Ethyl trifluoroacetate → 4,4,4-Trifluoro-1-(4-fluorophenyl)butane-1,3-dione

HRID 83260

Reaktionsgleichung

Reaktionsgleichung von HRID 83260
[F:1][C:2]([F:9])([F:8])[C:3]([O:5]CC)=O.C[O-].[Na+].[CH3:13][C:14]([C:16]1[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=1)=[O:15]>C(OC)(C)(C)C.Cl>[F:9][C:2]([F:1])([F:8])[C:3](=[O:5])[CH2:13][C:14]([C:16]1[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=1)=[O:15]

Komponenten

6

Edukt 3

HCID 9794Ethyl trifluoroacetateHCID 98284'-FluoroacetophenoneHCID 10942334Sodium Methoxide

Produkt 1

HCID 27714764,4,4-Trifluoro-1-(4-fluorophenyl)butane-1,3-dioneAusbeute 97 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 313Hydrochloric AcidLösungsmittelHCID 15413tert-Butyl methyl etherLösungsmittel

Versuchsvorschrift

To a solution of ethyl trifluoroacetate (23.9 mL, 199 mmol) in tertbutylmethylether (230 mL) containing sodium methoxide (5.4 M, 39.6 mL, 214 mmol) was added 4-fluoroacetophenone (25 g, 181 mmol) and the resulting mixture stirred at room temperature for 3 h and then poured into ice-water. The mixture was then diluted with HCl (2 N, 200 mL) and then extracted with ethyl acetate. The combined organic extracts were then dried over sodium sulfate and evaporated to afford the title compound (40.9 g, 97%) which was obtained as an orange oil. MS: m/e=232.9 [M−H]−.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. dry with materialThe combined organic extracts were then dried over sodium sulfate
  3. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-4e71d25699d645ea9ee27e25ce4d5f72
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846719B2

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