Postulated Biogenesis of WS9885B and Progress toward an Enantioselective Synthesis
作者:Christopher D. Vanderwal、David A. Vosburg、Sven Weiler、Erik J. Sorensen
DOI:10.1021/ol990723r
日期:1999.8.1
WS9885B promotes the assembly of microtubules in vitro and displays cytotoxicity as potent as paclitaxel against several cancer cell lines. In this Letter, we propose a biogenesis for this architecturally complex bacterial metabolite from a much simpler, polyunsaturated precursor. We also present significant progress toward a convergent, enantioselective synthesis of WS9885B, Our work features a chemoselective palladium-catalyzed cross coupling of two advanced building blocks and an uncommon Claisen-like cyclization.