反应详情

3-Cyanopyrrole (3.6 g, 39.1 mmol , CE Loader et al, Can. J. Chem., 1981, 59, 2673) and 3,4-difluoronitrobenzene (6.5 g, 40.9 mmol) were dissolved in DMF (50 ml) and cooled in an ice-bath. The mixture was stirred and sodium hydride (60% in oil, 1.6 g, 40 mmol) added over 20 minutes. After allowing the mixture to come to ambient temperature, it was heated to 650 for 1 hour. Solvent was evaporated, the residue triturated with water, and filtered. The crude solide was purified by flash chromatography on silica, eluting with dichloromethane. Relevant fractions were combined to give the title product (3.75 g), mp 117-119°.

1. temperaturecooled in an ice-bath
2. customto come to ambient temperature
3. temperatureit was heated to 650 for 1 hour
4. customSolvent was evaporated
5. customthe residue triturated with water
6. filtrationfiltered
7. customThe crude solide was purified by flash chromatography on silica
8. washeluting with dichloromethane