| abstract |
Compounds of formula I. wherein n 0-6, R 1 alkyl, haloalkyl, cycloalkyl, halocycloalkyl, phenyl or halogenated phenyl, R² Hal, CN, alkyl, haloalkyl, alkoxy, haloalkoxy, thioalkyl, R a SO₂-, R a SO₂O-, R a SO₂NR⁶, where R a , R⁶ are alkyl or haloalkyl, and R³ H, Hal, alkyl, haloalkyl, alkoxy , Haloalkoxy or alkylthio and R⁴ haloalkyl are suitable as selective herbicides and as growth regulators. For the preparation, a cyclohexanedione can be reacted a) with a 4-oxy-substituted benzoyl chloride and rearranged the enol ether obtained or b) with a benzoyl cyanide. The benzoyl chloride or cyanide required is accessible via the carboxylic acid from appropriately substituted toluenes. |