反应详情

Into a solution of 167c (3.0 g, 14.6 mmol) in anhydrous DMF (30 mL) was added NaH (880 mg, 22 mmol). The mixture was stirred at room temperature for 30 minutes. 2-Bromoacetonitrile (3.5 g, 29.3 mmol) was added and the resulting mixture was heated at 65° C. for 1 hour. It was then stirred at room temperature overnight. After reaction water (30 mL) was added and the resulting mixture was extracted with ethyl acetate (200 mL×3). The combined organic phase was evaporated under reduced pressure to dryness. The residue was purified by silica-gel column chromatography eluting with 20:1 methylene chloride/methanol to afford 167d as a brown solid (2.6 g, 72%). MS: [M+H]+ 245.

1. temperaturethe resulting mixture was heated at 65° C. for 1 hour
2. stirringIt was then stirred at room temperature overnight
3. additionwas added
4. extractionthe resulting mixture was extracted with ethyl acetate (200 mL×3)
5. customThe combined organic phase was evaporated under reduced pressure to dryness
6. customThe residue was purified by silica-gel column chromatography
7. washeluting with 20:1 methylene chloride/methanol