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:
May. 09, 2006
Filed:
Dec. 03, 2003
Applicants:
Burkhard Jaeger, Bingen, DE;
Markus Sauter, Gensingen, DE;
Juergen Schroeder, Mainz, DE;
Inventors:
Assignee:
Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 69/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing optically active 5-hydroxy-3-ketoesters of formula A1 or A2, or one of the tautomers thereof,the use thereof for preparing optically active dihydropyrones of formula B, and the use of the dihydropyrones of formula B thus prepared as starting compounds for preparing pharmaceutically active compounds, particularly Tipranavir.