反应详情

To a suspension of lithium aluminum hydride (5.7 g, 150 mmol) in tetrahydrofuran (200 ml) was added ethyl (E)-3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)acrylate (21.9 g, 50 mmol) at room temperature. The mixture was stirred at room temperature for 1 hour. After cooling on an ice bath, potassium fluoride (34 g) and water (10 ml) were added to the reaction mixture. The insoluble materials were removed by filtration. The filtrate was concentrated in vacuo, and the residue was dissolved in chloroform. The solution was washed with 10% aqueous citric acid solution. The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The oily residue was purified by column chromatography on silica gel eluting with chloroform to give 3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)propanol (14.8 g) as a solid.

1. temperatureAfter cooling on an ice bath
2. customThe insoluble materials were removed by filtration
3. concentrationThe filtrate was concentrated in vacuo
4. dissolutionthe residue was dissolved in chloroform
5. washThe solution was washed with 10% aqueous citric acid solution
6. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe oily residue was purified by column chromatography on silica gel eluting with chloroform