A process for the preparation of a herbicidal and / or fungicidal composition comprising a substituted pyrazole-5-one derivative, and of a novel substituted pyrazole-5-one derivative

摘要

Substituted pyrazolin-5-one derivatives, which are known in some cases, of the formula (I) …IMAGE… in which… R1, R2 and Ar have the meanings given in the description, and the additionally novel substances are used as herbicides and fungicides. …??The compounds of the formula (I), which are known in some cases, can be prepared by known processes, for example by reacting suitable 4-(N,N-dimethylaminomethylene)pyrazolin-5-one derivatives with ammonia or with suitable hydroxylamines or with suitable amines. Suitable 4-formylpyrazolin-5-one derivatives can also be reacted with suitable amines.