反应详情

Under argon, to a solution of [(3-bromophenyl)oxy](1,1-dimethylethyl)-dimethylsilane (1.5 g, 5.22 mmol) in THF (60 mL) at −78° C., was added dropwise n-BuLi (3.6 mL, 1.6 M in hexanes), 20 min after the addition, this solution was added to a solution of dihydro-2,5-furandione (630 mg, 6.26 mmol) in THF (10 mL) under argon at −78° C. 15 min later, the reaction mixture was slowly warmed to rt overnight. The reaction mixture was diluted with EtOAc (50 mL), then extracted with NaOH (20 ml, 1.0 N). Aquaous layer was acidified with HCl (1.0N) until pH=2, then extracted with EtOAc (100 mL). The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated to afford the title compound as a colorless crystal (546 mg, 54%). MS (ES+) m/e 195 [M+H]+.

1. additionafter the addition
2. extractionextracted with NaOH (20 ml, 1.0 N)
3. extractionextracted with EtOAc (100 mL)
4. washThe organic layer was washed with brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated