Cyclohexenone compounds, their preparation and their use for controlling undesirable plant growth

Abstract From the Canadian patent

Cyclohexenone compounds of the formula I where the substituents have the following meanings: R1 is C3-C4-alkenyl, C3-C4-alkynyl, C2-C4-haloalkyl C2-C4-halo-, alkenyl, C2-C4-alkoxyalkyl or a radical CH2-R3 where, R3 is a 5-ring heterocycle with one to three nitrogen atoms and/or one to two oxygen atoms and/or one sulfur atom as hetero-atoms, which may bear up to two double bonds and one or two of the following substituents: C1-C4-alkyl C1-C4-alkoxy, C1-C4-alkylthio, halogen trifluoromethyl, C1-C4-alkoxymethyl, C1-C4-alkylthiomethyl and/or vinyl or, phenyl which may bear one to three of the following groups: C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio halogen, trifluoromethyl, nitro and/or …