反应详情

A mixture of N-[3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-4-(trifluoromethyl)pyrimidin-2-amine (222 mg, 0.585 mmol), ethyl-3-(5-bromopyridin-2-yl)prop-2-enoate (101 mg, 0.393 mmol), PdCl2(dppf) (62.9 mg, 0.086 mmol), sodium carbonate (2 M, 0.40 mL, 0.800 mmol), and dioxane (2.00 mL) was purged and flushed with Ar(g) (3×) and irradiated in a microwave reactor for 10 minutes at 100° C. The reaction mixture was further irradiated with microwave at 150° C. for another 10 minutes. The mixture was filtered, concentrated under reduced pressure and the residue was purified by silica gel chromatography (20% ethyl acetate in hexanes) to afford ethyl-3-[5-(3-methyl-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)pyridin-2-yl]prop-2-enoate. C22H20F3N4O2 [M+H]+ 429. found 429. 1H NMR (500 MHz, CDCl3) δ 8.89 (d, J=2.1 Hz, 1H), 8.64 (d, J=4.9 Hz, 1H), 7.93-7.85 (m, 2H), 7.73 (d, J=15.7 Hz, 1H), 7.64 (s, 1H), 7.48 (d, J=8.1 Hz, 1H), 7.36 (s, 1H), 7.13 (s, 1H), 7.03 (d, J=4.9 Hz, 1H), 6.94 (d, 1H), 4.28 (q, J=7.1 Hz, 2H), 2.42 (s, 3H), 1.34 (t, J=7.1 Hz, 3H).

1. customwas purged
2. customflushed with Ar(g) (3×)
3. customirradiated in a microwave reactor for 10 minutes at 100° C
4. customThe reaction mixture was further irradiated with microwave at 150° C. for another 10 minutes
5. filtrationThe mixture was filtered
6. concentrationconcentrated under reduced pressure
7. customthe residue was purified by silica gel chromatography (20% ethyl acetate in hexanes)