| 摘要 |
The title compounds of the formula <IMAGE> (I) can be prepared by reacting methylene-glutaconic acid dinitriles of the formula R1-CH=C(CN)-CH'CH-CN (II) with hydrogen halide of the formula HX (III) In these formulae, X denotes fluorine, chlorine, bromine or iodine and R1 denotes -OR2 or -N(R2, R3), in which R2 and R3, independently of one another, represent straight-chain or branched C1-C8-alkyl, C3-C8-alkenyl, C2-C8-alkoxyalkyl, C4-C8-alkoxyalkenyl, C3-C8-cycloalkyl, C6-C12-aryl, C7-C10-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, where R2 and R3, with the N atom on which they are substituents, may also form a 5- to 8-membered ring which may contain a further heteroatom from the group comprising N, O and S.
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