Ethanol → Ethyl 4-bromo-3-methylbenzoate

HRID 2197381Notes

Reaction equation

HRID 2197381 reaction equation
[Br:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][C:3]=1[CH3:11].S(Cl)(Cl)=O.[CH3:16][CH2:17]O>>[CH2:16]([O:7][C:6](=[O:8])[C:5]1[CH:9]=[CH:10][C:2]([Br:1])=[C:3]([CH3:11])[CH:4]=1)[CH3:17]

Participants

4

Reactant 3

HCID 702EthanolHCID 24386Thionyl Chloride2×HCID 821314-Bromo-3-methylbenzoic acid

Product 1

HCID 21729626Ethyl 4-bromo-3-methylbenzoate

Procedure

To 4-bromo-3-methylbenzoic acid (3 g, 14 mmol) in EtOH (200 mL) was added thionyl chloride (2 mL, 28 mmol), and the reaction was stirred for 10 minutes. Additional thionyl chloride (3 mL, 35 mmol) was added, and the reaction was stirred overnight at 50° C. After cooling to room temperature, the mixture was quenched with the slow addition of powdered Na2CO3, and then filtered and concentrated. The residue was partitioned between EtOAc and H2O, and the organic layer was dried, filtered, and concentrated to give the title compound.

Workup

  1. stirringthe reaction was stirred overnight at 50° C
  2. customthe mixture was quenched with the slow addition of powdered Na2CO3
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue was partitioned between EtOAc and H2O
  6. customthe organic layer was dried
  7. filtrationfiltered
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-4969438d10c4416bb534b2932a463801
Source dataset
uspto-grants-2012_12
Patent number
US08338484B2

Reaction notes

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