反应详情

温度

65 °C

48% hydrobromic acid (0.6 mL) was added to a solution of (5R)-5-[(E)-2-(4-tert-butylphenyl)-2-(5-ethyl-6-methoxypyridin-2-yl)ethenyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one (59 mg) in 1,4-dioxane (0.6 mL), and the mixture was stirred at 65° C. for 1.5 hours. Water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate, after which the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography (chloroform:methanol=10:0→3:1) to give 6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-3-ethylpyridin-2(1H)-one as a colorless oil (49 mg).

1. extractionfollowed by extraction with ethyl acetate
2. washThe organic layer was washed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customafter which the solvent was evaporated under reduced pressure
5. customThe resulting residue was purified by silica gel column chromatography (chloroform:methanol=10:0→3:1)