Process for the preparation of a mixture of aminomethylenated glutaconic acid dinitriles

摘要

Aminomethylenated glutaconic acid dinitriles of the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, straight-chain or branched C.sub.1 -C.sub.8 -alkyl, C. sub.3 -C. sub.8 -alkenyl, C.sub.2 -C.sub.8 -alkoxyalkyl, C.sub.4 -C.sub.8 - alkoxyalkenyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.6 -C.sub.12 -aryl, C. sub.7 -C.sub.10 -aralkyl or a 5- to 8-membered, saturated or unsaturated heterocyclic ring containing 1 or 2 heteroatoms from the group comprising N, O and S,PPare obtained by reacting 3-amino- acrylonitriles of the formula ##STR2## in which the radicals R.sup.1 and R.sup.2 have the meaning mentioned, with one another at from 0° to 100° C. in the presence of at least 0.5 equivalents of an acidic compound.