4-BENZOYL ISOXAZOLE DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND THEIR USE AS HERBICIDES

摘要

4-Benzoyl isoxazole derivatives of the general formula (I): wherein R represents a hydrogen atom or a group -CO2R5; R1 represents cyclopropyl; R2 represents -S(O)nR51; R3 represents a chlorine, bromine or fluorine atom, a straight- or branched- chain alkyl or alkoxy group with up to four carbon atoms optionally substituted by one or more halogen atoms; R4 represents a chlorine, bromine or fluorine atom, an alkyl group with one or four carbon atoms optionally substituted by one or more halogen atoms; R5 represents a straight- or branched- chain alkyl group containing up to six carbon atoms optionally substituted by one or more halogen atoms; R51 represents methyl or ethyl; n represents zero, one or two. Also disclosed is a process for their preparation, herbicidal composition containing the said derivatives and a method for controlling the growth of weeds.