Mandelic acid derivatives and mandelonitriles, processes for producing them, and their use for combating microorganisms

摘要

There are described microbicidally effective mandelic acid derivatives and mandelonitriles of the formula I <IMAGE> (I) wherein X is -CH= or -N=; Ar is phenyl, diphenyl or naphthyl group, which can be substituted in the form of the substituents R1-R3 by nitro, halogen, alkyl, alkoxy or haloalkyl; R is any one of the groups -COOR5, -COSR6, -CON(R7)(R8) or CN; n is 0, 1 or 2; and R4 to R8 are aliphatic and aromatic and in part also heterocyclic substituents which are described in the text in greater detail; with the inclusion of the salts and metal complexes thereof. Also methods for producing these products are disclosed, and also pesticidal compositions containing as active ingredient one of these compounds. There is described too a method for combating phytopathogenic microorganisms with the aid of these substances.