反应详情

To a solution of the compound obtained in Example 14 (4) (16.5 mg) in N,N-dimethylformamide (3 ml), 60% sodium hydride (3.6 mg) was added under nitrogen atmosphere at 0° C. and the mixture was stirred for 30 minutes, followed by additin of 4-fluorobenzyl bromide (22.7 mg), and the mixture was stirred at 15 to 30° C. for 15 hours. The reaction solution was then poured into a saturated aqueous ammonium chloride solution and extracted with ethyl acetate. The organic layer was washed with water and a saturated aqueous NaCl solution, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was separated using silica gel preparative thin-layer chromatography (hexane:ethyl acetate=1:1) to obtain 18.4 mg of the desired product as a white powder.

1. stirringthe mixture was stirred at 15 to 30° C. for 15 hours
2. extractionextracted with ethyl acetate
3. washThe organic layer was washed with water
4. dry with materiala saturated aqueous NaCl solution, dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe resulting residue was separated