistry , condensation , pyridine , bicyclic molecule , stereochemistry , organic chemistry , catalysis , physics , thermodynamics

A series of pyrazolo[3,4‐ b ]pyridines has been synthesized by Friedländer condensation of 5‐amino‐pyrazole‐4‐carbaldehyde 1 with active methylene compounds in basic medium. Pyrazolo[4′3′:5,6]pyrido‐[2,3‐ d ]pyrimidines have been synthesized from pyrazolo[3,4‐ b ]pyridines using substituted urea and acetic anhydride.

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