Aluminium lithium hydride → 3-(4'-Cyclopentylphenyl)-2-butenol
反応式
[H-].[H-].[H-].[H-].[Li+].[Al+3].[CH:7]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]([CH3:25])=[CH:19][C:20](OCC)=[O:21])=[CH:14][CH:13]=2)[CH2:11][CH2:10][CH2:9][CH2:8]1>CCOCC>[CH:7]1([C:12]2[CH:13]=[CH:14][C:15]([C:18]([CH3:25])=[CH:19][CH2:20][OH:21])=[CH:16][CH:17]=2)[CH2:8][CH2:9][CH2:10][CH2:11]1参加物
4
反応条件
- 温度
- 0 °C
実験手順
To an ice cooled slurry of LiAlH4 (2.7 g) in dry ether (150 ml) was added a solution of ethyl 3-(4′-cyclopentylphenyl)-but-2-enoate (3a, 8.2 g) in dry ether (50 ml) dropwise. The mixture was stirred at 0° C. for 3 h. The reaction mixture was quenched with water (10 ml). A solution of 10% NaOH (5 ml) was added and then ether layer was decanted. The precipitate was washed with ether and combined organic layer was concentrated. The crude product was purified by column chromatography on silica gel to give 5.6 g (82.3% yield) of 3-(4′-cyclopentylphenyl)-2-butenol (4a, formula 4, R=cyclopentyl) as oil.