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:
Dec. 04, 2001
Filed:
Oct. 30, 2000
Applicant:
Inventors:
Carsten Bolm, Aachem, DE;
Arne Gerlach, Aachen, DE;
Karlheinz Drauz, Freigericht, DE;
Andreas Bommarius, Frankfurt, DE;
Assignee:
Degussa AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 6/500 ; C07D / ;
U.S. Cl.
CPC ...
C08G 6/500 ; C07D / ;
Abstract
It is known that dihydroquinine or dihydroquinidine derivatives can be successfully used as ligands in the enantioselective dihydroxylation. The new disclosed ligand systems based on dihydroquinine/quinidine, unlike the prior art ligands, can be recycled after enantioselective dihydroxylation by precipitating and filtering the reaction medium, and be reused in the reaction medium. Also disclosed are the ligand systems (I) and (IV), process for preparing the same and their use in the enantioselective dihydroxiation of double bonds.