[Cl:1][C:2]1[C:16]([Cl:17])=[CH:15][C:5]2[NH:6][C:7]([C:9](=[O:14])[C:10]([F:13])([F:12])[F:11])=[N:8][C:4]=2[CH:3]=1.[C:18]1([Mg]Br)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>C1COCC1.C(Cl)Cl>[Cl:17][C:16]1[C:2]([Cl:1])=[CH:3][C:4]2[NH:8][C:7]([C:9]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)([OH:14])[C:10]([F:13])([F:11])[F:12])=[N:6][C:5]=2[CH:15]=1To 1-(5,6-dichloro-1H-benzoimidazol-2-yl)-2,2,2-trifluoro-ethanone (595 mg) in THF (5 mL) at −78° C. was added phenyl magnesium bromide (4.6 mL of 1 M in THF) dropwise. The resulting mixture was stirred at 0° C. for 4 hr. The reaction was quenched with H2O and 1 N HCl, extracted with EtOAc, dried over Na2SO4, filtered, and concentrated to a residue. The residue was purified by flash chromatography with Biotage 40s+ column and elution with 10%-40% EtOAc/hexanes to yield a yellow solid. The yellow solid was dissolved in a minimal amount of CH2Cl2 and triturated with hexanes to yield the title compound as a tan solid.
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