反应详情

1-t-Butoxycarbonyl-4-hydroxy-4-(2-methoxyphenyl)piperidine (240 mg, 0.78 mmol) was dissolved in methylene chloride (4 ml). Thereto was added trifluoroacetic acid (4 ml) and the resulting solution was stirred at room temperature for 1 hour. The solvent was evaporated under a reduced pressure, and ethyl acetate was added to the thus obtained residue. This was washed with 1 N sodium hydroxide aqueous solution and saturated brine in that order, and then the solvent was evaporated under a reduced pressure to obtain 150 mg of the aforementioned compound of interest (0.78 mmol, 100% in yield).

1. customThe solvent was evaporated under a reduced pressure, and ethyl acetate
2. additionwas added to the thus obtained residue
3. washThis was washed with 1 N sodium hydroxide aqueous solution and saturated brine in that order
4. customthe solvent was evaporated under a reduced pressure
5. customto obtain