反应详情

A mixture of 2-bromo-5-methylpyridine (2.00 g, 11.63 mmol), phenylboronic acid (1.56 g, 12.79 mmol), barium hydroxide (5.50 g, 17.4 mmol), DME (80 mL) and water (15 mL) was purged with dry argon. Tetrakis(triphenylphosphine)palladium(0) (672 mg, 0.58 mmol) was added, and the resultant solution was stirred at 80° C. for 4 hours. The solvents were evaporated in vacuo, and the residue partitioned between EtOAc and water and acidified with 1M aq. HCl. The aqueous extract was separated, and extracted with EtOAc. The organic extracts were combined, washed with NaHCO3 and 5% aq. Na2S2O3, dried (Na2SO4), filtered and the solvent evaporated in vacuo. The residue was purified by chromatography (Silica gel, CH2Cl2) to afford the title compound.

1. customwas purged with dry argon
2. customThe solvents were evaporated in vacuo
3. customthe residue partitioned between EtOAc and water
4. extractionThe aqueous extract
5. customwas separated
6. extractionextracted with EtOAc
7. washwashed with NaHCO3 and 5% aq. Na2S2O3
8. dry with materialdried (Na2SO4)
9. filtrationfiltered
10. customthe solvent evaporated in vacuo
11. customThe residue was purified by chromatography (Silica gel, CH2Cl2)