Studies on the Organophosphorus Insecticides

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 acyl-vinyl group. It was found that the products did not have a phosphonate-form but a phosphorate-form and the phenyl-acyl-vinyl group had linkage with phosphorus atom by the enol-form of next carbonyl group of the phenyl-group.