Process for the preparation of trifluoromethylated aromatic compounds
AssigneeRohm and Haas Company
InventorThomas R. Opie
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Abstract
This invention relates to a novel process for the direct trifluoromethylation of aromatic compounds via carbon tetrachloride and hydrogen fluoride in the presence of strong Bronsted or Lewis acids which give an acidic reaction (increase in concentration of H.sub.2 F.sup.+ ions) in anhydrous hydrogen fluoride.
Claims14
A process for the preparation of mono-trifluoromethylated aromatic compounds which comprises reacting an aromatic comound with carbon tetrahalide in the presence of a strong Bronsted or Lewis acid in anhydrous hydrogen fluoride at temperatures from about -20.degree. C. to about 300.degree. C. under pressures from about 10 millimeters to about 3,000 psig wherein the catalyst to carbon tetrahalide to aromatic compound to hydrogen fluoride molar ratios are in the range of from about 0.01/0.2/1.0/0.6 to about 5/10/1/100.
Dependencies are inferred from the claim text.