Heterocyclic compounds, method for preparing the same and herbicidal compositions containing the compounds as effective components.

摘要

A herbicide exhibiting high herbicidal activity against a variety of weeds and being highly safe for useful crops can be obtained through the use of a heterocyclic compound represented by the following general formula (I): <CHEM> wherein R represents a group represented by the following formula: <CHEM> X represents an oxygen atom or a sulfur atom; R<1> represents a halogen atom or a lower alkyl group; R<2> represents a hydrogen atom or a methyl group; R<3> represents a halogen atom, a lower alkyl group, a lower haloalkyl group, a lower alkoxy group, a lower alkylthio group, a cyano group or -COOR<4> (R<4> is a lower alkyl group, a lower alkoxyalkyl group or a tetrahydrofurfuryl group); m is 0, 1 or 2 and n is 0, 1, 2 or 3.