[F:1][C:2]([F:18])([F:17])[CH2:3][C:4]([NH:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][C:8]=1[CH:15]=O)=[O:5].C([O-])([O-])=O.[K+].[K+]>CN(C=O)C.CCOC(C)=O>[CH3:14][O:13][C:10]1[CH:9]=[C:8]2[C:7](=[CH:12][CH:11]=1)[NH:6][C:4](=[O:5])[C:3]([C:2]([F:18])([F:17])[F:1])=[CH:15]2To a solution of 3,3,3-trifluoro-N-(2-formyl-4-methoxyphenyl)propanamide (5.30 g, 20.3 mmol) in DMF (100 mL) was added K2CO3 (14.0 g, 101 mmol). The mixture was heated to 60° C. for 1.5 hours. The mixture was diluted with EtOAc (200 mL) and filtered off. The filtrate was washed with H2O (100 mL) and brine (100 mL), dried over Na2SO4, and concentrated in vacuo to give the desired product (4.60 g, yield 94%). 1H NMR (CDCl3 300 MHz): δ 12.25 (brs, 1H), 8.18 (s, 1H), 7.40 (d, J=9.0 Hz, 1H), 7.25 (dd, J=9.0, 2.7 Hz, 1H), 7.02 (d, J=2.7 Hz, 1H), 3.87 (s, 3H).
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