Method for producing substituted 2-nitroguanidine derivative

The invention relates to a method for producing compounds of formula (I), wherein R1 is hydrogen or C1-C4 alkyl, R2 is hydrogen, C1-C6alkyl, C3-C6 cycloalkyl or a radical -CH2B, A is an unsubstituted or substituted, aromatic or non-aromatic, monocyclic or bicyclic heterocyclic radical and B is phenyl, 3-pyridyl or thiazolyl, these being substituted. The inventive method is characterised in that a compound of formula (II) wherein R1, R2 and A have the same meanings as in formula (I) and R3 is unsubstituted or substituted C11-C22 alkyl, C7-C16 cycloalkyl, C3-C20 alkenyl, C3-C20 alkinyl, N(R4)R5, optionally substituted aryl with the exception of unsubstituted and substituted phenyl, or an optionally substituted heterocyclic radical, R4 is hydrogen or C1-C12 alkyl and R5 is hydrogen, C1-C12 alkyl, C1-C12 alkyl carbonyl or C1-C12 alkoxy carbonyl is hydrolysed. The invention also relates to a method for producing compounds of formulae (II) and (III), and to a method for combating pests using compounds of formula (II). The compounds of formula (I) are suitable for producing pesticide mixtures.