反应详情

3 g of tetrabutyl ortho-titanate are added to a solution of 52 g (0.35 mol) of (R)-1-(4-chlorophenyl)-ethylamine (97% ee) and 51.7 g (0.353 mol) of 4-chloroacetophenone in 300 ml of toluene at room temperature with stirring, and then the mixture is refluxed for 2 hours at the water separator. A further 2 g of tetrabutyl ortho-titanate are added, and the mixture is refluxed for a further 6 hours. A further 2 g of tetrabutyl ortho-titanate are then added, and the mixture is then refluxed for 3 hours. The reaction mixture is then filtered. The filtrate is evaporated under reduced pressure to give 67.3 g (66% of theory) of (R)-[1-(4-chlorophenyl)-ethyl]-[1-(4-chlorophenyl)-ethylidene]-amine.

1. temperaturethe mixture is refluxed for a further 6 hours
2. temperaturethe mixture is then refluxed for 3 hours
3. filtrationThe reaction mixture is then filtered
4. customThe filtrate is evaporated under reduced pressure