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. 15, 2002
Filed:
Mar. 23, 2001
Applicant:
Inventors:
Taun-Phat Dang, Lyons, FR;
Alain Roustan, Saint Genis Laval, FR;
Assignee:
Rhodia Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
C07D / ; C07D / ;
Abstract
The 4-hydroxyquinoline compounds and/or tautomers thereof, notably 4-hydroxy-5,7-dichchloroquinoline, are synthesized in very high yields by hydrolyzing/decarboxylating a 4-hydroxyquinolinecarboxylic acid ester in the presence of water, whether in liquid or vapor state, but in the absence of any catalyst for such reaction(s).