反应详情

To a mixture of 5-nitro-6-bromo-1-indanone ethylene ketal (600 mg, 2.0 mmol) and 2,4-difluorothiophenol (F. Klages and K. Bott Chem. Ber. 97,735 (1964)) (440 mg, 3.0 mmol) in pyridine (4.0 mL) was added a solution of 8M aqueous potassium hydroxide (375 μL, 3.0 mmol) at room temperature. The mixture was stirred for 2 h, diluted with water and extracted with ethyl acetate. The ethyl acetate extract was washed successively with 1M aqueous NaOH (2x),0.5M aqueous HCl (1x), brine, dried over anhydrous MgSO4 and concentrated in vacuo. Chromatography over silica gel and eluted with toluene: ethyl acetate (10:1) afforded the title compound (590 mg, 81%) as a pale yellow solid.

1. extractionextracted with ethyl acetate
2. extractionThe ethyl acetate extract
3. washwas washed successively with 1M aqueous NaOH (2x),0.5M aqueous HCl (1x), brine
4. dry with materialdried over anhydrous MgSO4
5. concentrationconcentrated in vacuo
6. washChromatography over silica gel and eluted with toluene: ethyl acetate (10:1)