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. 21, 1999
Filed:
Oct. 10, 1995
Applicant:
Inventor:
George Joseph Quallich, North Stonington, CT (US);
Assignee:
Pfizer Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07C / ;
U.S. Cl.
CPC ...
558289 ; 546339 ; 549401 ; 548110 ; 564 10 ; 564355 ; 568-1 ; 568808 ; 568814 ; 568878 ;
Abstract
The enantioselective borane reduction of prochiral ketones to optically pure alcohols is effectively achieved by performing the reduction in the presence of catalytic amounts of the new and valuable oxazaborolidine compounds of formulae (I) and (II). The compounds of formulae (I) and (II) may be isolated and purified prior to use in the reduction reactions or the compounds of formulae (I) and (II) may be generated in situ.