Selective herbicidal N-substd. chloro-acetanilide derivs. - prepd. by chloro:acetylation of N-2- and/or 4-substd. alkyl-aniline derivs.

摘要

N-substd. Chloro-acetanilide derivs. are cpds. of formula (I) (where R1 is 1-4C alkyl, 1-3C alkoxy or halogen; R2 is H, 1-3C alkyl or halogen; R3 is H or 1-4C alkyl; R4 is H, OH, 1-4C alkoxy, halogen, 1-4C alkylcarbonyloxy or halo-(1-4C alkylcarbonyloxy); R5 is halogen, OH, 1-4C alkoxy, 1-4C alkylcarbonyloxy, halo-(1-4C alkylcarbonyloxy) or CN, or (when R4 is OH, halogen, 1-4C alkylcarbonyloxy or halo(1-4C alkylcarbonyloxy)) also H; and R6 is H or Me), are new. (I) are herbicides with good activity against a broad spectrum of economically important grassy weeds such as Lolium, Poa, Setaria and Echinochloa and good activity against dicotyledonous weeds. (I) are well tolerated by many dicotyledonous crop plants such as soya, cotton, sugar beet, rape and groundnuts, as well as by monocotyledonous crops such as maize and some cereals.