641571-13-3

641571-12-2

641571-13-3

The general steps for the synthesis of 3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzoic acid by nitrile hydrolysis reaction using 3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzonitrile as raw material were as follows: General method: standard operating procedure for nitrile hydrolysis: 1. dissolve 3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzoic acid nitrile in dioxane to prepare a 0.13 M solution. 2. aqueous NaOH solution (10 equiv. at a concentration of 1 g/L) was added to the above solution. 3. The reaction mixture was heated to reflux and the reaction was continued overnight. 4. Upon completion of the reaction, the dioxane solvent was removed by evaporation. 5. 5. The remaining aqueous phase was washed with ethyl acetate (AcOEt). 6. The aqueous phase was acidified with 2N HCl and extracted again with ethyl acetate (AcOEt). 7. The organic layers were combined and dried over anhydrous sodium sulfate (Na2SO4). 8. The desiccant was removed by filtration and the filtrate was concentrated to give the target product 3-(4-methylimidazol-1-yl)-5-trifluoromethylbenzoic acid.