反应详情

温度

-78 °C

Under an argon atmosphere, a solution of n-butyllithium (2.59M, in hexane) (8.76 ml) was added dropwise to a solution of 1,4-diiodobenzene (7.49 g) in anhydrous THF (50 ml) at −78° C., and the resulting mixture was stirred at −78° C. for 30 minutes. Tetrahydro-4H-pyran-4-one (2.09 ml) was added dropwise thereto and the resulting mixture was stirred at −78° C. for 1.5 hours. After stirring the mixture for another 3 hours at room temperature, water was added, and the resulting mixture was extracted with ethyl acetate. Organic layer was washed once with water and once with saturated brine, and dried over anhydrous sodium sulfate. After removing anhydrous sodium sulfate by filtration, the filtrate was concentrated. The residue was recrystallized from cyclohexane/ethyl acetate mixed solvent to obtain tetrahydro-4-(4-iodophenyl)-2H-pyran-4-ol (4.12 g).

1. stirringthe resulting mixture was stirred at −78° C. for 1.5 hours
2. stirringAfter stirring the mixture for another 3 hours at room temperature
3. extractionthe resulting mixture was extracted with ethyl acetate
4. washOrganic layer was washed once with water and once with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customAfter removing anhydrous sodium sulfate
7. filtrationby filtration
8. concentrationthe filtrate was concentrated
9. customThe residue was recrystallized from cyclohexane/ethyl acetate mixed solvent