Acetic acid, 2-(triphenylphosphoranylidene)-, methyl ester → Methyl 3-(3-bromophenyl)prop-2-enoate

HRID 565976

Reaktionsgleichung

Reaktionsgleichung von HRID 565976
[Br:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][CH:9]=1)[CH:5]=O.[CH3:10][O:11][C:12]([CH:14]=P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)=[O:13]>C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][CH:9]=1)[CH:5]=[CH:14][C:12]([O:11][CH3:10])=[O:13]

Komponenten

4

Edukt 2

HCID 17453Acetic acid, 2-(triphenylphosphoranylidene)-, methyl esterHCID 765833-Bromobenzaldehyde

Produkt 1

HCID 610698Methyl 3-(3-bromophenyl)prop-2-enoateAusbeute 82,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

To a mixture of 3-bromobenzaldehyde (10 g) and methoxy-carbonylmethylenetriphenylphosphine (20 g) was added toluene (150 ml), and the mixture was refluxed under nitrogen atmosphere for 2 hours. The solvent was evaporated, and the organic layer was washed with water and saturated sodium chloride solution, and dried with anhydrous magnesium sulfate. Under reduced pressure, the solvent was evaporated, and the residue was purified with silica gel column (ethyl acetate/hexane) to give methyl 3-bromocinnamate (10.7 g) as colorless crystals.

Aufarbeitung

  1. temperaturethe mixture was refluxed under nitrogen atmosphere for 2 hours
  2. customThe solvent was evaporated
  3. washthe organic layer was washed with water and saturated sodium chloride solution
  4. dry with materialdried with anhydrous magnesium sulfate
  5. customUnder reduced pressure, the solvent was evaporated
  6. customthe residue was purified with silica gel column (ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-65c2babea8e342569f6c0af4febad92b
Quelldatensatz
uspto-grants-2001_01
Patentnummer
US06172061B2

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