反应详情

A solution of Example 6A (4.0 g, 12 mmol) and 4-fluorophenylboronic acid (1.68 g, 12 mmol) in 1,2-dimethoxyethane (100 mL) and methanol (50 mL) was treated with tetrakis(triphenylphosphine)palladium(0) (0.416 g, 0.36 mmol) and CsF (3.64 g, 24 mmol), heated to reflux, and stirred overnight. The reaction was concentrated and the concentrate was dissolved in ethyl acetate (100 mL) and water (50 mL). The aqueous layer was extracted with ethyl acetate (2×50 mL) and the combined extracts were washed with water and brine, dried (Na2SO4), filtered, and concentrated. The concentrate was purified by flash column chromatography on silica gel with 1:6 ethyl acetate/hexanes to provide the desired product (2.6 g, 78%). MS (CI) m/e 278 (M+H)+.

1. temperatureheated
2. temperatureto reflux
3. concentrationThe reaction was concentrated
4. dissolutionthe concentrate was dissolved in ethyl acetate (100 mL)
5. extractionThe aqueous layer was extracted with ethyl acetate (2×50 mL)
6. washthe combined extracts were washed with water and brine
7. dry with materialdried (Na2SO4)
8. filtrationfiltered
9. concentrationconcentrated
10. customThe concentrate was purified by flash column chromatography on silica gel with 1:6 ethyl acetate/hexanes