[Cl:1][C:2]1[CH:3]=[C:4]([C:9](O)([C:23]([F:26])([F:25])[F:24])[CH2:10][C:11]([C:13]2[CH:21]=[CH:20][C:16]([C:17]([NH2:19])=[O:18])=[C:15]([CH3:22])[CH:14]=2)=[O:12])[CH:5]=[C:6]([Cl:8])[CH:7]=1.C1(C)C=CC=CC=1.C(OC(=O)C)(=O)C.C(N(CC)CC)C>CN(C)C1C=CN=CC=1.Cl.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]([C:23]([F:26])([F:24])[F:25])=[CH:10][C:11]([C:13]2[CH:21]=[CH:20][C:16]([C:17]([NH2:19])=[O:18])=[C:15]([CH3:22])[CH:14]=2)=[O:12])[CH:5]=[C:6]([Cl:8])[CH:7]=10.48 g of 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluoro-3-hydroxybutanoyl)-2-methylbenzoic acid amide, 1.5 g of toluene, 0.23 g of acetic anhydride, 27 mg of 4-dimethylaminopyridine and 0.23 g of triethylamine were fed and the mixture was stirred for 2.5 hours at 30° C. 2 ml of iced water and 2 drops of concentrated hydrochloric acid were added to the reaction solution, and the deposited solid was collected by filtration. The solid was washed with a small amount of toluene and distilled water, and dried under reduced pressure. 0.32 g of 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluoro-2-butenoyl)-2-methylbenzoic acid amide was obtained as a flesh color solid.
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