2-(Bromomethyl)acrylic acid ethyl ester → Ethyl 2-(methoxymethyl)prop-2-enoate

HRID 10356

Reaktionsgleichung

Reaktionsgleichung von HRID 10356
Br[CH2:2][C:3](=[CH2:9])[C:4]([O:6][CH2:7][CH3:8])=[O:5].[CH3:10][O-:11].[Na+]>CO.O>[CH2:7]([O:6][C:4](=[O:5])[C:3]([CH2:2][O:11][CH3:10])=[CH2:9])[CH3:8]

Komponenten

5

Edukt 2

HCID 3106202-(Bromomethyl)acrylic acid ethyl esterHCID 10942334Sodium Methoxide

Produkt 1

HCID 20770134Ethyl 2-(methoxymethyl)prop-2-enoateAusbeute 28,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittel2×HCID 962WaterLösungsmittel

Versuchsvorschrift

A solution of ethyl α-(bromomethyl)acrylate (0.99 g, 5.1 mmol [Villieras J., Rambaud M., Synthesis, 1982:924–926]) in methanol (10 mL) is added to an ice-cold solution of sodium methoxide (0.33 g, 6.1 mmol) in methanol (50 mL). The suspension is refluxed for 21 hours, cooled, diluted with water and extracted with dichloromethane. The organic extracts are dried over Na2SO4, filtered and concentrated under vacuum. The resulting residue is purified by flash column chromatography (1:5 ethyl acetate/hexanes) to afford the title compound (0.211 g). 1H NMR (200 MHz, CDCl3): δ 6.33–6.26 (m, 1H), 5.88–5.80 (m, 1H), 4.23 (q, 2H), 4.19–4.10 (m, 2H), 3.41 (s, 3H), 1.31 (t, 3H).

Aufarbeitung

  1. temperatureThe suspension is refluxed for 21 hours
  2. temperaturecooled
  3. extractionextracted with dichloromethane
  4. dry with materialThe organic extracts are dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under vacuum
  7. customThe resulting residue is purified by flash column chromatography (1:5 ethyl acetate/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-bda05e49b0404071a41e804aec975155
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07094780B1

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