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:
Feb. 21, 2006
Filed:
Mar. 10, 2004
Applicants:
Franz Dietrich Klingler, Griesheim, DE;
Michael Steigerwald, Frankfurt, DE;
Richard Ehlenz, Bad Kreuznach, DE;
Inventors:
Franz Dietrich Klingler, Griesheim, DE;
Michael Steigerwald, Frankfurt, DE;
Richard Ehlenz, Bad Kreuznach, DE;
Assignee:
Boehringer Ingelheim International GmbH, Ingelheim, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D 405/12 (2006.01); C07D 309/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing the compounds of general formula Iby enantioselective hydrogenation of the compounds of formula IIin the presence of special hydrogenation catalysts. The invention is characterised by high enantioselectivity, providing easy access to a category of important pharmaceutical compositions, i.e. intermediates for the synthesis of tipranavir.