反应详情

温度

-78 °C

To a solution of methyl 5-bromo-2-(2-(3-(trifluoromethyl)phenyl)acetamido)benzoate (3.86 g, 9.28 mmol, Intermediate 5: step b) in THF (100 mL) at −78° C. was added KHMDS (0.5 M in toluene, 55.6 mL, 27.8 mmol) over 8 minutes. The resulting light yellow solution was stirred at −78° C. for 5 minutes, then was transferred to an ice bath and stirred for 1 hour 15 minutes. The mixture was diluted with water and extracted once with EtOAc. The aqueous phase was acidified to pH 2 by addition of 1 N aqueous HCl solution. A white precipitate formed upon acidification and was collected by vacuum filtration and air dried to afford the title compound as a white powder.

1. customwas transferred to an ice bath
2. stirringstirred for 1 hour 15 minutes
3. extractionextracted once with EtOAc
4. additionThe aqueous phase was acidified to pH 2 by addition of 1 N aqueous HCl solution
5. customA white precipitate formed upon acidification
6. filtrationwas collected by vacuum filtration and air
7. customdried