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| - Efficient Synthesis of (±)-4-Methyloctanoic Acid, AggregationPheromone of Rhinoceros Beetles of the Genus Oryctes(Coleoptera: Dynastidae, Scarabaeidae)
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| - (±)-4-Methyloctanoic acid and its ethyl ester are aggregation pheromones of many rhinoceros beetlesof the genus Oryctes and are investigated for the control of these pests by olfactory trapping. Asimple, economical, and high-yield (>50%) synthesis of (±)-4-methyloctanoic acid and its ethyl esteris presented starting from n-hexanal. The key step in this sequence is an orthoester Claisenrearrangement for the elongation of the carbon chain by two. Keywords: Pheromone synthesis; rhinoceros beetles; Oryctes elegans; Oryctes rhinoceros; Oryctesmonoceros; 4-methyloctanoic acid; ethyl-4-methyloctanoate; Claisen rearrangement
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