Stereoselective Ketal-Tethered Intramolecular Diels−Alder Cycloadditions. An Approach to the 2-Oxadecalin Spiroketal Core of Antifungal Agent Fusidilactone C
作者:Jiashi Wang、Richard P. Hsung、Sunil K. Ghosh
DOI:10.1021/ol0495624
日期:2004.6.1
[reaction: see text] An approach toward the 2-oxadecalin spiroketal core of fusidilactone C via a rare ketal-tethered intramolecular Diels-Alder cycloaddition is described here. This intramolecular Diels-Alder cycloaddition is highly endo-selective and overall depended upon the nature of solvents and Lewis acids. We also observed some remarkable rate acceleration in MeOH.
[反应:见正文]本文介绍了一种通过罕见的缩酮连接的分子内Diels-Alder环加成反应来合成Fusidilactone C的2-oxadecalin螺环酮核心的方法。这种分子内Diels-Alder环加成反应具有高度的内选择性,并且总体上取决于溶剂和路易斯酸的性质。我们还观察到在MeOH中有明显的速率加速。