The present invention provides a nitrogen-containing cyclic compound represented by the formula (1): ##STR1## wherein R.sup.1 represents an alkyl group; R represents a hydrogen atom or an alkyl group; X represents an oxygen or sulfur atom or NR.sup.3 ; Q.sup.1 represents a hydrogen atom, or an alkyl, cycloalkyl, alkenyl or alkynyl group or a phenyl, naphthyl or heterocyclic group etc.; Q.sup.2 represents an alkyl, cycloalkyl or alkenyl group, or a phenyl or thienyl group etc.; A.sup.1 represents a carbon or nitrogen atom; A.sup.2 represents CR.sup.2 or NR.sup.2, or an oxygen or sulfur atom, or SO or SO.sub.2 ; A.sup.3 represents a single bond, or an oxygen or sulfur atom, or CR.sup.5 or NR.sup.5) and a herbicide comprising the same, which herbicide exhibits very high herbicidal activity at very low application rate and has selectivity against crops.
本发明提供一种氮含有环化合物,其由公式(1)表示:##STR1## 其中,R.sup.1代表烷基;R代表氢原子或烷基;X代表氧原子、
硫原子或NR.sup.3;Q.sup.1代表氢原子或烷基、环烷基、烯基或炔基或苯基、
萘基或杂环基等;Q.sup.2代表烷基、环烷基或烯基或苯基或
噻吩基等;A.sup.1代表碳或氮原子;A.sup.2代表CR.sup.2或NR.sup.2,或氧原子或
硫原子,或SO或SO.sub.2;A.sup.3代表单键,或氧原子或
硫原子,或CR.sup.5或NR.sup.5)。本发明还提供了一种包含该化合物的
除草剂,该
除草剂在非常低的施用量下表现出非常高的除草活性,并对作物具有选择性。