The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1983
Filed:
Jan. 15, 1982
Applicant:
Inventors:
Michel Baudouin, St. Fons, FR;
Daniel Michelet, Tassin, FR;
Assignee:
Rhone-Poulenc Sante, Courbevoi, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546153 ;
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.