Hexane → 1-Benzyl-4-(1-phenethyl-1H-imidazol-2-YL)piperidin-4-OL

HRID 7406

Reaktionsgleichung

Reaktionsgleichung von HRID 7406
C([Li])CCC.[CH3:6][CH2:7][CH2:8][CH2:9][CH2:10][CH3:11].[C:12]1([CH:18]([N:20]2[CH:24]=[CH:23][N:22]=[CH:21]2)C)C=CC=CC=1.[C:25]1([CH2:31][N:32]2[CH2:37][CH2:36][C:35](=[O:38])[CH2:34][CH2:33]2)[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>C1COCC1.O>[C:8]1([CH2:12][CH2:18][N:20]2[CH:24]=[CH:23][N:22]=[C:21]2[C:35]2([OH:38])[CH2:36][CH2:37][N:32]([CH2:31][C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[CH2:33][CH2:34]2)[CH:7]=[CH:6][CH:11]=[CH:10][CH:9]=1

Komponenten

7

Edukt 4

HCID 8058HexaneHCID 192201-Benzyl-4-piperidoneHCID 98153511-(1-Phenylethyl)-1h-imidazoleHCID 178418339Butyllithium

Produkt 1

HCID 113259041-Benzyl-4-(1-phenethyl-1H-imidazol-2-YL)piperidin-4-OLAusbeute 75 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel3×

Reaktionsbedingungen

Temperatur
-70 °C

Versuchsvorschrift

A mixture of DIPA (1.4 mol) in THF (3000 ml) was stirred at −70° C. under N2 flow. Butyllithium 2.5 M/hexane (1.3 mol) was added portionwise at a temperature below −40° C. The mixture was stirred at −70° C. for 15 min. 1-phenylethyl-1H-imidazole (1 mol) dissolved in THF was added dropwise at a temperature below −55° C. The mixture was stirred at −70° C. for 1 hour. 1-(phenylmethyl)-4-piperidinone (1.2 mol) dissolved in THF was added dropwise at a temperature below −55° C. The mixture was stirred at −70° C. for 1 hour, then brought to room temperature, stirred at room temperature overnight and decomposed with H2O. The organic solvent was evaporated. The aqueous concentrate was extracted with CH2Cl2. The organic layer was separated, dried (MgSO4), filtered and the solvent was evaporated. The residue was crystallized from DIPE (1100 ml). The precipitate was filtered off, washed with DIPE and dried, yielding 271 g of 4-[1-(2-phenylethyl)-1H-imidazol-2-yl]-1-(phenylmethyl)-4-piperidinol (75%) (interm. 1).

Aufarbeitung

  1. stirringThe mixture was stirred at −70° C. for 15 min
  2. additionwas added dropwise at a temperature below −55° C
  3. stirringThe mixture was stirred at −70° C. for 1 hour
  4. additionwas added dropwise at a temperature below −55° C
  5. stirringThe mixture was stirred at −70° C. for 1 hour
  6. custombrought to room temperature
  7. stirringstirred at room temperature overnight
  8. customThe organic solvent was evaporated
  9. concentrationThe aqueous concentrate
  10. extractionwas extracted with CH2Cl2
  11. customThe organic layer was separated
  12. dry with materialdried (MgSO4)
  13. filtrationfiltered
  14. customthe solvent was evaporated
  15. customThe residue was crystallized from DIPE (1100 ml)
  16. filtrationThe precipitate was filtered off
  17. washwashed with DIPE
  18. customdried

Quellen und Nachweise

ORD-Eintrag
ord-b62c82ce4a9f497c902d1d7f12e1a2c2
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07087595B2

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