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. 06, 1998
Filed:
Oct. 12, 1995
Applicant:
Inventors:
Anuschirwan Peyman, Kelkheim, DE;
Dieter Bernd Reuschling, Butzbach, DE;
Adolf Heinz Linkies, Frankfurt, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
546290 ; 546301 ; 546302 ; 546303 ;
Abstract
A process for the preparation of 1-hydroxy-2-pyridones is described in which a pyrone is reacted with a hydroxyl-ammonium salt in the presence of basic compounds, solvents and organic acids or salts thereof.