反应详情

温度

20 °C

To a suspension of anhydrous aluminum chloride (16.2 g) dispersed in 1,2-dichlorobenzene (150 ml) was added fluorobenzene (13 g), and thereto was added dropwise 2,4-dimethylbenzoyl chloride (17.0 g) at 0-20° C. The mixture was stirred at 10-30° C. for 1 hr and heated to 80° C. The mixture was stirred for 1 hr, cooled again and poured into 6N hydrochloric acid. The reaction mixture was diluted with a great excess toluene and partitioned. The obtained organic layer was washed successively with 5% aqueous sodium hydroxide solution and water, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography using cyclohexane-ethyl acetate as eluent to give nearly pure 1,3-dimethyl-4-(4′-fluorobenzoyl)benzene (19.4 g, 85%) as pale-yellow oil. The spectrum data of this oil were the same as those confirmed in Example 7.

1. temperatureheated to 80° C
2. stirringThe mixture was stirred for 1 hr
3. temperaturecooled again
4. custompartitioned
5. washThe obtained organic layer was washed successively with 5% aqueous sodium hydroxide solution and water
6. customthe solvent was evaporated under reduced pressure
7. customThe residue was purified by silica gel column chromatography