反应详情

2-[2-(tert-Butyl-dimethyl-silanyloxy)-ethoxy]-4-iodo-pyridine (305 mg, 0.805 mmol) was dissolved in 1 mL of dry THF. To this solution isopropylmagnesium chloride solution (2 M in THF, 0.44 mL, 0.88 mmol) was added at room temperature. After 30 minutes this solution was added to a solution of 5-chloro-3-[(4-chloro-3-trifluoromethyl-benzenesulfonyl)-methoxymethyl-amino]-pyridine-2-carboxylic acid methoxy-methyl-amide (283 mg, 0.564 mmol) in 1 mL dry THF at −78° C. The mixture was allowed to warm up to room temperature and stirred overnight followed by addition of 5 mL of aqueous saturated ammonium chloride and extraction with 15 mL DCM. The organic solution was evaporated under reduced pressure and purified on a 4 g silica column eluted with a gradient of 10-40% ethyl acetate in hexanes to yield 205 mg of N-(2-{2-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-pyridine-4-carbonyl}-5-chloro-pyridin-3-yl)-4-chloro-N-methoxymethyl-3-trifluoromethyl-benzenesulfonamide as a colorless oil.

1. customThe organic solution was evaporated under reduced pressure
2. custompurified on a 4 g silica column
3. washeluted with a gradient of 10-40% ethyl acetate in hexanes