A process for making...

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 285/13 (2006.01) C07D 285/12 (2006.01)

Patent

CA 2254625

The present invention relates to a process for making N-(4-fluorophenyl)-N-(1-methylethyl)-2-[(5-trifluoromethyl)-1,3,4-thiadiazol-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-thiadiazol-2-yl)oxy]acetamide from the organic phase.

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