The composition of alkyl halofenil herbicide, biuret, process for the preparation of a compound.Process for combating unwanted plant growth and use as herbicide of a biuret of alkyl halofenil

摘要

A herbicidal composition has as active ingredient, a halophenyl alkyl biuret of general formula I:- CHEM wherein Hal represents a chlorine or, especially, a fluorine atom; R1 represents a hydrogen atom, a C1-6 alkoxy group, a C1-6 alkyl group; R2 represents a C1-6 alkyl group or a hydrogen atom; R3 represents a C1-6 alkyl group; or R1 and R3 together represent a C2-4 alkylene group and X represents a hydrogen or halogen atom; a C7-14 aralkyl group or C1-10 alkyl group, each of which may optionally be substituted by one or more halogen atoms, or by a C1-6 alkoxy, C1-6 alkoxyimino, C6-10 arylthio, C1-6 alkylthio, C7-14 aralkyloxy, C2-7 alkanoyloxy or C3-6 acetal group; or a C6-10 aryl, C1-6 alkoxy, C7-14 aralkyloxy, C2-6 alkenyl, (C1-6 alkyl)carbamoyl, C2-7 alkanoyl, or C7-11 aroyl group, or a C3-8 cycloalkyl group optionally substituted by one or more halogen atoms.