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:
Mar. 11, 1997
Filed:
Jul. 13, 1995
Applicant:
Inventors:
Assignee:
Lonza Ltd., Gampel/Valais, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ; B01J / ;
U.S. Cl.
CPC ...
5483031 ; 502213 ;
Abstract
A process for the asymmetric hydrogenation of the furoimidazole derivatives of the general formula: ##STR1## wherein R.sub.1 is a protective group, which is cleavable in a known way, and R.sub.2 is hydrogen or a protective group, which is cleavable in a known way, with hydrogen in the presence of a homogeneous catalyst to the corresponding diastereomeric tetrahydrofuroimidazole derivatives of the general formula: ##STR2## The tetrahydrofuroimidazole derivatives of the general formula II are intermediate products for the production of vitamin (+) biotin.