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:
Jan. 28, 1992
Filed:
Mar. 15, 1990
Applicant:
Inventors:
Marco Villa, Milan, IT;
Claudio Giordano, Monza, IT;
Graziano Castaldi, Briona, IT;
Silvia Cavicchioli, Costermano, IT;
Assignee:
Zambon SpA, Vicenza, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544148 ; 544377 ; 546207 ; 548526 ; 549274 ;
Abstract
A stereoconvergent process is described for preparing optically active alpha-arylalkanoic acids using as starting substance a diastereoisomeric mixture of ketals of formula ##STR1## in which the substitutents have the meanings given in the description. The described process leads to the formation of a single enantiomer.