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:
Jul. 27, 1993
Filed:
Mar. 18, 1991
Applicant:
Inventors:
Winfried Hertzsch, Frankfurt am Main, DE;
Gerhard Jahne, Frankfurt am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
560263 ; 560107 ; 560104 ; 560106 ; 560112 ; 560227 ; 560231 ; 560254 ; 560261 ; 560265 ; 560266 ; 564201 ; 564208 ; 564503 ; 568 56 ; 568 57 ;
Abstract
Compounds of the formula ##STR1## can advantageously be prepared by reacting compounds the formula II ##STR2## in which the substituents R.sup.1 -R.sup.4 have the meanings given, with the anhydride of the formula III ##STR3## in the presence of dimethyl sulfoxide and the acid corresponding to the anhydride of the formula III.