反应详情

温度

100 °C

A solution of 4-formylphenylboronic acid (0.9 g, 5.64 mmol) in ethanol (10 mL) was added to a stirred solution of the crude 4-(4-bromophenyl)-dibenzofuran (from the previous reaction) in toluene (40 mL). Tetrakis-(Triphenylphosphine)-palladium(0) (270 mg, 5 mol %) and 2 N sodium carbonate (4.7 mL, 9.4 mmol) were added and then the reaction was heated to 100° C. (oil bath temp.) for 2-3 h until complete (TLC control). The reaction mixture was cooled to room temperature and partitioned between water and ethyl acetate. The phases were separated, the aqueous phase being further extracted with ethyl acetate (2×20 mL). The combined organic extracts were washed with 0.5 N hydrochloric acid, water and sat'd aq NaCl and then dried over anhyd MgSO4, filtered and concentrated in vacuo. Purification by flash column chromatography (10-20% ethyl acetate in heptane) afforded the title compound has a white solid (1.51 g).

1. temperatureThe reaction mixture was cooled to room temperature
2. custompartitioned between water and ethyl acetate
3. customThe phases were separated
4. extractionthe aqueous phase being further extracted with ethyl acetate (2×20 mL)
5. washThe combined organic extracts were washed with 0.5 N hydrochloric acid, water
6. dry with materialdried over anhyd MgSO4
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customPurification by flash column chromatography (10-20% ethyl acetate in heptane)