Activity of the diastereoisomers of 13,23‐dimethylpenta‐triacontane, the sex pheromone of Glossina pallidipes, and comparison with the natural pheromone
Mcdowell, Phillip G.
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All three synthetic diastereoisomers of 13,23-dimethyl-pentatriacontane, the pheromone of Glossina pallidipes (Austen), have been tested in the G. pallidipes sex pheromone bioassay, together with one of the four diastereoisomers of 13,17-dimethylpentatriacontane, originally proposed as a candidate pheromone of G. pallidipes. Of the three isomers of 13,23-dimethylpentatriacontane only the (13R,23S) isomer was active with an ED-50 of 4.47±1.09/μg (mean±SD). The (13R,17R)-13,17-dimethylpentatriacontane was inactive. The diastereo-isomeric mixtures of 13,17- and 13,23-dimethylpentatriacontane were active with ED-50 values of 17.88±1.25/μg and 8.88±1.15μg respectively. The natural pheromone was active with an ED-50 of 8.07±1.17 μg indicating it to be a diastereoisomeric mixture.