Ethyl Acetate → 3-Cyano-2-oxo-6-[3-(4-trifluoromethylphenyl)phenyl]heptane

HRID 440991Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 440991
[F:1][C:2]([F:23])([F:22])[C:3]1[CH:8]=[CH:7][C:6]([C:9]2[CH:10]=[C:11]([CH:15]([CH3:21])[CH2:16][CH2:17][CH2:18][C:19]#[N:20])[CH:12]=[CH:13][CH:14]=2)=[CH:5][CH:4]=1.C([Li])CCC.[C:29](OCC)(=[O:31])[CH3:30]>O1CCCC1>[C:19]([CH:18]([CH2:17][CH2:16][CH:15]([C:11]1[CH:12]=[CH:13][CH:14]=[C:9]([C:6]2[CH:5]=[CH:4][C:3]([C:2]([F:22])([F:23])[F:1])=[CH:8][CH:7]=2)[CH:10]=1)[CH3:21])[C:29](=[O:31])[CH3:30])#[N:20]

Komponenten

5

Edukt 3

HCID 8857Ethyl AcetateHCID 199555515-[3-(4-Trifluoromethylphenyl)phenyl]hexanenitrileHCID 178418339Butyllithium

Produkt 1

HCID 199555243-Cyano-2-oxo-6-[3-(4-trifluoromethylphenyl)phenyl]heptaneAusbeute 31,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
-78 °C

Versuchsvorschrift

Under a nitrogen atmosphere a stirred solution of 2.5 grams (0.008 mole) of 5-[3-(4-trifluoromethylphenyl)phenyl]hexanenitrile in 20 mL of tetrahydrofuran was cooled to about -78° C., and 3.2 mL (0.008 mole) of n-butyllithium (2.5 molar in hexane) was added dropwise. Upon completion of addition, the reaction mixture was stirred at -78° C. for 30 minutes, and then 1.1 grams (0.012 mole) of ethyl acetate was added dropwise. Upon completion of addition, the reaction mixture was allowed to warm to ambient temperature as it stirred for about 60 hours. The reaction mixture was partitioned between ethyl acetate and aqueous dilute hydro-chloric acid. The organic layer was dried with sodium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residue. The residue was subjected to column chromatography on silica gel, using 25% ethyl acetate in hexane as the eluant. The product-containing fractions were combined and concentrated under reduced pressure, yielding about 0.9 gram of 3-cyano-2-oxo- 6-[3-(4-trifluoromethylphenyl)phenyl]heptane. The NMR spectrum was consistent with the proposed structure.

Aufarbeitung

  1. additionUpon completion of addition
  2. additionUpon completion of addition
  3. temperatureto warm to ambient temperature as it
  4. stirringstirred for about 60 hours
  5. customThe reaction mixture was partitioned between ethyl acetate and aqueous dilute hydro-chloric acid
  6. dry with materialThe organic layer was dried with sodium sulfate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated under reduced pressure to a residue
  9. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-a5035996e2444599b0f46e3325f5682f
Quelldatensatz
uspto-grants-1996_05
Patentnummer
US05521192

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