CC1[N:3]([C:8]2[CH:12]=[C:11]([I:13])[N:10]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[N:9]=2)C(C)=CC=1.[Cl-].O[NH3+].C(N(CC)CC)C>CCCCCC.C(OCC)(=O)C>[F:20][C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][C:14]=1[N:10]1[C:11]([I:13])=[CH:12][C:8]([NH2:3])=[N:9]1To a solution of 3-(2,5-dimethylpyrrol-1-yl)-1-(2-fluorophenyl)-5-iodo-1H-pyrazole (1.23 g) in ethanol/water (2/1, 18 ml) were sequentially added hydroxylammonium chloride (4.47 g) and triethylamine (0.9 ml) at room temperature, and the mixture was stirred at 90° C. for 24 hours. This reaction mixture was cooled to room temperature, concentrated under reduced pressure. To the resulting residue was added a 8M aqueous solution of sodium hydroxide, and then the mixture was extracted with ethyl acetate. This organic layer was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=4/1 to 1/1) to give the titled compound (0.61 g).
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