Preparation of 3-aminopropionitriles
AssigneeBASF SE
InventorsMartin Brudermueller, Tom Witzel, Franz Merger
Life of this patent
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Abstract
3-Aminopropionitriles of the general formula I ##STR1## where R.sup.1,R.sup.2,R.sup.3,R.sup.4 and R.sup.5 independently of one another are each hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.8 -aminoalkyl, C.sub.1 -C.sub.8 -cyanoalkyl, C.sub.3 -C.sub.20 -cycloalkyl, C.sub.7 -C.sub.20 -aralkyl or aryl, are prepared by a process in which an amine of the general formula II ##STR2## is reacted with an acrylonitrile of the general formula III ##STR3## where the substituents have the abovementioned meanings, in a molar ratio of from 0.9:1 to 100:1 over a heterogeneous catalyst at from 40.degree. to 200.degree. C. and from 1 to 350 bar.
Claims7
A process for the preparation of a 3-aminopropionitrile of the formula ##STR7## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, independently of one another, are each hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.8 -aminoalkyl, cyano-C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.20 -cycloalkyl, C.sub.7 -C.sub.20 -aralkyl or C.sub.6 -C.sub.14 -aryl, with the proviso that each aryl group has a carbocyclic structure, which process comprises:
- reacting an amine of the formula ##STR8## with an acrylonitrile of the formula ##STR9## wherein the substituents have the above-mentioned meanings, in a molar ratio of from 0.9:1 to 100:1 at a temperature of from 40.degree. to 200.degree. C. and a pressure of from 1 to 350 bar over a heterogeneous catalyst selected from the group consisting of oxides of the second, third or fourth main groups or of the third to sixth subgroups of the Periodic Table of Elements, acidic zeolites and mixtures thereof.
Dependencies are inferred from the claim text.