Dimethylformamide → 2-Chloro-6-fluoro-4-morpholin-4-yl-7-pyridin-3-yl-quinazoline

Participants

Reaction Conditions

Reaction Steps

To a 50 mL round bottom flask, 7-bromo-2-chloro-6-fluoro-4-morpholin-4-yl-quinazoline (200 mg, 0.0005764 mol), pyridine-3-boronic acid (63.3 mg, 0.0005188 mol), sodium carbonate (152.6 mg, 0.001441 mol), DMF (10 mL) and water (5 mL) were added and degassed the reaction vessel with nitrogen for 5-10 min. To the same reaction mixture, Pd(PPh3)2Cl2 (20.1 mg, 0.0000288 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, 2% MeOH in chloroform) to yield the desired product (180 mg, 91%). 1H NMR (300 MHz, CD3OD): δ 8.27-8.30 (m, 1H), 8.21-8.25 (m, 1H), 8.15-8.18 (m, 1H), 7.91-7.92 (m, 1H), 7.74-7.78 (m, 1H), 7.47-7.51 (m, 1H), 3.99-4.01 (m, 4H), 3.85-3.88 (m, 4H); LC-MS (ESI): Calculated mass: 344.1; Observed mass: 344.9 [M+H]+ (RT: 1.3 min).

Provenance & Evidence