Methanol → Methyl 2-(4-methylphenoxy)benzoate

HRID 847074Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 847074
[CH3:1][C:2]1[CH:17]=[CH:16][C:5]([O:6][C:7]2[CH:15]=[CH:14][CH:13]=[CH:12][C:8]=2[C:9]([OH:11])=[O:10])=[CH:4][CH:3]=1.S(=O)(=O)(O)O.[CH3:23]O>>[CH3:1][C:2]1[CH:17]=[CH:16][C:5]([O:6][C:7]2[CH:15]=[CH:14][CH:13]=[CH:12][C:8]=2[C:9]([O:11][CH3:23])=[O:10])=[CH:4][CH:3]=1

Komponenten

4

Edukt 3

HCID 887MethanolHCID 1118Sulfuric AcidHCID 5786562-(4-Methylphenoxy)benzoic acid

Produkt 1

HCID 618012Methyl 2-(4-methylphenoxy)benzoate

Versuchsvorschrift

A solution of 37.70 g of 2-(4-methylphenoxy)-benzoic acid was 12.0 mL of concentrated sulfuric acid in 500 mL of methanol was refluxed for 14 hours. After cooling, the reaction mixture was concentrated in vacuo and the residue was added to a mixture of methylene chloride and water. The organic phase was separated, washed with saturated sodium bicarbonate solution and brine, dried over anhydrous sodium sulfate, filtered, and concentrated. The crude product was kugelrohr distilled (120°-135°/0.025 torr) to furnish 35.08 g of methyl 2-(4-methylphenoxyl)benzoate, m.p. 31°-34°. NMR (200 MHz, CDCl3) δ7.87 (d, of d, 1H); 7.39 (t of d, 1H); 7.11 (m, 3H); 6.88 (m, 3H); 3.81 (s, 3H); 2.30 (s, 3H).

Aufarbeitung

  1. temperaturewas refluxed for 14 hours
  2. temperatureAfter cooling
  3. concentrationthe reaction mixture was concentrated in vacuo
  4. additionthe residue was added to a mixture of methylene chloride and water
  5. customThe organic phase was separated
  6. washwashed with saturated sodium bicarbonate solution and brine
  7. dry with materialdried over anhydrous sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. distillationThe crude product was kugelrohr distilled (120°-135°/0.025 torr)

Quellen und Nachweise

ORD-Eintrag
ord-de59bf7f8e64464194ac6f4c6bcb9e62
Quelldatensatz
uspto-grants-1992_08
Patentnummer
US05138069

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