[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]=[N:11][N:10]([CH3:13])[C:9]=2[C:14](=[O:16])[CH3:15])=[CH:4][CH:3]=1.CC(OCC1C2C(=CC=CC=2)C(COC(C)=O)=C2C=1C=CC=C2)=O.[Br:41]Br>C(Cl)(Cl)Cl>[Br:41][CH2:15][C:14]([C:9]1[N:10]([CH3:13])[N:11]=[N:12][C:8]=1[C:5]1[CH:4]=[CH:3][C:2]([F:1])=[CH:7][CH:6]=1)=[O:16]A solution of 1-[5-(4-fluoro-phenyl)-3-methyl-3H-[1,2,3]triazol-4-yl]-ethanone (4.02 g, 18.34 mmol) was dissolved in chloroform (18 mL) and acetic (0.36 mL) was heated to reflux and then a solution of bromine (1.04 mL, 20.17 mmol) in chloroform (9 mL) was added dropwise within 10 min at and after 1 h bromine (0.10 mL, 2.02 mmol) was added and heated under reflux for 1 h. After cooling to room temperature the mixture was poured onto ice-water and the mixture extracted with dichloromethane. The combined organic extracts were washed with water, brine, dried over sodium sulphate, filtered and evaporated. Purification by chromatography (silica, 0 to 100% ethyl acetate in heptane) afforded the title compound (3.48 g, 63%) as a light red solid. MS: m/e=298.1/300.1 [M+H]+.
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