0.35 g of 4-acetyl-2-methylbenzoic acid amide, 0.49 g of 3′,5′-dichloro-2,2,2-trifluoroacetophenone, 2.96 g of distilled water, 83 mg of potassium carbonate and 13 mg of sodium laurate were fed and the mixture was stirred for 5.5 hours at 70° C. The mixture was left to cool to room temperature and the slurry-state reaction solution was filtered under reduced pressure, and the solid was washed with a small amount of distilled water. 0.71 g of 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluoro-3-hydroxybutanoyl)-2-methylbenzoic acid amide as a flesh color solid was obtained by drying under reduced pressure.
