反应详情

温度

100 °C

To a stirred solution of 7-bromo-9-fluoro-1-methyl-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoline (109-5; 1.8 g, 0.0063 mol) and (4-methylpyridin-3-yl)boronic acid (1.73 g, 0.0127 mol) in the mixture of 1,4-dioxan (10 mL) and water (10 mL) was added potassium acetate (1.88 g, 0.0191 mol). Reaction mass was purged with argon for 20 min. Then catalyst Pd(dppf)2Cl2 (0.260 g, 0.000319 mol) was added and allowed to stir at 100° C. for 12 h. The reaction mixture was filtered through CELITE bed and filter bed was thoroughly washed with ethyl acetate. The collected organic parts was concentrated under vacuum to afford the crude compound, which was purified by silica gel column chromatography to obtain title compound. 1H NMR (400 MHz, DMSO-d6) 8.46-8.44 (d, J=8 Hz, 1H), 8.422 (s, 1H), 7.52-7.48 (d, J=16 Hz, 1H), 7.423 (s, 1H), 7.36-7.35 (d, J=4 Hz, 1H), 2.99 (m, 4H), 2.52 (s, 3H), 2.31 (s, 3H). HPLC purity 98.68%, MS (M+1): 294.7.

1. customReaction mass
2. customwas purged with argon for 20 min
3. filtrationThe reaction mixture was filtered through CELITE bed
4. filtrationfilter bed
5. washwas thoroughly washed with ethyl acetate
6. concentrationThe collected organic parts was concentrated under vacuum
7. customto afford the crude compound, which
8. customwas purified by silica gel column chromatography