Preparation of 4-hydroxyquinolines

Details Preparation of 4-hydroxyquinolines Preparation of 4-hydroxyquinolines

1982-01-15

1983-10-25

Rivers, Diana G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21522

Patent

active

044120761

ABSTRACT:
Process for the preparation of 4-hydroxyquinolines of the general formula: ##STR1## in which R represents a hydrogen atom, or one, two or three substituents, which may be the same or different, selected from halogen atoms, alkyl radicals containing 1 to 4 carbon atoms, alkoxy radicals containing 1 to 4 carbon atoms, and the trifluoromethyl radical, the substituent(s) being in the 2-, 3-, 5-, 6-, 7- or 8-position, by the oxidation, by means of oxygen or air, in the presence of a catalyst based on platinum or ruthenium, or alloys thereof, of a 1,2,3,4-tetrahydroquinolin-4-one of the general formula: ##STR2## in which R is as defined above.

REFERENCES:
patent: 2558211 (1951-06-01), Elderfield et al.
Elderfield et al., J. Am. Chem. Soc., vol. 71, pp. 1906-1911 (1949).
Chem. Systems Inc., Chemical Abstracts, vol. 81, 3574y (1974).

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