2-Chlorothiophene → 5-Chlorothiophene-2,4-disulfonyl dichloride

HRID 1902998Notes

Reaction equation

HRID 1902998 reaction equation
[Cl:1][C:2]1[S:3][CH:4]=[CH:5][CH:6]=1.[Cl:7][S:8]([OH:11])(=O)=[O:9]>>[Cl:1][C:2]1[S:3][C:4]([S:8]([Cl:7])(=[O:11])=[O:9])=[CH:5][C:6]=1[S:8]([Cl:7])(=[O:11])=[O:9]

Participants

3

Reactant 2

HCID 72992-ChlorothiopheneHCID 24638Chlorosulfonic acid

Product 1

HCID 3504955-Chlorothiophene-2,4-disulfonyl dichloride

Conditions

Temperature
30 °C

Procedure

2-Chlorothiophene (40 g) was added to stirred chlorosulphonic acid (400 ml) over a five minute period. The solution was then heated at 80°-90° C. for four hours, cooled to 30° C., and added to ice-water with stirring. The product was filtered off, washed with water and dried. The yield was 84 g.

Workup

  1. temperatureThe solution was then heated at 80°-90° C. for four hours
  2. filtrationThe product was filtered off
  3. washwashed with water
  4. customdried

Sources & evidence

ORD record
ord-a73bbfb1fb5c4648af38db1b93a80e45
Source dataset
uspto-grants-1984_03
Patent number
US04435320

Reaction notes

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