Diethyl Ether → HCID 15512819, Verbindung

HRID 1633574Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1633574
C([Li])CCC.BrC1C=[CH:11][C:10]([F:13])=[CH:9][C:8]=1OC.[CH2:16]([N:23]1[CH2:28][CH2:27][C:26](=[O:29])[CH2:25][CH2:24]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.[CH2:30]([O:32][CH2:33][CH3:34])C>>[CH2:16]([N:23]1[CH2:28][CH2:27][C:26]([C:8]2[CH:9]=[C:10]([F:13])[CH:11]=[CH:34][C:33]=2[O:32][CH3:30])([OH:29])[CH2:25][CH2:24]1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Komponenten

5

Edukt 4

HCID 3283Diethyl Ether3×HCID 192201-Benzyl-4-piperidoneHCID 70180432-Bromo-5-fluoroanisoleHCID 178418339Butyllithium

Produkt 1

HCID 15512819HCID 15512819, VerbindungAusbeute 68 %

Reaktionsbedingungen

Temperatur
-50 °C

Versuchsvorschrift

To a solution of 9.8 mL (24 mmole) butyllithium (2.5 M solution in hexane) in diethylether (20 mL) under N. at −78° C. was slowly added 2-bromo-5-fluoroanisole (5.0 g, 24 mmole) in diethylether (5 mL). The mixture was allowed to warm up to −50° C. At this point, 1-benzyl-4-piperidone (4.62 g, 24.4 mmole) in diethylether (3 mL) was added. The resulting mixture was allowed to stirred at −50° C. for 30 minutes, and then warmed to room temperature. The reaction was quenched by dropwise addition of saturated NH4Cl solution. The mixture was then transferred to a separatory funnel, the layers were separated and the aqueous was extracted three times with EtOAc. The combined organic phase was dried over Na2SO4, filtered and concentrated. Flash chromatography (elution with 7:3 EtOAc-hexanes) afforded 5.27 g (68%) of 1-benzyl-4-(5-fluoro-2-methoxy-phenyl)-4-hydroxypiperidine as a yellow oil.

Aufarbeitung

  1. customat −78° C.
  2. temperaturewarmed to room temperature
  3. customThe reaction was quenched by dropwise addition of saturated NH4Cl solution
  4. customThe mixture was then transferred to a separatory funnel
  5. customthe layers were separated
  6. extractionthe aqueous was extracted three times with EtOAc
  7. dry with materialThe combined organic phase was dried over Na2SO4
  8. filtrationfiltered
  9. concentrationconcentrated
  10. washFlash chromatography (elution with 7:3 EtOAc-hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-a84e3a854326423da799d986ddab85aa
Quelldatensatz
uspto-grants-2003_01
Patentnummer
US06503928B2

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