substituted pyrazolin - 5 regions, their manufacture and use tilbekaempelse of harmful organisms

摘要

Fungicidally active substituted pyrazolin-5-ones of the formula IMAGE in which R1 is hydrogen or alkyl, R2 is hydrogen, alkyl, alkenyl, alkinyl, cyanoalkyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonylalkyl or alkoxycarbonylalkyl, aminocarbonylalkyl, alkylaminocarbonylalkyl or dialkylaminocarbonylalkyl, or in each case optionally substituted oxiranylmethyl, aralkyl or aryl, and R3 is alkyl, alkenyl, alkinyl, cyanoalkyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonylalkyl, alkoxycarbonylalkyl, cycloalkyl or cycloalkylalkyl, or in each case optionally substituted aralkyl, aryloxyalkyl or arylthioalkyl, but wherein R3 is methyl or ethyl only if R1 and/or R2 is not hydrogen or methyl.