反应详情

温度

-78 °C

To a stirring solution of N,N-Diethyl-4-[(4-iodo-3,5-dimethyl-pyrazol-1-yl)-(3-methoxy-phenyl)-methyl]-benzamide (145 mg, 0.281 mmol) in 20 Ml EtOH/H2O (9:1) at room temperature was added 4-fluorobenzene boronic acid (118 mg, 0.842 mmol), Na2CO3 (90.0 mg, 0.842 mmol) and tetrakis(triphenylphosphine) palladium (0) (30.0 mg, 0.005 mmol). The mixture was cooled to −78° C., de-oxygenated under reduced pressure and purged with nitrogen gas. The mixture was refluxed for 2 hours, cooled to room temperature, filtered through a Celite pad and concentrated under reduce pressure. Purification of the crude material was accomplished by flash chromatography on a 2×15 cm column, eluting with 30% ethyl acetate/hexanes, collecting 8 Ml fractions. The product containing fractions were collected and concentrated to give the desired product (120 mg, 88%) as a clear colorless solid. 300 MHz 1H NMR (CDCl3) δ 7.33 (d, J=8.3 Hz, 2H), 7.16-7.23 (m, 5H), 7.04-7.15 (m, 2H), 6.71-6.84 (m, 3H), 6.55 (s, 1H), 3.74 (s, 3H), 3.52 (br s, 2H), 3.27 (br s, 2H), 2.19 (s, 3H), 2.16 (s, 3H), 1.21 (br s, 3H), 1.09 (br s, 3H), MS (M+1) 486.2.

1. custompurged with nitrogen gas
2. temperatureThe mixture was refluxed for 2 hours
3. temperaturecooled to room temperature
4. filtrationfiltered through a Celite pad
5. concentrationconcentrated
6. customPurification of the crude material
7. washeluting with 30% ethyl acetate/hexanes
8. customcollecting 8 Ml fractions
9. additionThe product containing fractions
10. customwere collected
11. concentrationconcentrated