| 摘要 |
A process is disclosed for preparing carboxylic acid derivatives having the general formula (I), in which X stands for OR2 or NH2, R1 stands for C1-C20 alkyl, C1-C20 hydroxyalkyl, C3-C12-cycloalkyl, C4-C12 alkyl-cycloalkyl, C4-C12-cycloalkyl-alkyl, C5-C20 alkyl-cycloalkyl-alkyl, aryl, C7-C20 aralkyl, C7-C20 alkylaryl, an heteroaliphatic or heteroaromatic ring with 5 to 8 carbon atoms and R2 stands for C1-C20 alkyl, from carboxylic acid nitriles having the general formula (II) R1-CN, in which R1 has the above-mentioned meanings, and from alcohols having the general formula (III) R2-OH, in which R2 has the above-mentioned meanings. The reaction is carried out in the liquid phase at temperatures from 50 to 300 ~C and pressures from 0.1 to 350 bars in the presence of an heterogeneous catalyst.
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