反应详情

To a suspension of 60% sodium hydride (0.18 g) in dimethylformamide (22 mL), 4-hydroxy-2,3-dihydro-1H-inden-1-one (1.0 g) was added and the resultant reaction mixture was stirred at room temperature for 1 hour. Then, into the reaction mixture, a solution of benzyl bromide (1.3 g) in DMF (15 mL) was added dropwise at 80° C. and at the same temperature, the resultant reaction mixture was heated with stirring for 30 minutes. Further, to the reaction mixture, sodium hydride (0.09 g) and benzyl bromide (0.30 g) were further added and the resultant reaction mixture was heated with stirring for 2 hours. To the reaction mixture, a saturated aqueous solution of ammonium chloride was added and the resultant reaction mixture was extracted with ethyl acetate. The organic phase was washed with saturated saline and was dried over sodium sulfate anhydride. From the organic phase, the solvent was distilled off under reduced pressure and the resultant residue was purified by silica gel column chromatography (eluate; n-hexane:ethyl acetate=5:1) to obtain 4-benzyloxy-2,3-dihydro-1H-inden-1-one (1.2 g) as a white solid. The obtained white solid was subjected to a reaction according to the method of (Example 124) <Step 2> to obtain the subject compound (1.1 g) as a white solid.

1. additionwas added
2. customthe resultant reaction mixture
3. customthe resultant reaction mixture
4. temperaturewas heated
5. stirringwith stirring for 30 minutes
6. customthe resultant reaction mixture
7. temperaturewas heated
8. stirringwith stirring for 2 hours
9. customthe resultant reaction mixture
10. extractionwas extracted with ethyl acetate
11. washThe organic phase was washed with saturated saline
12. dry with materialwas dried over sodium sulfate anhydride
13. distillationFrom the organic phase, the solvent was distilled off under reduced pressure
14. customthe resultant residue was purified by silica gel column chromatography (eluate; n-hexane:ethyl acetate=5:1)