The present invention deals with 2-(substituted- imino)-3-alkyl-tetrahydro-6H-1,3,4-thiadiazin-5-ones, salts thereof, their preparation and their use for preparing corresponding 5-dialkoxy-phosphino-thioloxy compounds, which are valuable insecticides.
The thiadiazinone compounds of the invention have the
wherein R' is alkyl and R2 is alkyl, cycloalkyl, alkenyl or aryl. They are prepared by reacting a thiosemicarbizide with an alkyl alpha-halothioacetate or with a haloacetic anhydride.
These thiadiazin-5-ones are useful for preparing, by the addition of a dialkylhalothiophosphate, 2-(substituted- imino)-3-alkyl-5-dialkoxyphosphinothioloxy-6H-1,3,4-thiadiazines which are valuable insecticides.
本发明涉及 2-(取代-亚
氨基)-3-烷基-四氢-6H-1,3,4-噻二嗪-5-酮、其盐、其制备方法及其用于制备相应的 5-二烷氧基-膦-
硫醇氧化合物,这些化合物是有价值的
杀虫剂。
本发明的噻二嗪酮化合物具有以下特征
其中 R' 是烷基,R2 是烷基、环烷基、烯基或芳基。它们是通过
硫代
氨基甲酰
肼与烷基α-
硫代乙酸酯或卤代
乙酸酐反应制备的。
这些噻二嗪-5-酮可以通过添加二烷基
硫代磷酸酯来制备 2-(取代-亚
氨基)-3-烷基-5-二烷氧基
硫代
磷酰氧基-6H-1,3,4-噻二嗪,它们是很有价值的
杀虫剂。