反应详情

温度

60 °C

A mixture of rac-5-chloro-3-(4-methoxy-phenyl)-1,3-dihydro-indol-2-one (0.15 g, 0.55 mmol) (from Example 1b supra), benzyl bromide (113 mg, 0.65 mmol), potassium iodide (108 mg, 0.65 mmol) and potassium carbonate (163 mg, 1.18 mmol) in acetone (5 mL) was heated at 60° C. for 20 hours. After cooling, mixture was diluted with ethyl acetate (50 mL) and extracted with water (50 mL) and brine (50 mL). Aqueous layers were back washed with ethyl acetate (50 mL). Organic layers were combined, dried (MgSO4), filtered and concentrated. Residue was purified by flash chromatography (Biotage 40S, dichloro-methane as solvent) to give two products. Lower Rf sample was recrystallized from ethyl acetate-hexanes to give rac-3-benzyl-5-chloro-3-(4-methoxy-phenyl)-1,3-dihydro-indol-2-one as white crystals. (Yield 58 mg, 29.1%).

1. temperatureAfter cooling
2. extractionextracted with water (50 mL) and brine (50 mL)
3. washAqueous layers were back washed with ethyl acetate (50 mL)
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated
7. customResidue was purified by flash chromatography (Biotage 40S, dichloro-methane as solvent)
8. customto give two products
9. customLower Rf sample was recrystallized from ethyl acetate-hexanes