Methyl iodide → Methyl 3-hydroxy-5-methoxybenzoate

HRID 1977471Notes

Reaction equation

HRID 1977471 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([OH:12])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].[C:13]([O-])([O-])=O.[K+].[K+].IC>CC(C)=O>[OH:1][C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([O:12][CH3:13])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 75076Methyl 3,5-Dihydroxybenzoate

Product 1

HCID 13941268Methyl 3-hydroxy-5-methoxybenzoateYield 37%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A suspension of methyl 3,5-dihydroxybenzoate (2.0 g, 11.9 mmol), K2CO3 (1.6 g, 11.9 mmol), and iodomethane (1.7 g, 11.9 mmol) in acetone (100 mL) was stirred at reflux. After stirring for three hours the mixture was partitioned between ethyl acetate and water. The organic layer was washed with brine, dried (MgSO4), filtered and concentrated. The residue was purified by column chromatography to yield the title compound as a white solid (0.813 g, 4.4 mmol). 1H NMR (400 MHz, CDCl3)δ7.16 (m, 1 H), 7.12 (m, 1 H), 6.61 (m, 1 H), 5.04 (s, 1 H), 3.91 (s, 3 H) 3.82 (s, 3 H).

Workup

  1. temperatureat reflux
  2. stirringAfter stirring for three hours the mixture
  3. customwas partitioned between ethyl acetate and water
  4. washThe organic layer was washed with brine
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by column chromatography

Sources & evidence

ORD record
ord-3d34ba8d6d6143baaec30adb3354bc1a
Source dataset
uspto-grants-2001_05
Patent number
US06232342B1

Reaction notes

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