苯炔[3+2]环加成反应构建三氟甲基取代的苯并环状亚砜亚胺衍生物及其杀棉蚜活性研究  

Constrution and Insecticidal Activities of Trifluoromethylated Benzocyclicsulfoximine Derivatives by [3+2]Cycloaddition Reaction of Beznyne

作　　者：李文娟[1] 张睿 蔡志华 韩小强[2] 何林[1] 代斌[1] Wenjuan Li;Rui Zhang;Zhihua Cai;Xiaoqiang Han;Lin He;Bin Dai(Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan,School of Chemistry and Chemical Engineering,Shihezi University,Shihezi,Xinjiang 832003;Key Laboratory for Oasis Agricultural Pest Management and Plant Protection Resources Utilization,Xinjiang Uygur Autonomous Region,College of Agriculture,Shihezi University,Shihezi,Xinjiang 832003)

机构地区：[1]石河子大学化学化工学院新疆兵团化工绿色过程重点实验室,新疆石河子832003 [2]石河子大学农学院新疆绿洲农业病虫害治理与植物资源利用重点实验室,新疆石河子832003

出　　处：《有机化学》2022年第9期2832-2839,共8页Chinese Journal of Organic Chemistry

基　　金：石河子大学双一流(No.SHYL-YB201901);石河子大学高层次人才启动(No.RCZK2021B08)资助项目。

摘　　要：亚砜亚胺由于其抗疟、抗菌及除草等特性在农药和医药领域有广泛的应用.以苯炔与三氟甲基取代的α,β-不饱和叔丁基亚磺酰胺通过[3+2]环加成反应构建了三氟甲基芳基取代的苯并环状亚砜亚胺骨架.反应以氟化钾为氟试剂,18-冠-6为添加剂,乙腈/甲苯(V∶V=4∶1)为溶剂,室温反应20h,条件温和,收率低到中等(13%~57%).采用浸渍法测定该类化合物对棉蚜的杀虫活性,结果表明,(1R,3S)-1-(叔丁基)-3-((E)-4-甲基苯乙烯基)-3-(三氟甲基)苯并[d]异噻唑1-氧化物(3b)和(1R,3S)-1-(叔丁基)-3-(三氟甲基)-3-((E)-4-(三氟甲基)苯乙烯基)苯并[d]异噻唑1-氧化物(3h)的24hLC50低于阳性对照吡虫啉(LC50 0.0800 mg/L)和啶虫脒(LC50 0.0532 mg/L),可作为杀虫药物的先导化合物进行结构修饰研究.Sulfoximines derivatives are widely used in the field of pesticides and medicine due to its antimalarial, antibacterial and herbicidal properties. A concise and direct synthetic strategy for the construction of trifluoromethylated cyclicsulfoximines has been developed via [3 + 2] cycloaddition reaction of benzynes and trifluoromethyl α,β-unsaturated N-(S)-tert-butyl sulfinylketoimines. The reaction affords the cyclosulfoximines at room temperature in low to moderate yields(13%~57%) and KF as fluorinated reagent, 18-C-6 as additives, and acetonitrile and toluene as mixed solvent(V∶V=4∶1).The insecticidal activities against Aphis gossypii were determined by impregnation method. The results showed that 24-h median lethal concentrations(24 h LC50) of(1R,3S)-1-(tert-butyl)-3-((E)-4-methylstyryl)-3-(trifluoromethyl)-3H-1λ4-benzo-[d]isothiazole 1-oxide)(3b) and(1R,3S)-1-(tert-butyl)-3-(trifluoromethyl)-3-((E)-4-(trifluoromethyl)styryl)-3H-1λ4-benzo[d]-isothiazole 1-oxide(3h) are lower than that of the positive control imidacolprid(0.0800 mg/L) and dinitraz(0.0532 mg/L).They can be used as new lead insecticidal compounds with further structure modification.

关 键 词：苯炔 3+2环加成 苯并环状亚砜亚胺 杀虫活性 

分 类 号：TQ453[化学工程—农药化工]