Sulfur trioxide → 2-Methyl-5-nitrobenzenesulfonic acid

HRID 850903Notes

Reaction equation

HRID 850903 reaction equation
S(=O)(=O)=O.[N+:5]([C:8]1[CH:9]=[C:10]([S:15]([O:18]S(C2C(C)=CC=C([N+]([O-])=O)C=2)(=O)=O)(=[O:17])=[O:16])[C:11]([CH3:14])=[CH:12][CH:13]=1)([O-:7])=[O:6]>O>[N+:5]([C:8]1[CH:9]=[C:10]([S:15]([OH:18])(=[O:16])=[O:17])[C:11]([CH3:14])=[CH:12][CH:13]=1)([O-:7])=[O:6]

Participants

4

Reactant 2

HCID 24682Sulfur trioxideHCID 53855915p-Nitrotoluene-2-sulphonic acid anhydride

Product 1

HCID 84582-Methyl-5-nitrobenzenesulfonic acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

In this procedure, the reaction mixture is obtained as a black, tarry suspension towards the end of the addition of sulphur trioxide and, after hydrolysis of the p-nitrotoluene-2-sulphonic acid anhydride with water, an aqueous solution of p-nitrotoluene-2-sulphonic acid is formed from the suspension, and this is treated with active charcoal, before or after separating off water-insoluble by-products, in order to separate off dissolved, coloured compounds and dissolved, unreacted p-nitrotoluene.

Workup

  1. customIn this procedure, the reaction mixture is obtained as a black, tarry suspension

Sources & evidence

ORD record
ord-917da601c499486f9e330177f0ceb84f
Source dataset
uspto-grants-1983_05
Patent number
US04382039

Reaction notes

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