New N-aryl-maleimide derivs. - useful for selective pre-emergence control of mono: and di:cotyleconous weeds in cotton crops

摘要

N-Arylmaleimide derivs. of formula (I) are new: T = 1-4C alkyl or phenyl; U = 1-4C alkoxy, 2-4C alkenyloxy or 3-6C alkynyloxy, all opt. substd. by halogen; V = H, F or Cl; W = H or halogen; X = H, halogen, trihalomethyl, OR1, SR1 or COOR2; or W+X = O-CH2-CO-NR3, S-CO-NR3 or O-CO-NR3; R1 = (a) H, (b) 1-6C alkyl, 2-6C alkenyl, 3-6C alkynyl, 3-6C cycloalkyl, (3-6)cycloalkyl(1-3C)alkyl, carboxy(1-6C)alkyl, (2-7C)alkoxycarbonyl(1-6C)alkyl, (3-7C)alkenyloxycarbonyl(1-6C) alkyl, (4-7C)alkynyloxycarbonyl(1-6C)alkyl, (4-7C)cycloalkoxycarbonyl(1-6C)alkyl or 1-4C alkylsulphonyl, all opt. substd. by halogen, (c) phenyl or phenylsulphonyl, opt. substd. by halogen, 1-4C alkyl, 1-4C haloalkyl, NO2, 1-4C alkoxy or 1-4C haloalkoxy, or (d) 1-4C alkyl substd. by a satd. or unsatd. heterocyclc gp.; R2 and R3 = H, or 1-6C alkyl, 2-6C alkenyl, 3-6C alkynyl, 3-6C cycloalkyl or (3-6C)cycloalkyl(1-3C)alkyl, all opt. substd. by halogen; Y = H, F, Cl or NR4R5; R4 and R5 = H, 1-6C alkyl, 2-6C alkenyl or 3-6C alkynyl; Z1 and Z2 = O or S. USE - (I) are herbicides, e.g. useful for selective pre-emergence control of mono- and dicotyledonous weeds in cotton crops.