反应详情

温度

0 °C

Under an N2 atmosphere, dissolve 3,3-Bis-[4-(tert-butyl-dimethyl-silanyloxy)-3,5-dimethyl-phenyl]-1,3-dihydro-indol-2-one (2.5 g, 4.15 mmol) in dry DMF (50 mL). Cool the reaction to 0° C. Add a solution of potassium t-butoxide (1.0 M) in THF (4.57 mL). Allow the reaction to stir at 0° C. for 10 minutes. Add bromoacetonitrile (0.32 mL, 4.57 mmol), and allow the reaction to warm to room temperature. Stir the reaction at room temperature overnight. Dilute the reaction with water (200 mL) and diethyl ether (200 mL). Separate the layers and wash the aqueous layer with diethyl ether (100 mL). Combine the organic layers. Wash the diethyl ether with brine (100 mL), and separate the layers. Dry the organic layer with sodium sulfate and concentrate in vacuo. Purify the crude oil by flash column chromatography. Elute the column with 20% ethyl acetate in hexanes to give 1.92 g (72%) of the title compound: 1H NMR(CDCl3): δ7.36 (td, 1H), 7.29-7.26 (m, 1H), 7.17 (td, 1H), 7.06 (d, 1H), 6.77 (s, 4H), 4.72 (s, 2H), 2.12 (s, 12H), 1.01 (s, 18H), 0.16 (s, 6H) 0.16 (s, 6H).

1. temperatureCool
2. customthe reaction to 0° C
3. customthe reaction
4. customthe reaction
5. temperatureto warm to room temperature
6. stirringStir
7. customthe reaction at room temperature overnight
8. additionDilute
9. customSeparate the layers
10. washwash the aqueous layer with diethyl ether (100 mL)
11. washWash the diethyl ether with brine (100 mL)
12. customseparate the layers
13. dry with materialDry the organic layer with sodium sulfate
14. concentrationconcentrate in vacuo
15. customPurify the crude oil by flash column chromatography
16. washElute the column with 20% ethyl acetate in hexanes