First Enantioselective Total Synthesis and Absolute Configurations of 4,5-Dioxo-seco-γ-eudesmol and 5β,11-Dihydroxyiphionan-4-one, Two Aglycones of Naturally Occurring Sesquiterpenes with New Skeletons

Abstract
A facile synthetic route to two new carbon skeleton sesquiterpenes 4,5-dioxo-seco-γ-eudesmol and 5β,11-dihydroxyiphionan-4-one from (+)-dihydrocarvone has been described. The configuration of the 5β,11-dihydroxyiphionan-4-one was confirmed by stereospecific synthesis.

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