| 摘要 |
<p>The invention provides novel insecticidal ethers of formula (I) : <CHEM> wherein R<4> represents a group selected from those groups represented by R<5> in insecticidally active compounds of formula : <CHEM> R<3> is selected from fluoromethyl and difluoromethyl, and either (a) R<1> and R<2> represent alkyl of one, two, three or four carbon atoms, or (b) R<1> and R<2> taken together with the adjacent carbon atom form a cycloalkyl ring of four, five or six carbon atoms, and processes for their preparation. The invention also provides insecticidal compositions comprising the compounds of formula (I) and methods for combating insect pests therewith</p> |
