Heterocyclic Communications p. 47 - 54 (2002)
Update date:2022-08-05
Topics: Heteroaromatic Tetracyclic 3H
De Azevedo, Alexandre Reis
Frugulhetti, Izabel C.P.P.
Khan, Misbahul Ain
Khakwani, Samia
Bernardino, Alice M. Rolim
Various derivatives of the tetracyclic ring system 3H-Benzo[b]pyrazolo[3,4-h]-1,6-naphthyridine were prepared from 4-anilino-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acids by intramolecular cyclization employing phophoryl chloride. 1H NMR spectra of the various derivatives were recorder.
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