Reaktion #1768

Reaktionsgleichung

HCl

methyl 4-hydroxy-2-methoxybenzoate

H2O

LiOH.H2O

→

4-hydroxy-2-methoxybenzoic acid

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   ExtraktionThe reaction solution was extracted with CH2Cl2 (3×50 mL)
2. 2
   TrocknenThe organic phase was dried (MgSO4)
3. 3
   Filtrationfiltered
4. 4
   SonstigeThe solvent was evaporated under reduced pressure

Vorschrift

To a stirred solution of methyl 4-hydroxy-2-methoxybenzoate (11 g, 60 mmol) in THF:H2O (100 mL:10 mL) was added LiOH.H2O (3 g, 71 mmol). The solution was stirred over 24 h and then made slightly acidic (pH 5) with 10% HCl (approx 15 mL). The reaction solution was extracted with CH2Cl2 (3×50 mL). The organic phase was dried (MgSO4) and filtered. The solvent was evaporated under reduced pressure to afford the 4-hydroxy-2-methoxybenzoic acid as a clean white foam.

Quelle