反应详情

Magnesium turnings (1.00 g; 41.2 mmol) and iodine (two or three granules) were added to anhydrous diethyl ether (10 ml). While the mixture was stirred and heated under nitrogen atmosphere, m-bromotoluene (7.04 g; 41.2 mmol) in anhydrous diethyl ether (20 ml) was slowly added dropwise. The heating was ceased when spontaneous reflux started. After completion of the reflux, the mixture was brought to room temperature, and propionitrile (1.89 g; 34.3 mmol) in anhydrous diethyl ether (20 ml) was added dropwise. After completion of spontaneous reflux, the mixture was left to cool to room temperature. While the mixture was cooled in an ice bath, water and cooled diluted sulfuric acid were added dropwise in a sequential manner, followed by extraction with diethyl ether (100 ml). The organic layer was washed with saturated aqueous sodium bicarbonate solution and then with saturated brine, and dried over sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=10:1), to thereby yield 2.38 g of the target compound as pale yellow oily matter (yield: 46.8%).

1. temperatureheated under nitrogen atmosphere
2. temperaturespontaneous reflux
3. customwas brought to room temperature
4. waitAfter completion of spontaneous reflux, the mixture was left
5. temperatureWhile the mixture was cooled in an ice bath
6. additionwere added dropwise in a sequential manner
7. extractionfollowed by extraction with diethyl ether (100 ml)
8. washThe organic layer was washed with saturated aqueous sodium bicarbonate solution
9. dry with materialwith saturated brine, and dried over sodium sulfate
10. customThe solvent was evaporated under reduced pressure
11. customthe residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=10:1)