Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
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).
Baudouin Michel
Michelet Daniel
Rhone-Poulenc Sante
Rivers Diana G.
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