Aluminium lithium hydride → 2,5-Dimethyl-4-sulfanylphenol
反応式
[H-].[H-].[H-].[H-].[Al+3].[Li+].[CH3:7][C:8]1[CH:13]=[C:12]([OH:14])[C:11]([CH3:15])=[CH:10][C:9]=1[S:16]C#N>O1CCCC1>[CH3:7][C:8]1[CH:13]=[C:12]([OH:14])[C:11]([CH3:15])=[CH:10][C:9]=1[SH:16]参加物
4
反応条件
- 温度
- 0 °C
実験手順
In a 250 ml three-necked flask, to a stirred mixture of lithium aluminum tetrahydride (LiAlH4, 1.0 g, 26.3 mmol) and tetrahydrofuran (40 ml) was added dropwise a solution of 2,5-dimethyl-4-hydroxy-phenyl thiocyanic acid (1.2 g, 6.7 mmol) in 20 ml tetrahydrofuran at 0° C. After 30 min of stirring at 0° C., the mixture was allowed to warm up to room temperature and then stirred for another 1 hour at room temperature. The reaction was quenched by adding ethanol (10 ml). The value of pH of the mixture was adjusted to 3-4 by adding 6 M hydrochloric acid in an ice water bath, and then the aqueous phase was extracted with ethyl acetate (3×60 ml). The combined organic layer was dried over anhydrous magnesium sulfate, filtrated, and evaporated in vacuo to yield the crude product of 2,5-dimethyl-4-hydroxy-mercaptobenzene (yellow liquid).