[Br:1][C:2]1[NH:6][N:5]=[C:4]([C:7]([F:10])([F:9])[F:8])[CH:3]=1.C(=O)([O-])[O-].[K+].[K+].I[CH2:18][C:19]([O:21][CH2:22][CH3:23])=[O:20]>CN(C)C=O.C(OCC)(=O)C>[Br:1][C:2]1[N:6]([CH2:18][C:19]([O:21][CH2:22][CH3:23])=[O:20])[N:5]=[C:4]([C:7]([F:10])([F:9])[F:8])[CH:3]=1A suspension of 5-bromo-3-(trifluoromethyl)-1H-pyrazole (i.e. the product of Example 11, Step B) (2.73 g, 12.7 mmol) and potassium carbonate (2.0 g, 14.5 mmol) in N,N-dimethylformamide (20 mL) was treated with ethyl iodoacetate (3.0 ml, 25.3 mmol), and the resulting mixture was stirred at 95° C. for 3 h. The resulting mixture was diluted with ethyl acetate, washed with water, and dried (MgSO4). The reaction mixture was concentrated in vacuo and further purified by medium-pressure liquid chromatography using 0-50% of ethyl acetate in hexanes as eluant to give 2.84 g of the title compound as a brown oil.
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