Sulfuric Acid → 2-Propen-1-ol, 3-(4-methylphenyl)-, (2E)-
反応式
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]=[CH:9][C:10](O)=[O:11])=[CH:4][CH:3]=1.S(=O)(=O)(O)O>CO>[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]=[CH:9][CH2:10][OH:11])=[CH:4][CH:3]=1参加物
4
反応条件
- 温度
- 100 °C
実験手順
3-(4-Methylphenyl)acrylic acid (5.0 g) was dissolved in methanol (30 ml), concentrated sulfuric acid (0.5 ml) was added, and the mixture was stirred at 100° C. for 2.5 hr. The reaction mixture was concentrated, and the residue was washed with water. The obtained white solid was dissolved in tetrahydrofuran (120 ml), 1M diisobutylaluminum hydride/toluene solution (67 ml) was added dropwise at −78° C., and the mixture was stirred as it was at −78° C. for 2 hr. Saturated aqueous ammonium chloride solution was added to the reaction mixture, and the mixture was stirred at room temperature. Aluminum salt was collected by filtration through celite, extracted with methylene chloride, washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate) to give the object product (3.84 g) as a white powder.