HERBICIDES CONTAINING AS ACTIVE SUBSTANCE DERIVATIVES OF 1-CARBAMOIL-2-PINASOLINE AND PROCESS FOR PRODUCTION OF THE ACTIVE SUBSTANCES

The invention relates to a herbicidally active compound of the general wherein R1, R2, R3 and R4 are equal or different and repre;sent hydrogen atoms, alkyl groups having 1-6 carbon atoms, cycloalkyl groups having 3-6 carbon atoms or alkoxycarbonyl groups having 2-5 carbon atoms; R5 is a hydrogen atom, an alkyl group or haloalkyl group having 1-8 carbon atoms, a substituted or non-substituted phenyl group, a substituted or non-substituted heterocyclic group, or an alkenyl, alkynyl or alkoxycarbonyl group having 2-5 carbon atoms; and wherein two of the groups R1, R2, R3, R4 and R5 together may form a straight or branched alkylene group having 3-5 carbon atoms; Ar is a phenyl group, a phenyl(C1-C4)alkyl group or a heteroaryl group; R6 is a hydrogen atom or substituent to Ar, which substituent, in case Ar is a phenyl or phenylalkyl group, is attached to the phenyl group in the ortho position with respect to the sulphonyl or sulphonylalkyl group, and which substituent is selected from the following atoms and groups: a halogen atom; a nitro group; an alkoxycarbonyl group that has 2-8 carbon atoms and is unsubstituted or substituted with one or more hydroxy or C1-C4 alkoxy groups; and an alkyl, hydroxyalkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio, alkylsulphonyl and haloalkylsulphonyl group having 1-6 carbon atoms; and R7 represent a hydrogen atom or one or two halogen atoms or C1-C4 alkyl groups.