反应详情

To a solution of 3-chloro-1-(10,11-dihydro-5H-dibenz[b,f]azepin-5-yl)-1-propanone (14.0 g, 0.044 mol) in tetrahydrofuran (150 ml) at 0° C., sodium borohydride (6.66 g, 0.176 mol) was added, followed by dropwise addition of glacial acetic acid (10.0 ml). The resulting mixture was stirred at room temperature overnight and then heated at reflux temperature for 2 h. More sodium borohydride (6.50 g, 172 mmol) and then borontrifluoride diethyl etherate (20.0 ml, 0.163 mol) were added and heating at reflux temperature was continued for 20 h. Water (350 ml) was cautiously added and the phases were separated. The aqueous phase was extracted with toluene (3×100 ml). The combined organic phases were washed with brine (3×100 ml), dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (100 g) using a gradient of heptane and ethyl acetate (10:0→10:2), to give 4.58 g (38%) of 5-(3-chloropropyl)-10,11-dihydro-5H-dibenz[b,f]azepine as an oil.

1. temperatureheated
2. temperatureat reflux temperature for 2 h
3. temperatureheating
4. temperatureat reflux temperature
5. waitwas continued for 20 h
6. customthe phases were separated
7. extractionThe aqueous phase was extracted with toluene (3×100 ml)
8. washThe combined organic phases were washed with brine (3×100 ml)
9. dry with materialdried (MgSO4)
10. concentrationconcentrated in vacuo
11. customThe residue was purified by flash chromatography on silica gel (100 g)