Method of preparing octahydro-1H(and 2H)-pyrazolo[3,4-g]quinolin

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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546164, C07D48704

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active

045672660

ABSTRACT:
A 1-substituted-3-permissibly-substituted-6 (or 7)-oxodecahydroquinoline is converted to the corresponding 7 (or 6)-formyl derivative. The 6-oxo-7-formyl compound, upon treatment with hydrazine, is cyclized to a tautomeric mixture of 5-substituted-7-permissibly-substituted-4,4a,5,6,7,8,8a,9-octahydro-1H(and 2H)-pyrazolo[3,4-g]quinolines.

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Fieser, L. et al., Reagents for Organic Synthesis, John Wiley, New York, 1967, pp. 380-381.
Chemical Abstracts, 78:136273j (1973), [Ger. Offen. 2,141,700, 2/22/73].
Jacobs, T. in Heterocyclic Compounds, vol. 5 (Elderfield, Editor), John Wiley, New York, 1957, pp. 48-49.
Bach et al., J. Med. Chem., 23, 481 (1980).
Johnson et al., J. Org. Chem., 33, 3207 (1968).
Fieser and Fieser, Reagents for Organic Synthesis, vol. 7, Wiley-Interscience, New York, 1979, p. 411.

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