Abstract
Several saligenin cyclic alkyl phosphates and phosphorothionates were prepared and their insecticidal activities were examined. 2-Methoxy-4H-1,3,2-benzodioxaphosphoran-2-one and its thiono analog are strong insecticides, the toxicities of which to a number of insects are almost equal to or superior to parathion. They are less toxic to mouse than parathion. When the length of alkyl radical was increased, the insecticidal activity decreased.
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