Chlorosulfonic acid → HCID 69085790, compound

HRID 1427177Notes

Reaction equation

HRID 1427177 reaction equation
[C:1]1([CH3:20])[CH:6]=[CH:5][C:4]([S:7][C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([OH:16])=[O:15])[C:9]=2[C:17]([OH:19])=O)=[CH:3][CH:2]=1.ClS(O)(=O)=O>O>[CH3:20][C:1]1[CH:2]=[C:3]2[C:4]([S:7][C:8]3[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([OH:16])=[O:15])[C:9]=3[C:17]2=[O:19])=[CH:5][CH:6]=1

Participants

4

Reactant 2

HCID 24638Chlorosulfonic acidHCID 20269590HCID 20269590, compound

Product 1

HCID 69085790HCID 69085790, compoundYield 87.7%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

The 3-(p-tolylthio)benzene-1,2-dicarboxylic acid is slowly added to 18 g of chlorosulfonic acid cooling at 5 and 10° C. with an ice-bath. After 1 hour the mixture is poured in iced water. The precipitate is filtered, washed with water and dried obtaining 1.20 g (87.7%) of 7-methyl-9-oxo-9H-thioxanthene-1-carboxylic acid as a yellow solid.

Workup

  1. filtrationThe precipitate is filtered
  2. washwashed with water
  3. customdried

Sources & evidence

ORD record
ord-9660c8af9b944e27b3a1bcb3cc9acbe9
Source dataset
uspto-grants-2015_01
Patent number
US08933142B2

Reaction notes

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