反应详情

温度

90 °C

A flask containing 2,4-dichloropyrimidine (0.5 g, 3.35 mmol), [6-(dimethylamino)pyridin-3-yl]boronic acid (0.61 g, 3.67 mmol) and DME (10 mL) was purged with N2 for 10 min. Dichloro[1,1′-bis(diphenylphosphino)]ferrocene-palladium CH2Cl2 adduct (0.37 g, 0.50 mmol) and triethylamine (0.85 g, 1.17 mL, 8.33 mmol) were added successively to the flask with continuous bubbling of N2 including 5 min. post addition of the reagents. The reaction mixture was stirred and heated at 90° C. for 5 h. Reaction progress was monitored by TLC (silica gel). The reaction mixture was concentrated and diluted with water, wherein a tan solid formed. The solid was filtered, dried and purified by silica gel column chromatography using 50% EtOAc/hexanes as eluent to provide 2-chloro-4-(6-dimethylaminopyridin-3-yl)pyrimidine as a white solid (0.56 g, 71%); 1H NMR (DMSO-d6): δ 8.91 (s, 1H), 8.60 (d, 1H, J=5.3 Hz), 8.20 (dd, 1H, J=2.3 and 9.1 Hz), 7.95 (d, 1H, J=5.3 Hz), 6.74 (d, 1H, J=9.1 Hz), 3.11 (s, 3H). LCMS: purity: 98%; MS (m/e): 235 (MH+).

1. customwas purged with N2 for 10 min
2. customwith continuous bubbling of N2 including 5 min. post addition of the reagents
3. customReaction progress
4. concentrationThe reaction mixture was concentrated
5. additiondiluted with water, wherein a tan solid
6. customformed
7. filtrationThe solid was filtered
8. customdried
9. custompurified by silica gel column chromatography