Hydrochloric Acid → 4-Bromo-2-phenoxybenzoic acid

HRID 1987939Notes

Reaction equation

HRID 1987939 reaction equation
[Br:1][C:2]1[CH:9]=[CH:8]C(C#N)=[C:4]([O:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:3]=1.[OH-:17].[Na+].Cl.[CH3:20][CH2:21][OH:22]>>[Br:1][C:2]1[CH:9]=[CH:8][C:20]([C:21]([OH:17])=[O:22])=[C:4]([O:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:3]=1

Participants

5

Reactant 4

HCID 313Hydrochloric AcidHCID 702EthanolHCID 14798Sodium HydroxideHCID 574366654-Bromo-2-phenoxybenzonitrile

Product 1

HCID 230539204-Bromo-2-phenoxybenzoic acid

Procedure

Compound 5c (35.3 g, 129 mmol) was added to 130 mL EtOH, followed by the addition of 340 mL of 20% aqueous NaOH. The reaction was heated to reflux for 20 h. At that time the mixture was cooled to room temperature and poured into 6 N HCl. The solid was collected by vacuum filtration, dissolved in 3:1 THF-ethyl ether, and washed with brine. The organic phase was dried (MgSO4) and concentrated. The solids were dried in a vacuum oven at 60° C. overnight to give the desired compound 1b. MS m/z (MH+) 292.

Workup

  1. temperatureThe reaction was heated
  2. temperatureto reflux for 20 h
  3. filtrationThe solid was collected by vacuum filtration
  4. dissolutiondissolved in 3:1 THF-ethyl ether
  5. washwashed with brine
  6. dry with materialThe organic phase was dried (MgSO4)
  7. concentrationconcentrated
  8. customThe solids were dried in a vacuum oven at 60° C. overnight

Sources & evidence

ORD record
ord-b11b17c09ffc44cd8433b032984d8b6a
Source dataset
uspto-grants-2009_06
Patent number
US07553850B2

Reaction notes

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