| 摘要 |
Pyridyloxaryl benzoyl ureas and a process for their preparation are provided. The ureas are useful as the active toxicant in insecticidal compositions and have the general formula: <CHEM> wherein: Y represent oxygen or sulfur, Z represents oxygen, sulfur, sulfinyl or sulfonyl; R1, R2 are independently hydrogen, halogen, methyl, trifluoromeonyl, or lower alkyl; R3, R4, R5 are independently hydrogen, halogen, trifluoromethyl or methyl; R6 represents hydrogen, halogen, lower alkyl, cyano, or nitro; R7 represents hydrogen, halogen, or lower alkyl; R8 represents lower alkyl, cyano nitro, hydrogen or halogen; R9 is hydrogen, haligen, or lower alkyl, provided that when R7 and R9 are hydrogen and R6 is hydrogen, halogen or nitro, R8 may not be hydrogen, halogen or nitro. |
