Stereoselective Synthesis of a Protected Side Chain of Meliponamycin A
Oliver Andler, Uli Kazmaier
Abstract
The Matteson homologation was found to be a versatile tool for the construction of the linear polyketide side chain of meliponamycin and related compounds in only four steps. The ester dienolate version of this reaction allowed the introduction of the unsaturated ester moiety in a highly stereoselective fashion. Boronate oxidation/deoxygenation and Sharpless dihydroxylation are additional key steps in the stereoselective construction of this highly functionalized tetrahydropyran ring system, which is characteristic of this substance class.
Topics & Concepts
ChemistryStereoselectivityTetrahydropyranPolyketideDeoxygenationMoietyDihydroxylationStereochemistrySharpless asymmetric dihydroxylationSide chainRing (chemistry)Combinatorial chemistryOrganic chemistryEnantioselective synthesisCatalysisBiosynthesisPolymerEnzymeSynthetic Organic Chemistry MethodsAsymmetric Synthesis and CatalysisOxidative Organic Chemistry Reactions