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:
Apr. 20, 1999
Filed:
Dec. 12, 1997
Vidyanatha A Prasad, Leawood, KS (US);
Peter E Newallis, Leawood, KS (US);
Daniel M Wasleski, Raytown, MO (US);
Jacqueline M Applegate, Parkville, MO (US);
Klaus Jelich, Overland Park, KS (US);
Bayer Corporation, Pittsburgh, PA (US);
Abstract
The present invention relates to a process for making N-(4-fluorophenyl)-N-(1-methylethyl)-2-�(5-trifluoromethyl)-1,3,4-thiadiaz ol-2-yl)oxy!acetamide in an aprotic, aromatic solvent. The process includes the steps of: (a) reacting 2-(methylsulfonyl)-5-(trifluoromethyl)-1,3,4-thiadiazole with N-(4-fluorophenyl)-2-hydroxy-N-(1-methylethyl)acetamide in the presence of an aprotic, aromatic solvent to form an aqueous phase and an organic phase; (b) acidifying the phases, (c) separating the phases; and (d) recovering the N-(4-fluorophenyl)-N-(1-methylethyl)-2-�(5-trifluoromethyl)-1,3,4-thiadiaz ol-2-yl)oxy!acetamide from the organic phase.