反应详情

温度

150 °C

A stirred solution of 4′-bromo-1′-[(2R)-tetrahydrofuran-2-ylmethyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one (0.125 g, 0.3 mmol), 2-(dimethylamino)pyridine 5-boronic acid hydrate (0.08 g, 0.45 mmol), tetrakis(triphenylphosphine)palladium(0) (0.04 g, 0.03 mmol), 2 M sodium carbonate (1 mL) in N,N-dimethylformamide (4 mL) was heated with stirring at 150° C. for 15 min in a microwave reactor. The solution was poured into distilled water (15 mL) and washed with ethyl acetate (75 mL). The ethyl acetate layer was washed with brine (3×25 mL), dried on magnesium sulfate, filtered and concentrated in vacuo to dryness. The residue was purified by flash chromatography with ethyl acetate in hexanes (gradient: 30% to 60%) to afford 4′-[6-(dimethylamino)pyridin-3-yl]-1′-[(2R)-tetrahydrofuran-2-ylmethyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1H)-one (0.11 g, 73%) as a colorless solid: 1H NMR (300 MHz, DMSO-d6) δ7.53 (d, J=2.4 Hz, 1H), 7.33 (dd, J=7.8 Hz, 1H), 7.18 (dd, J=7.4, 4.7 Hz, 1H), 6.77 (d, J=7.2 Hz, 1H), 6.71 (ddd, J=8.8, 2.4, 0.9 Hz, 1H), 6.51 (d, J=5.6 Hz, 1H), 6.31 (d, J=8.8 Hz, 1H), 6.12 (d, J=0.9 Hz, 1H), 4.59-4.41 (m, 3H), 4.33 (dd, J=9.4, 3.1 Hz, 1H), 4.23-4.08 (m, 1H), 3.89-3.55 (m, 4H), 3.09-2.86 (m, 2H), 2.95 (s, 6H), 2.05-1.69 (m, 3H), 1.67-1.51 (m, 1H); MS (ES+) m/z 484.1 (M+1).

1. additionThe solution was poured
2. distillationinto distilled water (15 mL)
3. washwashed with ethyl acetate (75 mL)
4. washThe ethyl acetate layer was washed with brine (3×25 mL)
5. customdried on magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo to dryness
8. customThe residue was purified by flash chromatography with ethyl acetate in hexanes (gradient: 30% to 60%)