2,5-Dichlorophenol → 1,2,4-Trichlorobenzene

HRID 1833937Notes

Reaction equation

HRID 1833937 reaction equation
Br[C:2]1[C:7]([Cl:8])=[CH:6][C:5](O)=[C:4]([Cl:10])[CH:3]=1.[Cl:11]C1C=CC(Cl)=CC=1O.ClC1C=C(Cl)C=CC=1O>>[Cl:10][C:4]1[CH:3]=[CH:2][C:7]([Cl:8])=[CH:6][C:5]=1[Cl:11]

Participants

4

Reactant 3

HCID 662,5-DichlorophenolHCID 84492,4-DichlorophenolHCID 160224-Bromo-2,5-dichlorophenol

Product 1

HCID 131,2,4-Trichlorobenzene

Procedure

A process for the preparation of 4-bromo-2,5-dichlorophenol which comprises reacting a mixture of 2,5-dichlorophenol and 2,4-dichlorophenol obtained by saponifying 1,2,4-trichlorobenzene and distilling 3,4-dichlorophenol from the resulting mixture, with an equimolar amount of bromine in a glacial acetic acid reaction medium at a temperature of about 30° C. and thereafter recovering the 4-bromo-2,5-dichlorophenol.

Sources & evidence

ORD record
ord-2a685b9601db4566bc56613816c67c42
Source dataset
uspto-grants-1978_01
Patent number
US04067913

Reaction notes

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