Reaktion #157725

Reaktionsgleichung

(5R)-1-(2,4-Dimethoxybenzyl)-5-ethynylpyrrolidin-2-one

4-tert-butyliodobenzene

water

→

(5R)-5-[(4-tert-butylphenyl)ethynyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one

Ausbeute 84.0%

Lösungsmittel

triethylamine

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITover one hour
2. 2
   workup.STIRRINGthe mixture was stirred at room temperature for three hours
3. 3
   Extraktionfollowed by extraction with ethyl acetate
4. 4
   WaschenThe organic layer was washed with brine
5. 5
   Trocknendried over anhydrous magnesium sulfate
6. 6
   Filtrationfiltered
7. 7
   SonstigeThe solvent was then evaporated under reduced pressure
8. 8
   SonstigeThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:0→1:1)

Vorschrift

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%).

Quelle