ACARICIDAL COMPOSITION COMPRISING 2,3-DIAMINO-MALEIC ACID-NITRYL-AZOMETHINE DERIVATIVES AND PROCESS FOR PRODUCING SUCH COMPOUNDS

摘要

There are provided novel azomethines of 2,3-diaminomaleonitrile of the formula …… in which… X represents halogen, haloalkyl or CN,… R<1>, R<2>, R<3> and R<4> can be identical or different and represent hydrogen, optionally substituted alkyl, optionally substituted alkoxy, halogen, CN, NO2, optionally substituted dialkylamino, alkoxycarbonyl, optionally substituted alkylthio, optionally substituted alkylthio, optionally substituted alkylthionyl, optionally substituted alkylsulphonyl, OH, SH or NH2. …The novel compounds have a highly pronounced acaricidal activity.