Hydrochloric Acid → 2-Benzoyl-4,5-dimethoxybenzoic acid

HRID 1769121

Reaktionsgleichung

Reaktionsgleichung von HRID 1769121
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[O:11])[O:9][C:7](=[O:8])[C:6]2=[CH:12][C:13]=1[O:14][CH3:15].[C:16]1([Mg]Cl)[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.[Cl-].[NH4+].Cl>C1COCC1>[C:7]([C:6]1[CH:12]=[C:13]([O:14][CH3:15])[C:3]([O:2][CH3:1])=[CH:4][C:5]=1[C:10]([OH:9])=[O:11])(=[O:8])[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 25517Ammonium ChlorideHCID 6103565,6-Dimethoxy-1,3-dihydro-2-benzofuran-1,3-dioneHCID 178478979HCID 178478979, Verbindung

Produkt 1

HCID 199571592-Benzoyl-4,5-dimethoxybenzoic acidAusbeute 74,9 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

Thirty grams (0.14 mole) of 4,5-dimethoxyphthalic anhydride was suspended in 300 mL of THF and 87 mL (0.17 mole) of phenylmagnesium chloride in THF was added over two hours. The reaction was stirred at room temperature for 14 hours, refluxed for two hours, cooled and poured into saturated ammonium chloride. The mixture was made acidic with 6N HCl, extracted into chloroform, dried over magnesium sulfate, concentrated to provide 30 g of 2-benzoyl-4,5-dimethoxybenzoic acid.

Aufarbeitung

  1. temperaturerefluxed for two hours
  2. temperaturecooled
  3. extractionextracted into chloroform
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-1f0bae2485794e7ead1b1aede4b420fb
Quelldatensatz
uspto-grants-1995_01
Patentnummer
US05380721

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