Methyl cyanoacetate → 2-Cyano-3-methyl-4-oxo-4-(2-trifluoromethyl-phenyl)-butyric acid methyl ester
Reaktionsgleichung
[H-].[Na+].[C:3]([CH2:5][C:6]([O:8][CH3:9])=[O:7])#[N:4].Br[CH:11]([CH3:24])[C:12]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[C:20]([F:23])([F:22])[F:21])=[O:13]>C1COCC1>[CH3:9][O:8][C:6](=[O:7])[CH:5]([C:3]#[N:4])[CH:11]([CH3:24])[C:12](=[O:13])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[C:20]([F:21])([F:22])[F:23]Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 20 °C
Versuchsvorschrift
To a suspension of NaH (60%, 2.88 g, 72 mmol) in anhyd THF (200 mL) was added methyl cyanoacetate (4.5 mL, 50 mmol). After this mixture was stirred for 3 h at 20° C., a solution of 2-bromo-1-(2-trifluoromethyl-phenyl)-propan-1-one (13.5 g, 48 mmol) was added and the mixture was stirred overnight at 20° C. The mixture was quenched with water and the organic layer was separated. The aqueous layer was extracted with EtOAc. The combined extracts were washed with brine, dried (anhyd Na2SO4) and concentrated under reduced pressure to afford the title compound as an oil (13.3 g, 93%), which was used in the next step without purification. MS (ES): 300 (MH+).
Aufarbeitung
- stirringthe mixture was stirred overnight at 20° C
- customThe mixture was quenched with water
- customthe organic layer was separated
- extractionThe aqueous layer was extracted with EtOAc
- washThe combined extracts were washed with brine
- dry with materialdried (anhyd Na2SO4)
- concentrationconcentrated under reduced pressure
Quellen und Nachweise
- ORD-Eintrag
- ord-a3a00388fd38447484558a00fb642afc
- Quelldatensatz
- uspto-grants-2011_09
- Patentnummer
- US08026237B2
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