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The diastereoselective synthesis of the C17–C30 fragment of amphidinol 3 (AM3) 1 was achieved from the enantio-enriched aldehyde 20, Weinreb amide 14 and 2-bromo-3-(trimethylsilyl)propene, which was used as a bifunctional conjunctive reagent. The absolute configuration of the stereogenic centers, in both aldehyde 20 and Weinreb amide 14, were efficiently controlled by using (+)-(R)-methyl-p-tolylsulfoxide as the unique source of chirality.
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Organic & Biomolecular Chemistry
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