Reaktion #364091

Reaktionsgleichung

trifluoroacetic acid

1-t-Butoxycarbonyl-4-methoxy-4-phenyl-piperidine

1-methyl-2a-(4-bromobutyl)-2a,3,4,5-tetrahydrobenz[cd]indole-2(1H) -one

potassium carbonate

→

title compound

Ausbeute 22.1%

2a-[4-(4-Methoxy-4-phenyl-piperidyl)butyl]-1-methyl-2a,3,4,5-tetrahydrobenz[cd]indole-2(1H)-one

Ausbeute 22.1%

Lösungsmittel

ethyl acetate

dichloromethane

ethyl acetate

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with sodium hydroxide aqueous solution (1 N)
2. 2
   Trocknendried with anhydrous sodium sulfate
3. 3
   SonstigeThe solvent was evaporated under a reduced pressure
4. 4
   workup.DISSOLUTIONthe thus obtained material was dissolved in anhydrous N,N-dimethylformamide (2 ml)
5. 5
   workup.STIRRINGstirred at 60° C. for 3 hours
6. 6
   Extraktionthe reaction product was extracted with ethyl acetate
7. 7
   Waschenwashed with saturated brine
8. 8
   Trocknendried with anhydrous sodium sulfate
9. 9
   SonstigeThen the compound obtained by the evaporation of the solvent under a reduced pressure
10. 10
    Sonstigewas separated
11. 11
    Sonstigepurified by a silica gel column chromatography

Vorschrift

1-t-Butoxycarbonyl-4-methoxy-4-phenyl-piperidine (510 mg, 1.7 mmol) was dissolved in dichloromethane (2 ml). Thereto was added trifluoroacetic acid (4 ml), and the resulting solution was stirred at a room temperature for 30 minutes. The reaction solution was diluted with ethyl acetate, washed with sodium hydroxide aqueous solution (1 N) and dried with anhydrous sodium sulfate. The solvent was evaporated under a reduced pressure, and the thus obtained material was dissolved in anhydrous N,N-dimethylformamide (2 ml). Then the resulting solution was mixed with 1-methyl-2a-(4-bromobutyl)-2a,3,4,5-tetrahydrobenz[cd]indole-2(1H) -one (450 mg, 1.4 mmol) and potassium carbonate (290 mg, 2.1 mmol) and stirred at 60° C. for 3 hours. The reaction solution was mixed with ethyl acetate and water, and the reaction product was extracted with ethyl acetate, washed with saturated brine and dried with anhydrous sodium sulfate. Then the compound obtained by the evaporation of the solvent under a reduced pressure was separated and purified by a silica gel column chromatography to obtain 79 mg of the title compound (0.31 mmol, 18% in yield).

Quelle