| abstract |
NEW MATERIAL: A compound given by formula I [X is O, S, sulfinyl, sulfonyl, NR 4 (R 4 is H, lower alkyl, lower carboxylacyl); R 3 is lower alkenyl, phenyl, lower alkyl; when X is NR 4 , R 3 can be H]. n EXAMPLE: 4-Ethoxymethyl-2,3,5,6-tetrafluorobenzyl alcohol. n USE: A raw material of a novel polyfluorobenzyl ester of a cyclopropane carboxylic acid such as 3-(2,2-dihalovinyl)-2,2-dimethylcyclopropane carboxylic acid which has high insecticidal and acaricidal activity and is useful as contact or residual insecticide or as insecticidal fumigant. n PROCESS: A compound of formula II is heated with LiAlH 4 with refluxing in a solvent such as diethyl ether and reduced to obtain a compound of formula I in which X is O and R 3 is lower alkyl. n COPYRIGHT: (C)1990,JPO |