反应详情

温度

160 °C

A mixture of 5-fluoro-pyridine-2-carboxylic acid methyl ester (179a) (342 mg, 2.20 mmol), 4-hydroxy-2,2-dimethyl-2,3-dihydro-benzofuran-6-carboxylic acid (1-methyl-1H-pyrazol-3-yl)-amide (31a) (633 mg, 2.20 mmol), and Cs2CO3 (1.44 g, 4.40 mmol) in DMF was heated to 160° C. in a microwave for 30 min, cooled to room temperature, quenched with H2O, and extracted with 3×EtOAc. The combined organic layer was washed with 2×H2O, dried over Na2SO4 and concentrated. The residue was purified by Biotage column chromatography with 75-90% EtOAc in hexanes to give a white solid (524 mg, 56% yield). 1H NMR (400 MHz, CDCl3) δ 8.49 (d, J=3.03 Hz, 2 H) 8.13 (d, J=8.59 Hz, 1 H) 7.22-7.36 (m, 2 H) 7.06 (d, J=5.05 Hz, 2 H) 6.77 (d, J=2.27 Hz, 1 H) 4.01 (s, 3 H) 3.78 (s, 3 H) 2.89 (s, 2 H) 1.49 (s, 6 H); LCMS for C22H22N4O5 m/z 423.20 (M+H+).

1. temperaturecooled to room temperature
2. customquenched with H2O
3. extractionextracted with 3×EtOAc
4. washThe combined organic layer was washed with 2×H2O
5. dry with materialdried over Na2SO4
6. concentrationconcentrated
7. customThe residue was purified by Biotage column chromatography with 75-90% EtOAc in hexanes