反应详情

To a flask containing a bi-phasic mixture of 2-bromo-4-nitroanisole (15.0 g, 64.6 mmol) and 3-chlorophenylboronic acid (12.1 g, 77.6 mmol) in ethylene glycol dimethyl ether (187.5 mL) and 2.0 N aqueous cesium carbonate (97 mL) was added 1-1′-bis(diphenylphosphino)ferrocene)dichloro palladium (II), complex with dichloromethane (1:1) (1.5 g). The mixture was heated at reflux for 4 hours under a nitrogen atmosphere. The crude reaction mixture was partitioned between ethyl acetate (350 mL) and brine (250 mL) and then filtered through a Buchner funnel. Layers were separated and the organic layer washed with brine (250 mL). The organic phase was dried over Na2SO4, filtered, and concentrated to a dark oil. The crude residue was purified by flash chromatography on silica gel using dichloromethane as the eluent to afford 2-(3-chlorophenyl)-4-nitroanisole as a yellow solid (13.9 g, 59.4 mmol).

1. additionTo a flask containing
2. temperatureThe mixture was heated
3. temperatureat reflux for 4 hours under a nitrogen atmosphere
4. customThe crude reaction mixture
5. customwas partitioned between ethyl acetate (350 mL) and brine (250 mL)
6. filtrationfiltered through a Buchner funnel
7. customLayers were separated
8. washthe organic layer washed with brine (250 mL)
9. dry with materialThe organic phase was dried over Na2SO4
10. filtrationfiltered
11. concentrationconcentrated to a dark oil
12. customThe crude residue was purified by flash chromatography on silica gel