This invention provides novel insecticidally and acaricidally active pyrimidine derivatives of formula (I): ##STR1## and stereoisomers thereof, wherein R.sup.1 is selected from alkyl; alkenyl; alkynyl; haloalkyl; haloalkenyl; and cycloalkyl optionally substituted by alkyl or halogen; R.sup.2 is selected from alkyl; haloalkyl; alkoxy; alkylamino; dialkylamino; halogen; cycloalkyl optionally substituted by halogen or alkyl; and phenyl optionally substituted by alkyl, haloalkyl, halogen or alkoxy; R.sup.3 is selected from hydrogen and halogen; R.sup.4 is the residue of an alcohol of formula R.sup.4 --OH which forms an insecticidal ester when combined with chrysanthemic acid, permethrin acid or cyhalothrin acid; and X is selected from oxygen and sulphur.
这项发明提供了公式(I)的新型杀虫和杀螨活性
嘧啶衍
生物:##
STR1##及其立体异构体,其中R.sup.1选自烷基;
烯基;炔基;卤代烷基;卤代
烯基;和
环烷基,可选择地被烷基或卤素取代;R.sup.2选自烷基;卤代烷基;烷
氧基;烷基
氨基;二烷基
氨基;卤素;
环烷基,可选择地被卤素或烷基取代;和
苯基,可选择地被烷基,卤代烷基,卤素或烷
氧基取代;R.sup.3选自
氢和卤素;R.sup.4是公式R.sup.4 --OH的醇残基,当与
菊酯酸,
氯氰菊酯酸或
氰戊菊酯酸结合时形成杀虫
酯;X选自
氧和
硫。