反应详情

温度

80 °C

A mixture of 2,4-dichloro-pyrimidine (4.0 g, 27 mmol), 4-trifluoromethyl phenyl boronic acid (5.1 g, 27 mmol), tetrakis(triphenylphosphine)palladium(0) (1.5 g, 1.3 mmol), potassium phosphate (11 g, 54 mmol), 1,2-dimethoxyethane (50 mL) and water (10 mL) was heated to 80° C. under a blanket of nitrogen in a sealed tube. After 5 h, the mixture was partitioned between water (50 mL) and ethyl acetate (50 mL). The aqueous layer was extracted with ethyl acetate (3×50 mL). The combined organic layers were dried (MgSO4), filtered, and concentrated. The residue was purified directly by FCC to afford a white solid (5.0 g, 72%). MS (ESI): mass calcd. for C11H6ClF3N2, 258.0; m/z found, 259.0 [M+H]+. 1H NMR (500 MHz, CDCl3) δ 8.74 (d, J=5.2, 1H), 8.23 (d, J=8.1, 2H), 7.80 (d, J=8.2, 2H), 7.71 (d, J=5.2, 1H).

1. customthe mixture was partitioned between water (50 mL) and ethyl acetate (50 mL)
2. extractionThe aqueous layer was extracted with ethyl acetate (3×50 mL)
3. dry with materialThe combined organic layers were dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified directly by FCC