反应详情

温度

90 °C

To a solution of the product of Example 26A (370 mg, 1.16 mmoles) and 2-bromo-5-(trifluoromethyl)pyridine (341 mg, 1.51 mmoles) in N,N-dimethylformamide (10.0 ml) were added 1,1′-bis(diphenylphosphino)ferrocenedichloropalladium (II) (28 mg, 0.04 mmoles) and a 2M aqueous solution of sodium carbonate (1.7 ml, 3.48 mmoles) and the reaction mixture was heated under a nitrogen atmosphere to about 80° C. for about 1 hour. Another portion of 1,1′-bis(diphenylphosphino)ferrocenedichloropalladium (II) (28 mg, 0.04 mmoles) was added and the mixture was heated to about 90° C. for about 2 hours. The solvent was evaporated in high vacuum, the residue was taken up in water (20.0 ml) and diethyl ether (20.0 ml), and was filtered through Celite. The layers were separated and the aqueous layer was extracted with diethyl ether. The combined organic extracts were dried over MgSO4 and filtered. The filtrate was concentrated under reduced pressure and the crude product was purified by flash column chromatography on silica gel using hexanes/ethyl acetate (2:1) as the mobile phase to provide the title compound.

1. customThe solvent was evaporated in high vacuum
2. filtrationdiethyl ether (20.0 ml), and was filtered through Celite
3. customThe layers were separated
4. extractionthe aqueous layer was extracted with diethyl ether
5. dry with materialThe combined organic extracts were dried over MgSO4
6. filtrationfiltered
7. concentrationThe filtrate was concentrated under reduced pressure
8. customthe crude product was purified by flash column chromatography on silica gel