Enantioselective Synthesis of the Sporolide Quinone Acid Fragment
作者:Karl Gademann、Jean-Yves Wach
DOI:10.1055/s-0029-1217963
日期:2009.10
The sporolide quinone acid is a key fragment in the biosynthesis of the complex heptacyclic marine metabolite sporolide. We report a concise enantioselective route to this fragment, which is obtained in seven steps with 65% overall yield from trimethoxybenzene. The enantioselective transfer reduction is achieved by Ipc2BCl, and the absolute configuration of the product secured by X-ray analysis of its cinchonine salt. The target fragment is then obtained by methylation and oxidation to the quinone by AgO.
孢子内酯醌酸是复杂七环海洋代谢物孢子内酯生物合成的关键片段。我们报告了该片段的简明对映选择性路线,该路线通过七步从三甲氧基苯获得,总产率为 65%。通过 Ipc2BCl 实现对映选择性转移还原,并通过其辛可宁盐的 X 射线分析确保产物的绝对构型。然后通过 AgO 甲基化并氧化成醌获得目标片段。