反应详情

5-bromo-3-methoxy-3-prop-1-ynyl-1,3-dihydroindol-2-one (0.56 g, 2.0 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.12 g, 0.10 mmol) were stirred at room temperature in dimethoxyethane (22 cm3). After 15 min. 3-chlorophenylboronic acid (0.63 g, 4.0 mmol) and sodium carbonate (1.06 g, 10 mmol) in water (11 cm3) were added and the mixture heated under reflux. After 16 h, the mixture was cooled, poured into water and extracted with EtOAc (×3). The combined organic layers were washed with sodium hydroxide (1N, ×2), brine, dried (MgSO4) and evaporated. The residue was subjected to column chromatography (SiO2, EtOAc: hexane, gradient elution) and the product triturated with hexane to afford the title compound (0.095 g, 0.30 mmol, 15%) as a solid: mp.>190° C. (decomp.); (CDCl3) δ 1.88 (s, 3H), 3.25 (s, 3H), 3.30 (s, 1H), 6.91 (d, 1H, J=8.1 Hz), 7.29–7.39 (m, 2H), 7.44–7.47 (m, 1H), 7.54–7.57 (m, 2H), 7.74 (d, 1H, J=1.7 Hz); MS (EI) m/z 311 (M+).

1. temperaturethe mixture heated
2. temperatureunder reflux
3. waitAfter 16 h
4. temperaturethe mixture was cooled
5. extractionextracted with EtOAc (×3)
6. washThe combined organic layers were washed with sodium hydroxide (1N, ×2), brine
7. dry with materialdried (MgSO4)
8. customevaporated
9. washThe residue was subjected to column chromatography (SiO2, EtOAc: hexane, gradient elution)
10. customthe product triturated with hexane