反应详情

To a suspension of 2-[3-(methylamino)propyl]-2-(4-fluorophenyl)-1,3-dioxolane (7.2 g, 30.0 mmol), potassium carbonate (10.6 g, 76.8 mmol) and 120 ml of ethanol at 0° was added dropwise a solution of N-(2-bromoacetyl)-4-(3-chlorophenoxy)piperidine (11.3 g, 34.0 mmol) in 120 ml of ethanol. The solution was stirred 1 hour at room temperature and at reflux for 1 hour. The mixture was poured into saturated sodium bicarbonate, extracted with methylene chloride, washed with water and dried over magnesium sulfate. Filtration followed by evaporation of the solvent provided an oil. Yield: 11.0 g of 1-{N-{3-[2-(4-fluorophenyl)-1,3-dioxolan-2-yl]propyl}-N-methylaminoacetyl}-4-(3-chlorophenoxy)piperidine oxalate. Yield from 4-(3-chlorophenoxy)piperidine: 43%; from N-(2-bromoacetyl)-4-(3-chlorophenoxy)piperidine: 77%.

1. temperatureat reflux for 1 hour
2. extractionextracted with methylene chloride
3. washwashed with water
4. dry with materialdried over magnesium sulfate
5. filtrationFiltration
6. customfollowed by evaporation of the solvent
7. customprovided an oil