反应详情

Tetrakis(triphenylphosphine)palladium [0] (40 mg) was added to a stirred mixture of 4-cyano-2-trifluoromethylsulphonylbenzaldehyde (0.45 g, 1.6 mmol), lithium chloride (0.2 g, 4.8 mmol) and tri-n-butylphenylstannane (0.55 ml, 1.7 mmol) in dried dioxan (10 ml) under nitrogen atmosphere. The resulting suspension was heated under reflux for 24 hours. The dark mixture was cooled, and aqueous potassium fluoride solution (30 ml) and ethyl acetate (30 ml) were added. After vigorous stirring, the black precipitate was filtered and the filtrate layers separated. The ethyl acetate solution was washed with brine (30 ml), dried, filtered and evaporated to a yellow semi-solid (0.72 g). Chromatography on flash silica eluting with chloroform gave 4-cyano-2-phenylbenzaldehyde as a white solid, m.p. 75° C.

1. temperatureThe resulting suspension was heated
2. temperatureunder reflux for 24 hours
3. temperatureThe dark mixture was cooled
4. filtrationAfter vigorous stirring, the black precipitate was filtered
5. customthe filtrate layers separated
6. washThe ethyl acetate solution was washed with brine (30 ml)
7. customdried
8. filtrationfiltered
9. customevaporated to a yellow semi-solid (0.72 g)