反应详情

Under an argon atmosphere, to a solution of methyl 5-bromo-6-chloropicolinate (12.0 g) in toluene (300 mL) were added 2-fluoro-5-methoxyphenylboronic acid (9.83 g), [1,1-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane adduct (1.00 g) and a solution of sodium carbonate (14.8 g) in water (60 mL), and the mixture was stirred at 80° C. for 2 hr. The reaction mixture was concentrated under reduced pressure, and diluted with water. The reaction mixture was extracted with ethyl acetate, and the extract was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was recrystallized from ethyl acetate to give the title compound (13.1 g) as pale-yellow crystals.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additiondiluted with water
3. extractionThe reaction mixture was extracted with ethyl acetate
4. washthe extract was washed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe residue was recrystallized from ethyl acetate