反应详情

Dissolve 4-[1-hydroxy-1-(2,3-dimethoxyphenyl)methyl]piperidine (11) (11.0 g, 43.8 mmol) and 17.0 g (40.1 mmol) (2R,3R)-(−)-di-(p-anisoyl)tartaric acid in 400 mL refluxing isopropanol. Allow the mixture to cool to room temperature. Collect the precipitate, rinse with isopropanol and dry to give the (R)-α-(2,3-dimethoxyphenyl)-4-piperidinemethanol, (2R,3R)-(−)-di-(p-anisoyl)tartaric acid. Recrystallize the (R)-α-(2,3-dimethoxyphenyl)-4-piperidinemethanol, (2R,3R)-(−)-di-(p-anisoyl)tartaric acid salt from 250 mL isopropanol.

1. customCollect the precipitate
2. washrinse with isopropanol
3. customdry