Water → (2S)-2-[(R)-[(4-bromophenyl)-(4-fluorophenyl)-methyl]-amino}-4-methylpentan-1-ol
Reaktionsgleichung
Br[C:2]1[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][CH:3]=1.C([Li])CCC.[F:14][C:15]1[CH:29]=[CH:28][C:18]([CH:19]=[N:20][CH:21]([CH2:24][CH:25]([CH3:27])[CH3:26])[CH2:22][OH:23])=[CH:17][CH:16]=1.O>CCOCC>[Br:8][C:5]1[CH:6]=[CH:7][C:2]([C@H:19]([NH:20][C@@H:21]([CH2:24][CH:25]([CH3:27])[CH3:26])[CH2:22][OH:23])[C:18]2[CH:17]=[CH:16][C:15]([F:14])=[CH:29][CH:28]=2)=[CH:3][CH:4]=1Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
To a solution of 1,4-dibromobenzene (11.4 g, 48.35 mmol) in ether (120 mL) at −30° C. was added n-butyllithium (24.2 mL, 2.0M cyclohexane solution) over 10 minutes. The reaction mixture was stirred for 45 minutes, whereupon a solution of (S) 2-[(4-fluorobenzylidene)-amino]-4-methylpentan-1-ol (maximum 2.16 g, 9.67 mmol from the previous step) in ether (30 mL) was added dropwise. After 2 hours, during which the reaction mixture was allowed to warm to 0° C., water (200 mL) was added. The product was extracted with ethyl acetate (150 mL), washed with brine (100 mL), dried over MgSO4, filtered, concentrated in vacuo, and purified on a short plug of silica gel (20% ethyl acetate/hexane elution) to give (2S)-2-{(R)-[(4-bromophenyl)-(4-fluorophenyl)-methyl]-amino}-4-methylpentan-1-ol.
Aufarbeitung
- additionwas added dropwise
- extractionThe product was extracted with ethyl acetate (150 mL)
- washwashed with brine (100 mL)
- dry with materialdried over MgSO4
- filtrationfiltered
- concentrationconcentrated in vacuo
- custompurified on a short plug of silica gel (20% ethyl acetate/hexane elution)
Quellen und Nachweise
- ORD-Eintrag
- ord-1d3195408afd430cb0d6c59c0d9f5003
- Quelldatensatz
- uspto-grants-2011_07
- Patentnummer
- US07973037B2
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