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About the structure of two isomeric pyrazoloquinolines
Author(s) -
Prime J.,
Stanovnik B.,
Tišler M.
Publication year - 1976
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.5570130443
Subject(s) - chemistry , quinoline , reagent , stereochemistry , computational chemistry , crystallography , organic chemistry
Several structures are possible for the pyrazoloquinolines, formed in the Skraup synthesis from 5‐ or 6‐aminoindazole. By nmr spectroscopic examination in the presence of shift reagents it was possible to assign the correct structures for both products, i.e. , the angular 1 H ‐pyrazolo‐[3,4‐ f ]quinoline ( 4 ) and 3 H ‐pyrazolo[4,3‐ f ]quinoline ( 2 ).