Insecticidal compounds of the formula: ##STR1## in which A is chloro and B is hydrogen or A and B are both fluoro, X is oxygen or sulfur and one of R.sup.1 and R.sup.2 is or includes an optionally substituted 5-membered heteroaryl ring, their method for preparation and formulation, insecticidal compositions thereof, and their use to control insects, are disclosed and exemplified.
公式为:##STR1## 其中A是
氯,B是氢或A和B都是
氟,X是氧或
硫,R.sup.1和R.sup.2中的一个或包括一个可选择取代的5元杂环芳基环,公开并举例说明了它们的制备和配方,其杀虫组合物以及它们用于控制昆虫的用途。