| 摘要 |
NEW MATERIAL:An isovalerianic acid ester derivative of formula I (A is O, S, NH or CH2; R1 is a group of formula II, III or IV; X is CH2 or O; n is an integer 1-3; m is an integer 1-4; R3 is alkyl, alkenyl, haloalkyl or alkoxyalkyl; R4 is H, lower alkyl, lower alkenyl, halogen or lower alkoxyl; R2 is H, cyano or ethynyl). EXAMPLE:alpha'-Cyano-m-phenoxybenzyl alpha-cyclohexylmethyloxy-isovalerianate. USE:A chemical, effective against sanitary injurious insects, agricultural and horticultural injurious insects as an insecticidal component, and very stable to light with low toxicity to warm-blooded animals. PROCESS:A carboxylic acid of formula V or a reactive derivative thereof is reacted with an alcohol of formula VI in a suitable solvent to give the aimed compound of formula I . |
