Methanol → Methyl 3-bromo-4-hydroxybenzoate

HRID 1662364Notes

Reaction equation

HRID 1662364 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][C:10]=1[OH:11])[C:5]([OH:7])=[O:6].S(=O)(=O)(O)O.[CH3:17]O>>[Br:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][C:10]=1[OH:11])[C:5]([O:7][CH3:17])=[O:6]

Participants

4

Reactant 3

HCID 887MethanolHCID 1118Sulfuric AcidHCID 843683-Bromo-4-hydroxybenzoic acid

Product 1

HCID 4778958Methyl 3-bromo-4-hydroxybenzoateYield 100%

Conditions

Temperature
80 °C

Procedure

To a stirred solution of 3-bromo-4-hydroxybenzoic acid (66.6D) (available from Alfa Aesar, Avocado, Lancaster) (50.0 g, 231 mmol) in MeOH (300 mL) was added a cold solution of sulfuric acid (2.50 mL, 47 mmol). The mixture was heated to 80° C. and monitored by TLC. After 16.5 hours, the solvent was removed and the reaction mixture was diluted with EtOAc. The organic phase was washed carefully two times with saturated aqueous NaHCO3, once with brine, and then dried over anhydrous sodium sulfate. After filtration, the organic solvent was removed in vacuo to yield 66.6E as a white solid (yield 100%) that was used without purification.

Workup

  1. customthe solvent was removed
  2. additionthe reaction mixture was diluted with EtOAc
  3. washThe organic phase was washed carefully two times with saturated aqueous NaHCO3
  4. dry with materialonce with brine, and then dried over anhydrous sodium sulfate
  5. filtrationAfter filtration
  6. customthe organic solvent was removed in vacuo

Sources & evidence

ORD record
ord-55f04a5697194f15ac91a67969b1e931
Source dataset
uspto-grants-2011_10
Patent number
US08030354B2

Reaction notes

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