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. 09, 1986
Filed:
Jun. 27, 1984
Applicant:
Inventors:
Erwin Schmidt, Kelkheim, DE;
Dieter Gunther, Kelkheim, DE;
Klaus-Dieter Kampe, Bad Sodem am Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 13 ; 560 12 ; 560150 ; 564 87 ; 564 88 ; 564 95 ;
Abstract
The invention relates to new 2-ketosulfonamides of the formula ##STR1## and to a process for their preparation, wherein the 3-amino-2-sulfamoylalk-2-enoic acid esters of the formula ##STR2## obtained by reacting 3-aminoalk-2-enoic acid esters of the formula ##STR3## with amidosulfonyl chlorides of the formula X-SO.sub.2 -NH-R.sup.2, are subjected to hydrolysis and decarboxylation. The invention also relates to the 3-amino-2-sulfamoylalk-2-enoic acid esters which can be isolated as intermediates.