Hydrochloric Acid → 2-Tert-butyl-4-bromo-5-nitrophenol

HRID 1727568Notes

Reaction equation

HRID 1727568 reaction equation
C(=O)([O:4][C:5]1[CH:10]=[C:9]([N+:11]([O-:13])=[O:12])[C:8]([Br:14])=[CH:7][C:6]=1[C:15]([CH3:18])([CH3:17])[CH3:16])OC.[OH-].[K+].Cl>CO>[C:15]([C:6]1[CH:7]=[C:8]([Br:14])[C:9]([N+:11]([O-:13])=[O:12])=[CH:10][C:5]=1[OH:4])([CH3:18])([CH3:16])[CH3:17]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 574702354-Bromo-2-(tert-butyl)-5-nitrophenyl methyl carbonate

Product 1

HCID 574702362-Tert-butyl-4-bromo-5-nitrophenolYield 99.7%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of methyl (2-tert-butyl-4-bromo-5-nitrophenyl) carbonate (121.5 g, 0.366 mol) in methanol (1000 mL) was added potassium hydroxide (30.75 g, 0.549 mol ) in portions. After addition, the mixture was stirred at room temperature for 3 h and acidified with 1N HCl to pH 7. Methanol was removed and water was added. The mixture was extracted with ethyl acetate and the organic layer was separated, dried over Na2SO4 and concentrated to give 2-tert-butyl-4-bromo-5-nitro-phenol (C-14-a) (100 g, 99%).

Workup

  1. additionAfter addition
  2. customMethanol was removed
  3. additionwater was added
  4. extractionThe mixture was extracted with ethyl acetate
  5. customthe organic layer was separated
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-7fe8fcec4eb348a6a51b4ad33e40e2a6
Source dataset
uspto-grants-2009_02
Patent number
US07495103B2

Reaction notes

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