[C:1]([NH:4][C:5]1[CH:6]=[C:7]2[C:12](=[CH:13][CH:14]=1)[C:11](=[O:15])[CH2:10][CH2:9][CH2:8]2)(=[O:3])[CH3:2].[H-].[Na+].[CH3:18]I>O1CCCC1>[CH3:18][N:4]([C:5]1[CH:14]=[CH:13][C:12]2[C:11](=[O:15])[CH2:10][CH2:9][CH2:8][C:7]=2[CH:6]=1)[C:1](=[O:3])[CH3:2]6-Acetamido-1-tetralone (10.0 g, 49.2 mmol) was dissolved in tetrahydrofuran (100 ml). Sodium hydride (oil, 3.0 g) was added to the solution, which was refluxed with heating under nitrogen atmosphere for 2 hours. After cooling, methyl iodide (30 ml) was added to the reaction mixture, which was refluxed with heating under nitrogen atmosphere for 2 hours. The reaction mixture was concentrated. Ethyl acetate and water were added to the residue, and extraction was conducted. The ethyl acetate layer was concentrated, and the residue was purified by alumina column chromatography (development solvent; ethyl acetate: n-hexane=33:67˜50:50). The product was concentrated under reduced pressure, and the residue was recrystallized from ethyl acetate diisopropyl ether, to give the titled compound (4.3 g).
Wird geladen…
