Chlorine → Benzenesulfonic acid, 3,5-dichloro-2-hydroxy-4-methyl-

HRID 259500

Reaktionsgleichung

Reaktionsgleichung von HRID 259500
[S:1]([C:5]1[CH:10]=[C:9]([Cl:11])[C:8]([CH3:12])=[CH:7][C:6]=1[OH:13])([OH:4])(=[O:3])=[O:2].[Cl:14]Cl>O.S(=O)(=O)(O)O>[S:1]([C:5]1[CH:10]=[C:9]([Cl:11])[C:8]([CH3:12])=[C:7]([Cl:14])[C:6]=1[OH:13])([OH:4])(=[O:2])=[O:3]

Komponenten

5

Edukt 2

HCID 24526ChlorineHCID 110423235-Chloro-2-hydroxy-4-methylbenzenesulfonic acid

Produkt 1

HCID 3085507Benzenesulfonic acid, 3,5-dichloro-2-hydroxy-4-methyl-

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 1118Sulfuric AcidLösungsmittel

Versuchsvorschrift

According to the present invention there is provided a process for preparing 2-nitro-4,6-dichloro-5-methylphenol comprising sulphonation of 4-chloro-5-methyl-phenol with concentrated sulphuric acid at elevated temperature to form 2-sulpho-4-chloro-5-methylphenol, thereafter diluting the reaction mixture with water to a sulphuric acid content of 20 to 30%, chlorinating the resulting 2-sulpho-4-chloro-5-methylphenol with chlorine at elevated temperature and normal or elevated pressure to form 2-sulpho-4,6-dichloro-5-methylphenol and reacting the 2-sulpho-4,6-dichloro-5-methylphenol with nitric acid.

Quellen und Nachweise

ORD-Eintrag
ord-09feb9d7608640ee86a452d8fc64deb8
Quelldatensatz
uspto-grants-1977_07
Patentnummer
US04038328

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