反应详情

22.6 g (100 mmol) of 2,4-dinitrophenylacetic acid are dissolved in 150 mL of THF and added dropwise in 2 hours to 300 mL of a borane-THF complex 1.0 M solution in THF. After 3 hours at 25° C., 200 ml of water are added. The reaction mixture is then poured to ethyl acetate and water. The organic phase is washed repeatedly with water and dried over sodium sulphate, filtered and concentrated under pressure. Chromatography of the residue using toluene: ethylacetate 1:1 as eluant and crystallization in ethylacetate/hexane yielded to 20.7 g (98%) of 2-(2,4-dinitrophenyl)ethanol as yellowish crystal

1. washThe organic phase is washed repeatedly with water
2. dry with materialdried over sodium sulphate
3. filtrationfiltered
4. concentrationconcentrated under pressure
5. customcrystallization in ethylacetate/hexane