反应详情

Copper iodide (74 mg) and bis(triphenylphosphine)palladium(II) dichloride (135 mg) were added to a solution of 4-tert-butyliodobenzene (3.0 g) in triethylamine (10 mL), and the mixture was stirred at room temperature for 15 minutes. (5R)-1-(2,4-Dimethoxybenzyl)-5-ethynylpyrrolidin-2-one (1.0 g) was added thereto over one hour, and the mixture was stirred at room temperature for three hours. The reaction solution was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered. The solvent was then evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:0→1:1) to give (5R)-5-[(4-tert-butylphenyl)ethynyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one as a colorless powder (1.25 g, 84%).

1. waitover one hour
2. stirringthe mixture was stirred at room temperature for three hours
3. extractionfollowed by extraction with ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. customThe solvent was then evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:0→1:1)