Dimethylformamide → 2-Chloro-8-(6-fluoro-pyridin-3-yl)-4-morpholin-4-yl-quinazoline

Participants

Reaction Conditions

Reaction Steps

To a 50 mL round bottom flask, 8-bromo-2-chloro-4-morpholin-4-yl-quinazoline (150 mg, 0.00046 mol), 2-fluoropyridine-5-boronic acid (58 mg, 0.00041 mol), sodium carbonate (72 mg, 0.00068 mol), DMF (10 mL) and water (3 mL) were added and the reaction vessel was degassed with nitrogen for 5-10 min. To the same reaction mixture, PdCl2(PPh3)2 (16 mg, 0.000023 mol) was added and again degassed with nitrogen 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 [90 mg, 60%]. 1H NMR (300 MHz, CDCl3): δ 8.44 (s, 1H), 8.17-8.24 (m, 1H), 7.89 (d, J=8.1 Hz, 1H), 7.78 (d, J=7.5 Hz, 1H), 7.53 (t, J=7.5 Hz, 1H), 7.75 (dd, J′=2.7, J″=3.0 Hz, 1H), 3.89 (s, 8H). LC-MS (ESI): Calculated mass: 344.1; Observed mass: 345.0 [M+H]+ (RT: 1.63 min).

Provenance & Evidence