| 摘要 |
NEW MATERIAL:A compound expressed by formula I (X is halogen or CH3; Y is H or halogen; R1 is Y, lower alkyl, halogeno lower alkoxy, substituted pyridyloxy, etc. R2 is Y, lower alkyl, lower alkynyl, phenylazo, etc.; R3 is Y, lower alkyl or halogeno lower alkyl except when R3 is H, R1 is H or halogen and R2 is halogen or haloalkoxyl). EXAMPLE:2-( 4-tert-Butoxycarbonylphenyl )-5-( 2,6-difluorophenyl )-DELTA<4>-1,2,4-thiadialine-3-one. USE:An insecticide and agricultural and horticultural germidice, having improved insecticidal and germicidal efficacy against various blights and injurious insects with low toxicity to warm-blooded animals and not only larvicidal but also ovicidal action. PREPARATION:A novel compound expressed by formula I is cyclized with an oxidizing agent in an organic solvent in the presence of an acid binder to afford the aimed compound expressed by formula I. |
