| 摘要 |
NEW MATERIAL:A phosphoric acid ester derivative expressed by formula I (R<1> and R<2> represent lower alkyl; R<3> represents H, halogen atom, lower alkyl, lower alkoxyl or lower alkylthio; X<1> and X<2> represent H or halogen atom; Y represents O or S). EXAMPLE:O-Ethyl-S-n-propyl-O-[4-(beta,beta-dichloro-alpha-phenyl)vinyl ]phenylphosphoro tioate. USE:An insecticidal and miticidal agent without murdering and ruining the order coleoptera such as ladybird, etc., with a superior aftereffect and low toxicity to warm-blooded animals. PREPARATION:For example, according to the reaction formula, a phenol derivative expressed by formula II is reacted with phosphoric acid chloride expressed by formula III, preferably in 1-1.5 molar ratio based on the former, in the presence of an acid binder (example; tertiary amine, etc.) in a solvent such as methylene chloride, etc., normally at 0-50 deg.C for 1-5hr.
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