Water → Methyl 2-(2-(benzyloxy)phenyl)-3-methoxyacrylate

HRID 1086993

Reaktionsgleichung

Reaktionsgleichung von HRID 1086993
[OH:1][CH:2]=[C:3]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[O:14][CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:4]([O:6][CH3:7])=[O:5].[C:22](=O)([O-])[O-].[K+].[K+].S(OC)(OC)(=O)=O.O>CN(C=O)C>[CH3:22][O:1]/[CH:2]=[C:3](\[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[O:14][CH2:15][C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1)/[C:4]([O:6][CH3:7])=[O:5].[CH2:15]([O:14][C:9]1[CH:10]=[CH:11][CH:12]=[CH:13][C:8]=1[CH2:3][C:4]([O:6][CH3:7])=[O:5])[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

Komponenten

7

Edukt 4

HCID 962WaterHCID 6497Dimethyl SulfateHCID 11430Potassium CarbonateHCID 69942437Methyl 2-(2'-benzyloxyphenyl)-3-hydroxyacrylate

Produkt 2

HCID 838698Methyl 2-(2-(benzyloxy)phenyl)-3-methoxyacrylateHCID 11076055Methyl 2-(2-(benzyloxy)phenyl)acetate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

The crude methyl 3-hydroxy-2-(2'-benzyloxyphenyl)propenoate was dissolved in dry DMF (100 ml) and potassium carbonate (29.0 g) was added in one portion. Dimethyl sulphate (16.00 g) in dry DMF (10 ml) was then added dropwise with stirring. After ninety minutes, water (300 ml) was added and the solution was extracted with ether (2 x 300 ml). After washing with water (3 x 150 ml) and brine, the extracts were dried and concentrated under reduced pressure, and the resulting yellow oil solidified on trituration with ether/petrol. Recrystallization from dry methanol afforded E-methyl 3-methoxy-2-(2'-benzyloxyphenyl)propenoate as a white, crystalline solid (5.44g, 17% yield from methyl 2-benzyloxyphenylacetate), M.P. 76-77° C.; infrared maxima (nujol mull): 1710, 1640 cm-1 ; 1H nmr (CDCl3, 90MHz): delta 3.63 (3H,s), 3.75 (3H,s), 5.05 (2H,s), 6.80-7.40 (9H,m), 7.50 (1H,s)ppm.

Aufarbeitung

  1. waitAfter ninety minutes
  2. extractionthe solution was extracted with ether (2 x 300 ml)
  3. washAfter washing with water (3 x 150 ml) and brine
  4. customthe extracts were dried
  5. concentrationconcentrated under reduced pressure
  6. customRecrystallization from dry methanol

Quellen und Nachweise

ORD-Eintrag
ord-a1c0d762440c4a9c8b15d14b0891577c
Quelldatensatz
uspto-grants-1991_07
Patentnummer
US05034388

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