4-Chlorophenol → 5-Chloro-2-hydroxybenzene-1-sulfonyl chloride

HRID 1788352Notes

Reaction equation

HRID 1788352 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=1.[Cl:9][S:10](O)(=[O:12])=[O:11]>O>[OH:8][C:5]1[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][C:4]=1[S:10]([Cl:9])(=[O:12])=[O:11]

Participants

4

Reactant 2

HCID 46844-ChlorophenolHCID 24638Chlorosulfonic acid

Product 1

HCID 3043845-Chloro-2-hydroxybenzene-1-sulfonyl chlorideYield 30.4%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
25 °C

Procedure

4-Chlorophenol (4 g, 31.25 mmol) was added in portions to chlorosulfonic acid (10.3 mL, 156 mmol) while cooling in an ice bath. The resulting solution was stirred at 25° C. for 20 hrs. This was then added drop-wise to ice and water resulting in an emulsion. This was extracted with CHCl3, dried (Na2SO4) and concentrated in vacuo. Heptane was added and evaporated and replaced with cyclohexane. The resulting mixture was filtered and concentrated to give the title compound as an oil (2.16 g).

Workup

  1. temperaturewhile cooling in an ice bath
  2. extractionThis was extracted with CHCl3
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated in vacuo
  5. additionHeptane was added
  6. customevaporated
  7. filtrationThe resulting mixture was filtered
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-61ea217eb45e40da9da272363ff1fda8
Source dataset
uspto-grants-2009_03
Patent number
US07511175B2

Reaction notes

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