| 摘要 |
<p>Hydroxamic acid esters of the formula <IMAGE> in which R1 is an optionally substituted alkyl, cycloalkyl, aryl or aralkyl radical and R2 is an alkyl, alkenyl or alkinyl radical, or R1 and R2 together are an alkylene bridge with 2 to 4 carbon atoms, one of the radicals R3 and R4 is <IMAGE> while the other is an alkyl, alkenyl, alkinyl, halogenoalkenyl or alkoxyalkyl radical, and X is O or S, which possess pesticidal properties. Intermediates therefor wherein one of N-OR3 and N-OR4 is N-OH or a carbonyl group are also new.</p> |
