A highly stereoselective asymmetric total synthesis of marine polypropionate (-)-baconipyrone C has been achieved. Utilization of desymmetrization technique to create five stereogenic centres, Sharpless epoxidation, Gilman's reaction and resolution of methyl group using enzyme PS-C is the highlight of the synthesis. (C) 2009 Elsevier Ltd. All rights reserved.
Stereoselective synthesis of C12–C21 common fragment of thermolides 1–5
A highly stereoselectivesynthesis of C12–C21 common fragment of thermolides 1–5 has been described. The salient features of the synthesis are the utilization of desymmetrization protocol, Barton-McCombie reaction, Brown’s asymmetric allylation and Wacker oxidation.