Dipotassium 1,2-benzenedisulfonate → HCID 613180, compound

HRID 1977961Notes

Reaction equation

HRID 1977961 reaction equation
[K+].[K+].[C:3]1([S:13]([O-:16])(=[O:15])=[O:14])[C:4]([S:9]([O-:12])(=[O:11])=O)=[CH:5][CH:6]=[CH:7][CH:8]=1>S(=O)(=O)(O)O>[C:4]12[S:9](=[O:11])(=[O:12])[O:16][S:13](=[O:14])(=[O:15])[C:3]1=[CH:8][CH:7]=[CH:6][CH:5]=2

Participants

3

Reactant 1

HCID 6097177Dipotassium 1,2-benzenedisulfonate

Product 1

HCID 613180HCID 613180, compoundYield 50%

Reagents, catalysts & solvents 1

HCID 1118Sulfuric AcidSolvent

Conditions

Temperature
72.5 °C

Procedure

A mixture of 1,2-benzenedisulfonic acid dipotassium salt (20 g, 0.064 mol) in fuming sulfuric acid (100 mL) was heated at 70-75° C. overnight. The reaction mixture was slowly poured onto ice and the precipitate was quickly collected by filtration. The solid was treated with benzene (500 mL) and dried over anhydrous sodium sulfate. The solvent was filtered and evaporated to give the title compound as a crystalline solid (7.0 g, 50% yield), mp 182-3° C. 1H-NMR (300 MHz, CDCl3) δ8.02-8.09 (m, 4H).

Workup

  1. additionThe reaction mixture was slowly poured onto ice
  2. filtrationthe precipitate was quickly collected by filtration
  3. additionThe solid was treated with benzene (500 mL)
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationThe solvent was filtered
  6. customevaporated

Sources & evidence

ORD record
ord-cc15d290b3074cf9b3623a9dbe49917c
Source dataset
uspto-grants-2001_05
Patent number
US06235778B1

Reaction notes

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