Methanol → 4-Acetoxy-2-methoxy-benzoic acid methyl ester

HRID 603975Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 603975
CO.[CH3:3][O:4][C:5](=[O:17])[C:6]1[CH:11]=[CH:10][C:9]([O:12][C:13](=[O:15])[CH3:14])=[CH:8][C:7]=1[OH:16].[CH:18]1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCOC(/N=N/C(OCC)=O)=O>ClCCl>[CH3:3][O:4][C:5](=[O:17])[C:6]1[CH:11]=[CH:10][C:9]([O:12][C:13](=[O:15])[CH3:14])=[CH:8][C:7]=1[O:16][CH3:18]

Komponenten

6

Edukt 4

HCID 887MethanolHCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 579902174-Acetoxy-2-hydroxy-benzoic acid methyl ester

Produkt 1

HCID 534162044-Acetoxy-2-methoxy-benzoic acid methyl esterAusbeute 106,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

MeOH (0.3 mL, 7.4 mmol) was added to the product from step 1 (0.962 g, 4.6 mmol), Ph3P (1.79 g, 6.8 mmol), and dichloromethane (10 mL). Then DEAD (1.32 mL, 8.4 mmol) was added to the reaction. Reaction was stirred at room temperature for 4 days. Reaction solution was concentrated by rotary evaporation and the resulting residue was purified with silica gel prep plates and 1:3 EtOAc/Hexane as eluent. Obtained 1.10 g of 4-Acetoxy-2-methoxy-benzoic acid methyl ester in quantitative yield.

Aufarbeitung

  1. customReaction
  2. customReaction solution
  3. concentrationwas concentrated by rotary evaporation
  4. customthe resulting residue was purified with silica gel prep plates and 1:3 EtOAc/Hexane as eluent

Quellen und Nachweise

ORD-Eintrag
ord-9d63600590274886bbe9a53d633a8d8e
Quelldatensatz
uspto-grants-2011_03
Patentnummer
US07906548B2

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