Reaktion #470139

Reaktionsgleichung

4-bromobenzyl chloride

(+)-2-[2-(N,N-dimethylamino)ethyl]-6-hydroxytetralin

sodium hydride

→

titled compound

Ausbeute 95.4%

(+)-6-(4-Bromobenzyl)oxy-2-[2-(N,N-dimethylamino)ethyl]tetralin Hydrochloride

Ausbeute 95.4%

Lösungsmittel

toluene

water

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas heated
2. 2
   Temperaturunder reflux for one hr
3. 3
   Einengenconcentrated
4. 4
   workup.ADDITIONThe residue was diluted with water
5. 5
   Extraktionextracted with ethyl acetate
6. 6
   WaschenThe organic layer was washed with saturated aqueous sodium chloride
7. 7
   Sonstigedried
8. 8
   Einengenconcentrated
9. 9
   workup.DISSOLUTIONThe residue was dissolved in solvent mixture of ethyl acetate/hexane (1:4)
10. 10
    Filtrationthe precipitate was filtered off
11. 11
    EinengenThe filtrate was concentrated
12. 12
    Sonstigethe residue was purified by alumina column chromatography (eluent: ethyl acetate:hexane=1:50 to 1:4)
13. 13
    WaschenThe crystals were washed with diisopropyl ether

Vorschrift

To a suspension of (+)-2-[2-(N,N-dimethylamino)ethyl]-6-hydroxytetralin (9.2 g) in toluene (180 ml) was added sodium hydride (60% in oil, 2.0 g). After stirring at 50° C. for 30 min, a solution of 4-bromobenzyl chloride (9.7 g) in toluene (45 ml) was added to the reaction mixture, which was heated under reflux for one hr. The reaction mixture was diluted with water and concentrated. The residue was diluted with water and extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried, and concentrated. The residue was dissolved in solvent mixture of ethyl acetate/hexane (1:4) and the precipitate was filtered off. The filtrate was concentrated and the residue was purified by alumina column chromatography (eluent: ethyl acetate:hexane=1:50 to 1:4) and converted into its hydrochloride. The crystals were washed with diisopropyl ether to obtain the titled compound (17.0 g).

Quelle