反应详情

温度

100 °C

To a degassed solution of 5-bromo-3-(4-fluoro-1H-indol-2-yl)pyrazin-2-ol (prepared using similar method described in Example 1, 1.23 g, 3.98 mmol), 2-(4-fluorophenyl)-N-methyl-6-(N-methylmethylsulfonamido)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuran-3-carboxamide (2 g, 3.98 mmol) and K3PO4.3H2O (2.12 g, 7.96 mmol) in IPA (20 mL) and H2O (2 mL) was added Pd2(dba)3 (50 mg) and X-Phos (50 mg) under nitrogen atmosphere. The reaction mixture was stirred at 100° C. for 16 h, concentrated in vacuo to remove IPA. The residue was diluted with H2O and extracted with DCM. Then the combined organic layers were washed with brine (100 mL), dried over Na2SO4, filtered, concentrated and purified by column chromatography (PE:EA=1:2) to give 5-(6-(4-fluoro-1H-indol-2-yl)-5-hydroxypyrazin-2-yl)-2-(4-fluorophenyl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (1 g, yield: 41%). 1H-NMR (CDCl3, 400 MHz) δ 8.52 (d, J=4.0 Hz, 1H), 8.06 (s, 1H), 8.02 (s, 1H), 7.71 (s, 1H), 7.66 (s, 1H), 7.42 (t, J=8.8 Hz, 2H), 7.33˜7.36 (m, 2H), 7.11˜7.18 (m, 2H), 6.80 (dd, J1=10.4 Hz, J2=8.0 Hz, 2H), 3.27 (s, 3H), 3.10 (s, 3H), 2.85 (d, J=4.8 Hz, 3H). MS (M+H)+: 604.

1. concentrationconcentrated in vacuo
2. customto remove IPA
3. additionThe residue was diluted with H2O
4. extractionextracted with DCM
5. washThen the combined organic layers were washed with brine (100 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. custompurified by column chromatography (PE:EA=1:2)