反应详情

温度

60 °C

To a stirring mixture of methyl 6-bromo-3-methoxypicolinate (200 mg, 0.81 mmol), 2-(4-fluorophenyl)-N-methyl-6-(N-methylmethylsulfonamido)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuran-3-carboxamide (408 mg, 0.81 mmol) and K2CO3 (146 mg, 1.06 mmol) in dioxane/H2O (4 mL/0.2 mL) was added Pd(dppf)Cl2 (20 mg) under N2 protection. The mixture was stirred at 60° C. for 5 h, and after concentrated in vacuo, the residue was extracted with EtOAc. The organic phase was washed with brine, dried over Na2SO4 and evaporated. The residue was purified by column chromatography (PE:EtOAc=2:1, then 1:1) to give the product of methyl 6-(2-(4-fluorophenyl)-3-(methylcarbamoyl)-6-(N-methylmethylsulfonamido)benzofuran-5-yl)-3-methoxypicolinate (400 mg, yield: 90%). 1H-NMR (CDCl3, 400 MHz) δ 7.88˜7.92 (m, 3H), 7.70 (d, J=8.8 Hz, 1H), 7.56 (s, 1H), 7.40 (d, J=8.8 Hz, 1H), 7.14 (t, J=8.8 Hz, 2H), 5.85 (d, J=3.2 Hz, 1H), 3.91 (s, 3H), 3.89 (s, 3H), 3.15 (s, 3H), 2.92 (d, J=4.8 Hz, 3H), 2.72 (s, 3H). MS (M+H)+: 542.

1. concentrationafter concentrated in vacuo
2. extractionthe residue was extracted with EtOAc
3. washThe organic phase was washed with brine
4. dry with materialdried over Na2SO4
5. customevaporated
6. customThe residue was purified by column chromatography (PE