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:
Oct. 13, 1998
Filed:
Jun. 18, 1997
Applicant:
Inventors:
Stefan Krause, Sulzbach/Ts., DE;
Doris Neumann-Grimm, Frankfurt, DE;
Theodor Papenfuhs, Frankfurt, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562456 ;
Abstract
The present invention relates to a process for the preparation of N-(2-carboxy-5-chloro-phenyl)glycine of the formula (1) ##STR1## which comprises reacting 2,4-dichlorobenzoic acid of the formula (2) ##STR2## with glycine and a base in water at a temperature of 50.degree. to 200.degree. C. in the presence of copper and oxygen at a pH of 7 to 13.