反应详情

In a 50 mL round-bottomed flask was added 2-chloro-N-(3-chloro-4-fluorophenyl)-6-(3-(dimethylamino)prop-1-ynyl)quinazolin-4-amine, (61 mg, 0.16 mmol), 3-pyridineboronic acid (25 mg, 0.20 mmol), K2CO3 (0.11 mg, 0.78 mmol) and PdCl2(PPh3)2, (5.5 mg, 7.8 mM) in dioxane (2 mL) to give a yellow suspension. The mixture was heated at reflux for 3 h under argon. After cooling to room temperature, water (10 mL) and ethyl acetate (10 mL) were added to the mixture to form a precipitate. The resulting precipitate was filtered through Celite. The filtrate was extracted with ethyl acetate (2×10 mL) and the combined organic layers were washed with water (1×15 mL) and brine (1×15 mL) and then dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography on silica gel (eluted with AcOEt/MeOH 1:0 to 9:1). The desired product was washed with CH2Cl2 to give 25 mg of N-(3-chloro-4-fluorophenyl)-6-(3-(dimethylamino)prop-1-ynyl)-2-(pyridin-3-yl)quinazolin-4-amine as a light brown solid in 37% yield. LCMS m/z=432 (M+1) (Method C) (retention time=1.86 ruin). 1H NMR (300 MHz, DMSO) δ 10.13 (s, 1H), 9.51 (s, 1H), 8.77-8.56 (m, 3H), 8.26 (dd, J=6.9, 2.5 Hz, 1H), 8.02-7.78 (m, 3H), 7.64-7.47 (m, 2H), 3.54 (s, 2H), 2.30 (s, 6H).

1. customto give a yellow suspension
2. temperatureThe mixture was heated
3. temperatureat reflux for 3 h under argon
4. customto form a precipitate
5. filtrationThe resulting precipitate was filtered through Celite
6. extractionThe filtrate was extracted with ethyl acetate (2×10 mL)
7. washthe combined organic layers were washed with water (1×15 mL) and brine (1×15 mL)
8. dry with materialdried over Na2SO4
9. filtrationfiltered
10. concentrationconcentrated
11. customThe residue was purified by column chromatography on silica gel (eluted with AcOEt/MeOH 1:0 to 9:1)
12. washThe desired product was washed with CH2Cl2