反应详情

温度

95 °C

To a 50 mL round bottom flask, 7-bromo-2-chloro-4-morpholin-4-yl-quinazoline (0.2 g, 0.0006 mol), pyrimidine-5-boronic acid (0.068 g, 0.0005 mol), sodium carbonate (0.129 g, 0.0012 mol), DMF (10 mL) and water (3 mL) were added and degassed the reaction vessel with N2 for 5-10 min. To the same reaction mixture, Pd(PPh3)2Cl2 (0.029 g, 0.00004 mol) was added and again degassed with N2 for 5-10 min. The reaction mixture was stirred at 95° C. for 2 h. The reaction mixture was cooled and diluted with ethyl acetate. The organic layer was washed with water, brine and dried over sodium sulfate. The solvent was removed under reduced pressure to afford the crude product. The crude product was purified; using column chromatography (60-120 silica gel, 60% ethyl acetate in hexane) to yield the desired product [150 mg, 75%]. 1H NMR (300 MHz, CDCl3): δ 9.27 (s, 1H), 9.04 (s, 2H), 7.85-8.45 (m, 2H), 7.60-7.64 (m, 1H), 3.82-3.91 (m, 8H); LC-MS (ESI): Calculated mass: 327.09; Observed mass: 328.0 [M+H]+ (RT: 0.98 min).

1. customdegassed the reaction vessel with N2 for 5-10 min
2. customagain degassed with N2 for 5-10 min
3. temperatureThe reaction mixture was cooled
4. additiondiluted with ethyl acetate
5. washThe organic layer was washed with water, brine
6. dry with materialdried over sodium sulfate
7. customThe solvent was removed under reduced pressure
8. customto afford the crude product
9. customThe crude product was purified