反应详情

温度

0 °C

To a solution of N-(2-bromo-5-methyl-pyridin-3-yl)-4-chloro-N-methoxymethyl-3-trifluoromethyl-benzenesulfonamide (246 mg, 0.5 mmol) in THF (3 mL) under nitrogen atmosphere at −30° C. was added isopropylmagnesium chloride (2 M solution in THF, 0.6 mL, 1.2 mmol) via dropwise addition. The mixture was then stirred for 30 min at 0° C. followed by the addition of a solution of 2-chloro-6-fluoro-benzaldehyde (150.6 mg, 0.95 mmol) at −30° C. The mixture was stirred at room temperature for 3 h, quenched with saturated aqueous NH4Cl solution (5 mL) and extracted with EtOAc (2×25 mL). The combined organic layers were washed with saturated aqueous NH4Cl solution (25 mL) and brine (25 mL), dried (Na2SO4), and concentrated under reduced pressure. The obtained residue was purified by flash column chromatography on silica gel (30% EtOAc-hexanes) to obtain 4-chloro-N-{5-chloro-2-[(2-chloro-6-fluoro-phenyl)-hydroxy-methyl]-pyridin-3-yl}-N-methoxymethyl-3-trifluoromethyl-benzenesulfonamide (144 mg) as yellow syrup in 51% yield. MS m/z 573 (M+H).

1. additionvia dropwise addition
2. stirringThe mixture was stirred at room temperature for 3 h
3. customquenched with saturated aqueous NH4Cl solution (5 mL)
4. extractionextracted with EtOAc (2×25 mL)
5. washThe combined organic layers were washed with saturated aqueous NH4Cl solution (25 mL) and brine (25 mL)
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated under reduced pressure
8. customThe obtained residue was purified by flash column chromatography on silica gel (30% EtOAc-hexanes)