Studies on the Organophosphorus Insecticides

Part IV. Synthesis and Toxicity of Phosphorates and Phosphorothioates Containig 1-Phenyl-2-acyl-vinyl Group

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The reaction of O, O-dialkyl phosphorochloridates or phosphorochloridothioates with sodium salts of benzoylacetone and the reaction of trialkyl phosphites with α-chloro-benzoylacetone or acetophenone were attempted with a view to prepare the low toxic phosphorus insecticides containing acylvinyl group. It was found that the products did not have a phosphonate form but a phosphorate-form and the phenyl-acylvinyl group had linkage with phosphorus atom by the enolform of next carbonyl group of the phenyl-group.