| abstract |
The invention relates to new trisubstituted cyanguanidines, several processes for their preparation and their use as fungicides.n n n The compounds of the general formula in which R 1 , R 2 and R 3 have the meaning given in the description are obtained if, for example, thioureas are reacted with a heavy metal salt of cyanamide in the presence of a diluent and, if appropriate, in the presence of a phase transfer catalyst; there are also other process variants.n n n The active ingredients are suitable for use as crop protection agents and can be used with particularly good results to combat Oomycetes. |