Novel insecticidally active heterocyclic compounds of the formula ##STR1## wherein W represents a substituted pyridyl group, or a 5- or 6-membered optionally substituted heterocyclic group containing at least two hetero atoms selected from oxygen, sulfur and nitrogen atoms, R represents a hydrogen atom or an alkyl group, Y represents .dbd.N-- or ##STR2## R' represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group or a cyano group, Z represents a nitro group or a cyano group, and T represents 3 or 4 optionally substituted ring members of a 5- or 6-membered unsaturated heterocyclic ring which it forms together with the adjoining carbon atom and nitrogen atom, said 5- or 6-membered unsaturated heterocyclic ring containing 1 to 3 hetero atoms which are selected from oxygen, sulfur and nitrogen atoms and at least one of which is a nitrogen atom.
式子为##STR1##的新型杀虫活性
杂环化合物,其中W代表取代的
吡啶基团,或含有至少两个氧、
硫和氮原子的5-或6元取代的杂环基团,R代表氢原子或烷基,Y代表.dbd.N--或##STR2##,R'代表氢原子、烷基、芳基、酰基、烷氧羰基或
氰基,Z代表硝基或
氰基,T代表5-或6元不饱和杂环环的3或4个可选取代环成员,与相邻碳原子和氮原子一起形成,所述5-或6元不饱和杂环环含有1-3个氧、
硫和氮原子,其中至少一个是氮原子。