Process for preparing 4,5-dichloro-2-methylbenzoic acid

Details Process for preparing 4,5-dichloro-2-methylbenzoic acid Process for preparing 4,5-dichloro-2-methylbenzoic acid

Category

C - Chemistry, Metallurgy

Subcategory

07

Subsubcategory

C

IPC codes

C07C 63/70 (2006.01) C07C 49/76 (2006.01) C07C 49/80 (2006.01) C07C 51/245 (2006.01) C07C 51/29 (2006.01) C07C 51/373 (2006.01)

Type

Patent

Patent number

CA 2204201

Description

The present invention relates to a process for preparing 4,5-dichloro-2- methylbenzoic acid and also its salts in high yields and in high purities by reacting 3,4-dichlorotoluene with acetyl chloride or chloroacetyl chloride in the presence of a Friedel-Crafts catalyst and subsequently oxidizing the acetylated intermediate to give the carboxylic acid.

Méthode pour préparer avec des rendements élevés l'acide 4,5-dichloro-2-méthylbenzoïque et ses sels de grande pureté, par réaction du 3,4-dichlorotoluène avec du chlorure d'acétyle ou de chloroacétyle en présence d'un catalyseur Friedel-Crafts, et par oxydation ultérieure de l'intermédiaire acétylé en acide carboxylique.

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