反应详情

4-Bromobenzotrifluoride (1 g, 4.44 mmol) was dissolved in THF (15 ml), to which n-butyllithium (1.5 M) hexane solution (3.1 ml, 4.67 mmol) was added dropwise at −70° C. Then a solution of 1-benzyl-4-piperidone in THF (15 ml) was added dropwise to the mixture, and the resulting mixture was stirred for 2 hours and then at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate, washed with water and brine, and dried over sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane/acetone=2/1) to afford 1-benzyl-4-(4-trifluoromethylphenyl)piperidin-4-ol (692 mg, yield 46%) as a colorless crystalline powder.

1. additionwas added dropwise at −70° C
2. waitat room temperature for 2 hours
3. washwashed with water and brine
4. dry with materialdried over sodium sulfate
5. filtrationAfter filtration
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (n-hexane/acetone=2/1)