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The first total synthesis of triumfettamide (1) is described. The asymmetric syntheses of two highly functionalized units—α-hydroxylated C17 monounsaturated fatty acid unit (2) and C26 phytosphingosine (3) have been accomplished involving Sharpless asymmetric dihydroxylation, Sharpless kinetic resolution, regioselective epoxide opening, regioselective DIBAL-H reduction of acetal, Wittig olefination...
An asymmetric synthesis of both the stereoisomers (2a & 2b) of the structure 2 proposed for (9R,10S,7E)-6,9,10-trihydroxyoctadec-7-enoic acid, an immunostimulant oxylipin from the n-butanol extract of the corms of Dracontium loretense, has been accomplished. The key steps involved are using Jacobsen's hydrolytic kinetic resolution (HKR), Julia–Kocienski olefination, regioselective epoxide ring...
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