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. 11, 1990
Filed:
Nov. 20, 1989
Applicant:
Inventors:
Gunther Wess, Erlensee, DE;
Kurt Kesseler, Bad Soden am Taunus, DE;
Ekkehard Baader, Konigstein/Taunus, DE;
Gerhard Beck, Frankfurt am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
549274 ; 549333 ; 549369 ; 549375 ; 544335 ; 546268 ; 546341 ;
Abstract
A process for the preparation of optically active 3-demethylmevalonic acid derivatives of the formula I ##STR1## (3,5-dihydroxy carboxylic acid derivatives) or of the formula II ##STR2## in which R, R.sup.1 and Y have the indicated meanings, is described. The invention furthermore relates to aldehydes of the formula XII ##STR3## in which M represents the indicated protective groups.