Process for the preparation of hydroxycarboxanilides

Details Process for the preparation of hydroxycarboxanilides Process for the preparation of hydroxycarboxanilides

Category

C - Chemistry, Metallurgy

Subcategory

07

Subsubcategory

C

IPC codes

C07C 235/16 (2006.01) C07C 231/12 (2006.01) C07C 253/30 (2006.01) C07C 255/60 (2006.01)

Type

Patent

Patent number

CA 2152431

Description

The present invention relates to a process for the preparation of hydroxycarboxanilides of the formula (1) Image (1), in which R1 and R2 are identical or different and are hydrogen, halogen, a nitro group, a cyano group, a straight-chain or branched alkyl, alkenyl, alkynyl or alkoxy group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, a cycloalkyl group having 6 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, R3 is hydrogen or a straight-chain or branched alkyl group having 1 to 12 carbon atoms and n is an integer from 1 to 12, by reacting a halocarboxanilide of the formula (2) Image (2), in which R1, R2, R3 and n have the same meaning as in formula (1) and Hal is chlorine, bromine or iodine, with a basic compound in a solvent mixture comprising water and one or more polar aprotic solvents at a temperature of 40 to 180°C.

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