1973年南开大学元素有机化学研究所合成一种新型杀虫剂——螟铃畏(又称为杀虫硫脲、杀螟硫脲、螟铃硫脲、C-9140)。 螟铃畏是一种取代硫脲类型的化合物,化学名称为N’-(4-氯邻甲苯基)-N,N-二甲基硫脲。合成所需的原料为邻甲苯胺、二硫化碳、二甲胺、氯气、盐酸等,这些原料国内都有生产。工业生产的流程较短,收率较高,成本可能低于杀虫脒。螟铃畏的结构式为 1973 Nankai University Institute of Elemental Organic Chemistry synthesis of a new type of insecticide - borer (also known as insecticidal thiourea, fenitrothion, borer thiourea, C-9140). Insect aspartame is a thiourea-substituted compound with the chemical name N ’- (4-chloro-tolyl) -N, N-dimethylthiourea. The raw materials required for the synthesis of o-toluidine, carbon disulfide, dimethylamine, chlorine, hydrochloric acid, etc., these raw materials have domestic production. Industrial production process is shorter, higher yield, the cost may be lower than chlordimeform. The structural formula of stem borer is