[NH2:1][C:2]1[N:7]=[C:6]([O:8][CH3:9])[CH:5]=[C:4]([O:10][CH3:11])[N:3]=1.C(=O)([O-])[O-].[K+].[K+].[F:18][C:19](=[C:24]([F:26])[F:25])[CH2:20][C:21](Cl)=[O:22]>ClCCl.O>[F:18][C:19](=[C:24]([F:26])[F:25])[CH2:20][C:21]([NH:1][C:2]1[N:3]=[C:4]([O:10][CH3:11])[CH:5]=[C:6]([O:8][CH3:9])[N:7]=1)=[O:22]
To an ice-cooled stirred suspension of 2-amino-4,6-dimethoxypyrimidine (1.55 g, 10 mmol) in dichloromethane (50 mL) and potassium carbonate (2.76 g, 20 mmol) in water (20 mL) was added 3,4,4-trifluoro-3-butenoyl chloride (3.17 g, 20 mmol). The reaction mixture was stirred in cold for 10 min and at r.t. for 15 min. The organic layer was washed with 3N HCl (2×25 mL), saturated sodium bicarbonate (25 mL) and brine, and dried. Evaporation of the solvent gave 0.296 g (10%) of the title compound as a white solid. m.p. 127°-130° C.
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