Synthesis and Biological Activity of<i>O,O</i>-Dialkyl<i>S</i>-(5-Aryl-l,3,4-oxadiazol-2(3<i>H</i>)-on-3-yl)methyl Phosphorothioates and Phosphorodithioates
作者:Hiroshi Kamizono、Morifusa Eto
DOI:10.1080/00021369.1983.10865735
日期:1983.4
Some phosphorus derivatives of oxadiazoles were synthesized to seek insecticidal lead compounds. The l,3,4-oxadiazol-2-ones were converted via the N-methylol derivatives to the corresponding N-chloromethyl derivatives. From these derivatives a variety of O,O-dimethyl phosphorodithioates 4, O,O-dimethyl phosphorothioates 5 and O,O-di-i-propyl phosphorothioates 6 were prepared.These phosphorus derivatives were examined for insecticidal activity towards houseflies and for anti-acetylcholinesterase (anti-AChE) activity using the housefly heads as an enzyme source. Most of the compounds 4 and 5 showed contact toxicity as high as the analogous methidathion insecticides, which appeared to correlate with the strong anti-AChE activity. On the other hand, all the compounds 6 showed a high activity in AChE inhibition but only a poor insecticidal activity.
合成了一些恶二唑磷衍生物,寻找杀虫先导化合物。 1,3,4-恶二唑-2-酮通过N-羟甲基衍生物转化为相应的N-氯甲基衍生物。由这些衍生物制备了多种O,O-二甲基二硫代磷酸酯4、O,O-二甲基硫代磷酸酯5和O,O-二异丙基硫代磷酸酯6。检查了这些磷衍生物对家蝇的杀虫活性和抗昆虫活性。使用家蝇头作为酶源来检测乙酰胆碱酯酶(抗 AChE)活性。大多数化合物 4 和 5 的接触毒性与类似的甲硫磷杀虫剂一样高,这似乎与强抗乙酰胆碱酯酶活性相关。另一方面,所有化合物6都表现出较高的AChE抑制活性,但杀虫活性较差。