| 摘要 |
NEW MATERIAL:A compound shown by the formula I (X is methyl, or trifluoromethyl; Y1 is H, halogen, or haloalkyl; Y2 is halogen, haloalkyl, or haloalkoxy). EXAMPLE:2-( 4-Trifluoromethoxyphenyl )-5-(2-trifluoromethylphenyl)-DELTA<4>-1,2,4-thiadiazolin-3-one. USE:An insecticide and agricultural and horticultural fungicide. Having low toxicity to warm-blooded animals. PREPARATION:A compound shown by the formula II is subjected to ring closure by the use of an oxidizing agent (e.g., Br, Cl, sodium hypochlorite, etc.) in an organic solvent (e.g., dichloromethane, chloroform, DMF, ethyl acetate, etc.) in the presence of an acid binder (e.g., triethylamine, caustic soda, etc.) to give a compound shown by the formula I.
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