o-Fluorobenzaldehyde → (E)-ethyl 3-(2-fluorophenyl)-2-methylacrylate

HRID 514658Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 514658
[F:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH:4]=O.[C:10]([CH2:15][CH:16]=P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)([O:12][CH2:13][CH3:14])=[O:11]>C1(C)C=CC=CC=1>[F:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1/[CH:4]=[C:15](\[CH3:16])/[C:10]([O:12][CH2:13][CH3:14])=[O:11]

Komponenten

4

Edukt 2

HCID 67970o-FluorobenzaldehydeHCID 12607919Ethyl 3-(triphenyl-lambda~5~-phosphanylidene)propanoate

Produkt 1

HCID 86632357(E)-ethyl 3-(2-fluorophenyl)-2-methylacrylateAusbeute 126 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

2-Fluorobenzaldehyde (5.0 g, 40.3 mmol) was dissolved in 150 mL toluene. (Carboethoxyethylidene)triphenylphosphorane (42 g; 116 mmol) was added and the mixture was heated to reflux overnight. The solution was cooled, diluted with hexanes, and the solid was filtered. The filtrate was evaporated in vacuo, then dissolved in ether and filtered through a plug of silica gel using ether as eluent. The solvents were evaporated in vacuo to afford the title compound (10.57 g) as a yellow solid. 1H NMR (300 MHz, CDCl3) δ ppm 7.70 (s, 1H), 7.26-7.38 (m, 3H), 7.17 (m, 2H), 4.28 (q, J=7.12 Hz, 2H), 2.04 (s, 3H), 1.35 (t, J=7.12 Hz, 3H).

Aufarbeitung

  1. temperaturethe mixture was heated
  2. temperatureto reflux overnight
  3. temperatureThe solution was cooled
  4. filtrationthe solid was filtered
  5. customThe filtrate was evaporated in vacuo
  6. dissolutiondissolved in ether
  7. filtrationfiltered through a plug of silica gel
  8. customThe solvents were evaporated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-f4119feedcc4419c9ef41bf244ac39c9
Quelldatensatz
uspto-grants-2015_08
Patentnummer
US09108905B2

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