%0 Journal Article %T Synthetic Studies on Bioactive Natural Polyketides: Intramolecular Nitrile Oxide-Olefin Cycloaddition Approach for Construction of a Macrolactone Skeleton of Macrosphelide B %A Seung-Mann Paek %A Young-Ger Suh %J Molecules %D 2011 %I MDPI AG %R 10.3390/molecules16064850 %X Studies on the synthesis of macrosphelide B via an intramolecular nitrile oxide-olefin cycloaddition (INOC) is described. In particular, an asymmetric INOC approach using phase transfer catalysts seems to be a potentially efficient and versatile procedure for the construction of the macrolactone skeleton of macrosphelide B in terms of facial selectivity. Our preliminary and unprecedented stereoselective procedure is anticipated to be usefully applied through further studies for the synthesis of the macrosphelide family. %K intramolecular nitrile oxide cycloaddition %K macrosphelide %K polyketide %K total synthesis %K phase transfer catalyst %U http://www.mdpi.com/1420-3049/16/6/4850