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:
Nov. 02, 1999
Filed:
Dec. 22, 1997
Applicant:
Inventors:
Reinhard Lantzsch, Wuppertal, DE;
Rainer Fuchs, Wuppertal, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570185 ; 570182 ; 570193 ;
Abstract
The invention relates to novel processes for the preparation of phenyl acetic acid derivatives of the formula (I) some of which are known ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently of each other each represent hydrogen, alkyl or alkoxy by ozonolysis of compounds of the formula (II) ##STR2## in which R.sup.4 represents hydrogen or methyl and oxidation of the reaction products obtained therefrom. The invention further relates to novel intermediates and a process for the preparation thereof.