反应详情

A sample of 3-[(2-dimethylamino)methyl]-1-hydroxycyclohexyl]-benzonitrile (Procedure A, 1.66 g, 6.4 mmol) as a mixture of diastereomers was dissolved in tert-butanol (20 mL), powdered potassium hydroxide (1.8 g, 32.1 mmol) was added, and the reaction was brought to reflux for 1 h. After cooling the reaction, chloroform (50 mL) and water (50 mL) were added. The organic layer was separated, dried (K2CO3), filtered, and concentrated to afford 3-[(2-dimethylamino)methyl]-1-hydroxycyclohexyl]-benzamide as a diastereomeric mixture (1.6 g, 93%). The mixture was purified on a reverse phase C-18 column with 0.5% ammonium acetate in water and acetonitrile as eluents. Compound 1, 3-[(1-RS, 2-SR)-2-[(dimethylamino)methyl]-1-hydroxycyclohexyl]-benzamide, eluted first. Next to elute was Compound 2, 3-[(1-RR, 2-SS)-2-[(dimethylamino)methyl]-1-hydroxycyclohexyl]-benzamide.

1. temperatureto reflux for 1 h
2. temperatureAfter cooling
3. additionwere added
4. customThe organic layer was separated
5. dry with materialdried (K2CO3)
6. filtrationfiltered
7. concentrationconcentrated