申请人:The Dow Chemical Company
公开号:US04931452A1
公开(公告)日:1990-06-05
Substituted N-cyanomethyl-2-pyridinones were prepared by the reaction of alkali metal substituted-2-pyridinates with monohaloacetonitriles and found to possess insecticidal properties. The alkali metal substituted-2-pyridinates can be preformed or prepared from the corresponding 2-halopyridines or 2-pyridinols in the reaction medium. N-cyanomethyl-3-fluoro-5-(trifluoromethyl)-2-pyridinone, for example, was prepared from 2,3-difluoro-5-(trifluoromethyl)pyridine and found to control aster leafhoppers both on contact and systemically.
N-氰甲基-2-吡啶酮通过碱金属取代的2-吡啶酸盐与单卤代乙腈反应制备,并发现具有杀虫性能。碱金属取代的2-吡啶酸盐可以事先形成,或者从相应的2-卤代吡啶或2-吡啶醇在反应介质中制备。例如,N-氰甲基-3-氟-5-(三氟甲基)-2-吡啶酮是由2,3-二氟-5-(三氟甲基)吡啶制备的,并发现在接触和系统性上都可以控制星花叶蝉。