反应详情

温度

100 °C

To a mixture of methyl 2-bromo-6-methoxybenzoate (30 g, 0.12 mol) and potassium trifluoro(vinyl)borate (18 g, 0.13 mol) in dioxane and H2O (5:1, 360 mL) was added Pd(dppf)Cl2 (2.63 g, 0.0036 mol) and Na2CO3 (25.4 g, 0.24 mol) at RT. The reaction mixture was heated at 100° C. for 12 hours under a nitrogen atmosphere. The mixture was subsequently concentrated in vacuo, diluted with water, and extracted with EtOAc (3×100 mL). The organic layers were combined, washed with brine, dried over anhydrous Na2CO3, filtered, and concentrated. The crude product was purified by column chromatography eluting with a gradient of petroleum ether (1-2%) and EtOAc to give the title compound (22 g, 95%). 1H NMR (400 MHz, CDCl3) δ ppm 7.33 (t, J=8.0 Hz, 1H), 7.18 (d, J=8.0 Hz, 1H), 6.85 (d, J=8.0 Hz, 1H), 6.67 (dd, J=11.0, 17.4 Hz, 1H), 5.75 (d, J=17.4 Hz, 1H), 5.35 (d, J=11.0 Hz, 1H), 3.93 (s, 3H), 3.84 (s, 3H); ESI-MS m/z [M+H]+ 193.

1. concentrationThe mixture was subsequently concentrated in vacuo
2. additiondiluted with water
3. extractionextracted with EtOAc (3×100 mL)
4. washwashed with brine
5. dry with materialdried over anhydrous Na2CO3
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product was purified by column chromatography
9. washeluting with a gradient of petroleum ether (1-2%) and EtOAc