BENZOYLCYCLOHEXENONES, METHODS OF PREPARING THEM AND THEIR USE AS HERBICIDES AND PLANT-GROWTH REGULATORS

摘要

The invention concerns compounds of formula (I) in which n is 0 to 6; X represents halogen, CN, OCN, SCN, C2-C4 alkinyl or CHR<5>R<6>, R<5> and R<6>, independently of each other, being CN, NO2, formyl, optionally halo-substituted (C1-C4 alkyl)carbonyl, optionally halo-substituted (C1-C4 alkoxy)carbonyl or optionally substituted phenylcarbonyl; R<1> is optionally halo-substituted C1-C4 alkyl, optionally halo-substituted C3-C6 cycloalkyl or optionally substituted phenyl; R<2> represents halogen, CN, NO2, C1-C3 alkyl, C1-C3 alkoxy, C1-C3 haloalkyl, C1-C3 haloalkoxy or R<7>SOm-, R<7> being C1-C3 alkyl and m being 0, 1 or 2; R<3> represents H, halogen, OH, C1-C3 alkyl, C1-C3 alkoxy, C1-C3 haloalkyl, C1-C3 haloalkoxy or (C1-C3 alkoxy)carbonyl and R<4> represents H, CN, NO2, halogen, C1-C3 haloalkyl, C1-C3 haloalkoxy or R<8>S(O)p-, R<8> being C1-C3 alkyl and p being 0, 1 or 2. Such compounds are suitable for use as selective herbicides or plant-growth regulators. With the exception of compounds of formula (I) in which X = Cl, the compounds are also per se novel. They can be prepared from 2-benzoyl-1,3-cyclohexanediones by various methods.