Methanol → Methyl 4-formyl-3-hydroxybenzoate

HRID 1799856Notes

Reaction equation

HRID 1799856 reaction equation
[CH:1]([C:3]1[CH:11]=[CH:10][C:6]([C:7]([OH:9])=[O:8])=[CH:5][C:4]=1[OH:12])=[O:2].S(Cl)(Cl)=O.[CH3:17]O>>[CH:1]([C:3]1[CH:11]=[CH:10][C:6]([C:7]([O:9][CH3:17])=[O:8])=[CH:5][C:4]=1[OH:12])=[O:2]

Participants

4

Reactant 3

HCID 887MethanolHCID 24386Thionyl ChlorideHCID 3175084-Formyl-3-hydroxybenzoic acid

Product 1

HCID 14395860Methyl 4-formyl-3-hydroxybenzoateYield 85%

Procedure

4-Formyl-3-hydroxybenzoic acid (5 g, 30 mmol) was suspended in methanol (70 mL), and treated with thionyl chloride (3.29 mL 45 mmol) dropwise. The mixture was heated to reflux overnight. Concentrated to dryness, and 50 mL of toluene was added, and concentrated again. The residue was recrystallized from ethyl acetate-hexane. A total of 4.8 g (85%) of methyl 4-formyl-3-hydroxybenzoate was obtained.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux overnight
  3. concentrationConcentrated to dryness, and 50 mL of toluene
  4. additionwas added
  5. concentrationconcentrated again
  6. customThe residue was recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-6f25b9887d21422486e45a199cc04d64
Source dataset
uspto-grants-2013_01
Patent number
US08343955B2

Reaction notes

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