| 摘要 |
The preparation of amines of the formula (I):in which R<1>, R<2>, R<3 >and R<4>, independently of one another, are hydrogen, straight-chain or branched C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, takes place by catalytic, reductive amination of mixtures comprising carbonyl compounds of the formula (II) and/or alcohols of the formula (III)which also comprise at least 50 ppm, based on the mixtures, of halogen, with nitrogen compounds of the formula (IV):with the abovementioned meanings for R<1 >to R<4>, in the presence of Co- and/or Ni-containing catalysts, which comprises carrying out the reductive amination additionally in the presence of solid acidic cocatalysts.
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