Abstract
Four optically active isomers (optical purity >94.6% d.e.) of 2-methoxy-5-phenyI-l,3,2-oxazaphospholidine 2-sulfide (5-PMOS) were synthesized by a two-step phosphorylating method, and their insecticidal activities were determined against susceptible (SRS) and resistant (3-YF) strains of house flies by topical application. The relationship between the configuration and insecticidal activity was similar in the susceptible and resistant strains of house flies. The (R)c(R)P-isomer showed the highest insecticidal activity, followed by (R)c(S)p>(S)c(R)p>(S)c(S)p.
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