[F:1][C:2]1[C:3]([CH2:8]O)=[N:4][N:5]([CH3:7])[CH:6]=1.S(Cl)([Cl:12])=O>C(Cl)Cl>[Cl:12][CH2:8][C:3]1[C:2]([F:1])=[CH:6][N:5]([CH3:7])[N:4]=1To a 25 mL round-bottomed flask containing (4-fluoro-1-methyl-1H-pyrazol-3-yl)methanol (285 g, 2.2 mmol) in dry DCM (10 mL), was added thionyl chloride (0.3 mL, 4.4 mmol). The reaction mixture was stirred at RT for 2 h then concentrated to dryness to provide the title compound, which was carried forward without further purification.
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