反应详情

温度

90 °C

A stirred mixture of 2-chloro-5-morpholinoaniline (608 mg, 2.86 mmol), grounded 2-dicyclohexylphosphino-2,6-dimethoxybiphenyl, (S-Phos) (236 mg, 0.57 mmol), palladium (II) acetate (64.7 mg, 0.29 mmol), 6-methoxypyridin-3-ylboronic acid (876 mg, 5.72 mmol), and potassium phosphate tribasic (1.82 g, 8.59 mmol) in DMF (7.0 mL) and water (0.3 mL) was purged 3 times with argon and placed under vacuum 3 times. The reaction mixture was carefully heated to 90° C. After 21 h, the reaction was cooled to rt, then diluted with water and extracted 3 times with EtOAc. The organic extractions were combined and washed twice with brine. After drying over anhydrous sodium sulfate and filtration, the organic solvent was removed under reduced pressure. The residue was purified over basic alumina (0-20% EtOAc in hexanes) to afford a tan solid as 2-(6-methoxypyridin-3-yl)-5-morpholinoaniline. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.12 (1H, d, J=1.8 Hz), 7.69 (1H, dd, J=8.6, 2.5 Hz), 6.92 (2H, m), 6.34 (1H, d, J=2.3 Hz), 6.28 (1H, dd, J=8.4, 2.5 Hz), 4.68 (2H, s), 3.87 (3H, s), 3.78 (4H, m), 3.12 (4H, m). Mass Spectrum (pos.) m/e: 286.1 (M+1).

1. customwas purged 3 times with argon
2. temperaturethe reaction was cooled to rt
3. additiondiluted with water
4. extractionextracted 3 times with EtOAc
5. extractionThe organic extractions
6. washwashed twice with brine
7. dry with materialAfter drying over anhydrous sodium sulfate and filtration
8. customthe organic solvent was removed under reduced pressure
9. customThe residue was purified over basic alumina (0-20% EtOAc in hexanes)