C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 235/16 (2006.01) C07C 231/02 (2006.01) C07C 253/30 (2006.01) C07C 255/60 (2006.01)
Patent
CA 2180812
The present invention relates to a process for the preparation of hydroxycarboxylic acid amides of the general formula (1): Image (1) in which R1 and R2 are identical or different and are hydrogen, halogen, cyano, a linear 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 linear or branched alkyl group having 1 to 4 carbon atoms, R4 is hydrogen or a linear or branched alkyl group having 1 to 6 carbon atoms, or R3 and R4, together with the carbon atom to which they are attached, form a five- or six-membered cycloalkane ring, and n is an integer from 1 to 12, wherein an aniline of the general formula (2) Image (2) in which R1, R2, R3 and R4 are as defined in the formula (1), is reacted with a hydroxycarboxylic acid of the general formula (3) Image (3) in which n is as defined in the formula (1), in the presence or absence of an inert solvent, at 150 to 250°C, and the constituents which are volatile under the reaction conditions are distilled out of the reaction mixture.
Dierdorf Andreas
Papenfuhs Theodor
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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