Towards a total synthesis of ulapualide A. Concise synthetic routes to the tris-oxazole ring system and tris-oxazole macrolide core in ulapualides, kabiramides, halichondramides, mycalolides and halishigamides
作者:Shital K. Chattopadhyay、James Kempson、Alan McNeil、Gerald Pattenden、Michael Reader、David E. Rippon、David Waite
DOI:10.1039/b000750l
日期:——
the synthesis of mono-, bis- and tris-2,4-disubstituted oxazoles were evaluated, which led ultimately to a concise synthesis of the three contiguous oxazole ringsystem 26 in the ulapualide family of 25-membered macrolides, e.g.1, found in marine organisms. The tris-oxazole macrolide core 30 in ulapualide A (1) was also synthesised based on a macrolactamisation strategy from the two functionalised mono-oxazole