Ethyl bromoacetate → HCID 17956300, Verbindung

HRID 899427Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 899427
[F:1][C:2]([F:24])([F:23])[CH2:3][O:4][CH2:5][CH2:6][O:7][CH2:8][CH2:9][O:10][CH2:11][CH2:12][O:13][CH2:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][OH:22].CC(C)([O-])C.[K+].Br[CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34]>C1(C)C=CC=CC=1>[F:1][C:2]([F:23])([F:24])[CH2:3][O:4][CH2:5][CH2:6][O:7][CH2:8][CH2:9][O:10][CH2:11][CH2:12][O:13][CH2:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][O:22][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34]

Komponenten

5

Edukt 3

HCID 7748Ethyl bromoacetateHCID 17956301HCID 17956301, VerbindungHCID 23665647Potassium tert-butoxide

Produkt 1

HCID 17956300HCID 17956300, VerbindungAusbeute 21,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

To a stirred solution of the product of step (d) (1.5 g) in toluene (30 ml) was added potassium t-butoxide (0.69 g) and the reaction stirred at room temperature for 3 hours. Ethyl bromoacetate (1.38 g) was added and the reaction was stirred at 130° C. for 48 hours. The solvent was removed in vacuo and the residue dissolved in dichloromethane (500 ml) and washed with water (2×400 ml). The organic layer was washed with brine (300 ml), dried and the solvent removed in vacuo. The residue was purified by column chromatography on silica gel (Biotage), eluting with 65-75% ethyl acetate in cyclohexane to give the title compound as a brown oil (0.40 g).

Aufarbeitung

  1. stirringthe reaction was stirred at 130° C. for 48 hours
  2. customThe solvent was removed in vacuo
  3. dissolutionthe residue dissolved in dichloromethane (500 ml)
  4. washwashed with water (2×400 ml)
  5. washThe organic layer was washed with brine (300 ml)
  6. customdried
  7. customthe solvent removed in vacuo
  8. customThe residue was purified by column chromatography on silica gel (Biotage)
  9. washeluting with 65-75% ethyl acetate in cyclohexane

Quellen und Nachweise

ORD-Eintrag
ord-2f8a0cd518944d88808625e9d1bb31b6
Quelldatensatz
uspto-grants-2008_04
Patentnummer
US07354966B2

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