反应详情

温度

80 °C

To a solution of Example 89F (1.0 g, 2.8 mmol) in DMF/THF (1:4, 20 mL) were added potassium tert-butoxide (0.35 g, 3.1 mmol, Aldrich), 1-bromo-2-methylpropane (0.43 g, 3.1 mmmol, Aldrich) and tetrabutylammonium iodide (0.1 g, 0.3 mmol, Aldrich). The reaction mixture was stirred at 80° C. for 16 h, cooled to room temperature, quenched with saturated aqueous NaHCO3 (20 mL). The aqueous layer was extracted with ethyl acetate (3×20 mL). The combined organic extracts were dried over anhydrous (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by column chromatography using an Analogix® Intelliflash280™ (SiO2, 0-1% methanol in dichloromethane) to afford 90 mg (29%) of the title compound. MS (ESI+) m/z 409 (M+H)+

1. temperaturecooled to room temperature
2. customquenched with saturated aqueous NaHCO3 (20 mL)
3. extractionThe aqueous layer was extracted with ethyl acetate (3×20 mL)
4. dry with materialThe combined organic extracts were dried over anhydrous (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by column chromatography