Reaction Steps
To a solution of 1-(4-(1H-1,2,4-triazol-1-yl)phenyl)-3-(3,5-dichlorophenyl)-4,4,4-trifluorobutan-1-one (300 mg, 0.726 mmol) in THF cooled to 0° C. was added methylmagnesium bromide (450 mg, 5 mmol) drop wise. The reaction was stirred for 3 h at 0° C., then the reaction mixture was quenched with sat aqueous NH4Cl solution and extracted with EtOAc. The combined EtOAc layer was washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by column chromatography (SiO2, 100-200 mesh; 20%-25% EtOAc in petroleum ether) afforded the title compound as a solid (100 mg, 32%): 1H NMR (400 MHz, CDCl3) δ two diastereoisomers 8.58 (s, 1H, minor), 8.48 (s, 1H, major), 8.13 (s, 1H, minor), 8.09 (s, 1H, major), 7.70 (d, J=9.0 Hz, 2H, minor), 7.53 (d, J=9.0 Hz, 2H, minor), 7.40 (d, J=9.0 Hz, 2H, major), 7.31 (m, 1H, minor), 7.27 (d, J=9.0 Hz, 2H, major), 7.20 (m, 2H, minor), 7.01 (m, 1H, major), 6.75 (m, 2H, major), 350 (m, 1H), 2.50 (m, 2H), 1.56 (s, 3H, major), 1.54 (s, 3H, minor); ESIMS m/z 430.05 ([M+H]+).
