fenoxyfenoxypropionzuurderivaten, method for preparation thereof, which contain herbicidepreparaten direvaten and method for control of weeds listed under application of derivatives

摘要

R-isomers of compounds of the general formula IMAGE in which n and n' independently represents 0 or an integer of 1 to 3; each R independently represents a halogen atom, a methoxy group or an alkyl group having 1 to 4 carbon atoms; each R1 independently represents a halogen atom or a methyl group; and R2 represents a group of the general formula OR3, SR4, NHR5 or NR6R7, in which R3 represents one equivalent of a salt- forming cation, a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, a trichloroethyl group, an alkenyl group having from 2 to 4 carbon atoms, a cyclohexyl group optionally substituted by one or more methyl groups, a cyclopentyl group, a phenyl group optionally substituted by one or two halogen atoms, or a benzyl group; R4 represents an alkyl group having from 1 to 6 carbon atoms, a phenyl group optionally substituted by one or two halogen atoms, or a benzyl group; R5 represents a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a phenyl group optionally substituted by one or more substituents selected from halogen atoms and -CF3, -OCF2CF2H and -CO2CH3 groups, or a benzyl group; R6 represents an alkyl or alkoxy group having from 1 to 4 carbon atoms; have useful selective herbicidal properties, especially against grass-like weeds in barley.