Reaktion #157847

Reaktionsgleichung

dimethylamine

4-(6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-2-methoxypyridin-3-yl)butyl methanesulfonate

→

(5R)-5-[(E)-2-(4-tert-butylphenyl)-2-{5-[4-(dimethylamino)butyl]-6-methoxypyridin-2-yl}ethenyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solvent was evaporated from the reaction solution
2. 2
   workup.ADDITIONwater was added
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
   Sonstigeafter which the solvent was evaporated under reduced pressure
8. 8
   SonstigeThe residue was purified by silica gel column chromatography (chloroform:methanol=100:0→4:1)

Vorschrift

Triethylamine (50 μL) and methanesulfonyl chloride (25 μL) were added to a solution of (5R)-5-{(E)-2-(4-tert-butylphenyl)-2-[5-(4-hydroxybutyl)-6-methoxypyridin-2-yl]ethenyl}-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one (144 mg) in chloroform (2 mL), and the mixture was stirred at room temperature for three hours. Triethylamine (50 μL) and methanesulfonyl chloride (25 μL) were further added thereto and the mixture was stirred at room temperature for one hour. The reaction solution was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with water and brine and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure to give 4-(6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-2-methoxypyridin-3-yl)butyl methanesulfonate as a crude product. 2 M dimethylamine (solution in methanol) (3 mL) was added to 4-(6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-2-methoxypyridin-3-yl)butyl methanesulfonate, and the mixture was stirred at room temperature for 17 hours. The solvent was evaporated from the reaction solution and then water was added, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered, after which the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform:methanol=100:0→4:1) to give (5R)-5-[(E)-2-(4-tert-butylphenyl)-2-{5-[4-(dimethylamino)butyl]-6-methoxypyridin-2-yl}ethenyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one as a colorless oil.

Quelle