Insecticidal phosphoramidothioates. Compounds of formula (I)
wherein R1 is an alkyl group having from 1 to 12 carbon atoms and R2 is an alkyl group having from 2 to 8 carbon atoms are prepared by reacting methamidophos with appropriately substituted N-chlorosulfenyl carbamates, preferably in the presence of an HCI acceptor. Compounds of formula (I), especially those having R2 as an lsopropyl or a tert-butyl group are useful as insecticides which have high insecticidal activity but low mammalian toxicity for greater mammalian safety. in addition, once sprayed on crops. the compounds of formula (I) are not readily removed therefrom by rain and moisture.
杀虫
硫代磷酸酯。式(I)化合物
其中 R1 是具有 1 至 12 个碳原子的烷基,R2 是具有 2 至 8 个碳原子的烷基,通过
甲胺磷与适当取代的 N-
氯磺酰
氨基甲酸酯反应制备,最好在有 HCI 受体的情况下进行。式 (I) 化合物,特别是 R2 为异丙基或叔丁基的化合物,可用作
杀虫剂,其杀虫活性高,但哺乳动物毒性低,对哺乳动物更安全。此外,一旦喷洒在作物上,雨
水和湿气不易将式 (I) 化合物从作物上清除。