Reaktion #7088

Reaktionsgleichung

3-chlorophenylboronic acid

sodium carbonate

5-bromo-3-methoxy-3-prop-1-ynyl-1,3-dihydroindol-2-one

→

title compound

Ausbeute 15.0%

5-(3-Chloro-phenyl)-3-methoxy-3-prop-1-ynyl-1,3-dihydro-indol-2-one

Ausbeute 15.0%

Lösungsmittel

water

dimethoxyethane

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe mixture heated
2. 2
   Temperaturunder reflux
3. 3
   workup.WAITAfter 16 h
4. 4
   Temperaturthe mixture was cooled
5. 5
   Extraktionextracted with EtOAc (×3)
6. 6
   WaschenThe combined organic layers were washed with sodium hydroxide (1N, ×2), brine
7. 7
   Trocknendried (MgSO4)
8. 8
   Sonstigeevaporated
9. 9
   WaschenThe residue was subjected to column chromatography (SiO2, EtOAc: hexane, gradient elution)
10. 10
    Sonstigethe product triturated with hexane

Vorschrift

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+).

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