About the structure of two isomeric pyrazoloquinolines |
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Authors: | J. Prime,B. Stanovnik,M. Ti ler |
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Affiliation: | J. Prime,B. Stanovnik,M. Tišler |
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Abstract: | 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 1H-pyrazolo-[3,4-f]quinoline ( 4 ) and 3H-pyrazolo[4,3-f]quinoline ( 2 ). |
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