反应详情

温度

0 °C

To a solution of N-(2-bromo-5-chloro-pyridin-3-yl)-4-chloro-N-methoxymethyl-3-trifluoromethyl-benzenesulfonamide (10.6 mg, 21.4 mmol) in THF (80 mL) under nitrogen atmosphere at −40° C. was added isopropylmagnesium chloride (25 mL, 50 mmol, 2 M in THF). The mixture was then warmed to 0° C. over 30 min and DMF (4 mL, 51 mmol) was added. The reaction mixture was stirred at room temperature overnight, quenched with saturated aqueous ammonium chloride, and followed by HCl (1 M) to pH ˜3. The mixture was extracted with ethyl acetate, dried, and concentrated to provide 4-chloro-N-(5-chloro-2-formyl-pyridin-3-yl)-N-methoxymethyl-3-trifluoromethyl-benzenesulfonamide. MS: (M+H)/z=442.9.

1. customquenched with saturated aqueous ammonium chloride
2. extractionThe mixture was extracted with ethyl acetate
3. customdried
4. concentrationconcentrated