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:
Feb. 02, 2021
Filed:
Feb. 15, 2018
Bayer Cropscience Aktiengesellschaft, Monheim am Rhein, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Sergii Pazenok, Solingen, DE;
Christian Funke, Leichlingen, DE;
Friedrich August Muehlthau, Kelkheim-Fischbach, DE;
Mark James Ford, Wiesbaden-Breckenheim, DE;
Arnd Neeff, Burscheid, DE;
Klaus-Ulrich Schiffer, Wuppertal, DE;
Bayer CropScience Aktiengesellschaft, Monheim am Rhein, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The invention relates to a method for preparing methyl 4-[(4,5-dihydro-3-methoxy-4-methyl-5-oxo-1H-1,2,4-triazol-1-yl)carbonyl)sulfamoyl]-5-methylthiophene-3-carboxylate from 4-methoxycarbonyl-2-methylthiophene-3-sulfonyl chloride in the presence of an imidazole base substituted in the 1-position or in the presence of a mixture of bases comprising an imidazole base substituted in the 1-position (N-alkylimidazole).